/* widgets.js — retro-instrument widget library (GW namespace).
   Classic script: load after the token :root block (tokens.json → gen_tokens.py),
   before any GW.* call. Works from file:// — no modules, no build step.
   Contract: each gallery card in panel-widget-gallery.html is the visual +
   behavioral spec its builder is judged against.
   Spec: docs/specs/2026-07-12-component-generation-spec.org */
(function () {
'use strict';
const GW = {};

/* ================= shared engine ================= */

const SVGNS = 'http://www.w3.org/2000/svg';
function svgEl(parent, tag, attrs) {
  const e = document.createElementNS(SVGNS, tag);
  for (const k in attrs) e.setAttribute(k, attrs[k]);
  parent.appendChild(e); return e;
}
function polar(cx, cy, r, deg) {
  const a = deg * Math.PI / 180;
  return [cx + r * Math.sin(a), cy - r * Math.cos(a)];
}

/* ---- pointer-drag helpers (rect-ratio based, so CSS zoom is transparent) ---- */
function dragX(el, onPct) {
  el.style.touchAction = 'none';
  const at = e => { const r = el.getBoundingClientRect(); onPct(Math.max(0, Math.min(100, (e.clientX - r.left) / r.width * 100))); };
  el.addEventListener('pointerdown', e => {
    el.setPointerCapture(e.pointerId); at(e);
    const mv = ev => at(ev), up = () => { el.removeEventListener('pointermove', mv); el.removeEventListener('pointerup', up); el.removeEventListener('pointercancel', up); };
    el.addEventListener('pointermove', mv); el.addEventListener('pointerup', up); el.addEventListener('pointercancel', up); e.preventDefault();
  });
}
function dragY(el, onPct) {
  el.style.touchAction = 'none';
  const at = e => { const r = el.getBoundingClientRect(); onPct(Math.max(0, Math.min(100, (r.bottom - e.clientY) / r.height * 100))); };
  el.addEventListener('pointerdown', e => {
    el.setPointerCapture(e.pointerId); at(e);
    const mv = ev => at(ev), up = () => { el.removeEventListener('pointermove', mv); el.removeEventListener('pointerup', up); el.removeEventListener('pointercancel', up); };
    el.addEventListener('pointermove', mv); el.addEventListener('pointerup', up); el.addEventListener('pointercancel', up); e.preventDefault();
  });
}
function dragDelta(el, get, set, opts) {
  opts = opts || {}; el.style.touchAction = 'none';
  const min = opts.min == null ? 0 : opts.min, max = opts.max == null ? 100 : opts.max, sens = opts.sens || ((max - min) / 160);
  el.addEventListener('pointerdown', e => {
    if (opts.stop) e.stopPropagation(); el.setPointerCapture(e.pointerId);
    const y0 = e.clientY, v0 = get();
    const mv = ev => { let v = v0 + (y0 - ev.clientY) * sens; set(Math.max(min, Math.min(max, v))); };
    const up = () => { el.removeEventListener('pointermove', mv); el.removeEventListener('pointerup', up); el.removeEventListener('pointercancel', up); };
    el.addEventListener('pointermove', mv); el.addEventListener('pointerup', up); el.addEventListener('pointercancel', up); e.preventDefault();
  });
}

/* ---- seven-segment digit builder ---- */
const SEG = { '0': 'abcdef', '1': 'bc', '2': 'abged', '3': 'abgcd', '4': 'fbgc', '5': 'afgcd', '6': 'afgedc', '7': 'abc', '8': 'abcdefg', '9': 'abcdfg', '-': 'g', ' ': '' };
function hseg(cy) { return `5,${cy} 7,${cy - 2} 17,${cy - 2} 19,${cy} 17,${cy + 2} 7,${cy + 2}`; }
function vseg(cx, ty, by) { return `${cx},${ty} ${cx - 2},${ty + 2} ${cx - 2},${by - 2} ${cx},${by} ${cx + 2},${by - 2} ${cx + 2},${ty + 2}`; }
const SEGPTS = { a: hseg(3), g: hseg(22), d: hseg(41), f: vseg(5, 4, 21), b: vseg(19, 4, 21), e: vseg(5, 23, 40), c: vseg(19, 23, 40) };
function seg7(ch, cls) {
  const lit = SEG[ch] || ''; let s = `<svg class="seg7 ${cls || ''}" viewBox="0 0 24 44">`;
  for (const k of 'abcdefg') {
    const on = lit.includes(k);
    const col = on ? (cls === 'red' ? 'var(--sevred)' : 'var(--sevgrn)') : 'var(--sevoff)';
    s += `<polygon points="${SEGPTS[k]}" fill="${col}"/>`;
  }
  return s + '</svg>';
}

function buildBars(el, n) { el.innerHTML = ''; for (let k = 0; k < n; k++) el.appendChild(document.createElement('i')); }

/* ---- VU law: authentic nonlinear dB scale, dB → 0..1 sweep position ---- */
const VUDB = [[-20, 0], [-10, .20], [-7, .31], [-5, .40], [-3, .50], [-2, .58], [-1, .66], [0, .75], [1, .84], [2, .91], [3, 1]];
/* interpolate a dB reading from a 0..1 sweep position */
function vuDb(t) {
  let i = 0; while (i < VUDB.length - 2 && VUDB[i + 1][1] < t) i++;
  const [d1, t1] = VUDB[i], [d2, t2] = VUDB[i + 1];
  return d1 + (d2 - d1) * Math.max(0, Math.min(1, (t - t1) / (t2 - t1)));
}

/* ---- screen-color families: period phosphor/LCD palettes as scoped CSS vars.
   Shipped literals are the fallbacks, so defaults are pixel-identical until applied. ---- */
const SCREEN_FAMS = {
  green: { '--scr-hi': '#7fe0a0', '--scr-ink': '#58b87e', '--scr-dim': '#3d5c46',
    '--scr-bg1': '#0a120c', '--scr-bg2': '#050c07', '--scr-bgc': '#04140a', '--scr-bge': '#020a05', '--scr-brd': '#123018',
    '--scr-grat': 'rgba(111,206,51,.18)', '--scr-gratc': 'rgba(111,206,51,.35)', '--scr-glow': 'rgba(127,224,160,.8)',
    '--crt-face1': '#b9d8c0', '--crt-face2': '#8bb296', '--crt-glow': '#eef7ee' },
  amber: { '--scr-hi': '#ffbe54', '--scr-ink': '#e2a038', '--scr-dim': '#7d5c16',
    '--scr-bg1': '#140d06', '--scr-bg2': '#0a0705', '--scr-bgc': '#140d06', '--scr-bge': '#0a0603', '--scr-brd': '#33230e',
    '--scr-grat': 'rgba(226,160,56,.18)', '--scr-gratc': 'rgba(226,160,56,.35)', '--scr-glow': 'rgba(255,190,84,.8)',
    '--crt-face1': '#d8cba6', '--crt-face2': '#b3a276', '--crt-glow': '#ffe7c0' },
  red: { '--scr-hi': '#ff9a4c', '--scr-ink': '#e0742e', '--scr-dim': '#5c3416',
    '--scr-bg1': '#140a05', '--scr-bg2': '#0c0603', '--scr-bgc': '#140a05', '--scr-bge': '#0a0502', '--scr-brd': '#331c0c',
    '--scr-grat': 'rgba(224,116,46,.18)', '--scr-gratc': 'rgba(224,116,46,.35)', '--scr-glow': 'rgba(255,154,76,.8)',
    '--crt-face1': '#d8b9a6', '--crt-face2': '#b39276', '--crt-glow': '#ffdcc0' },
  blue: { '--scr-hi': '#cfe4ff', '--scr-ink': '#94b8d8', '--scr-dim': '#3a4c60',
    '--scr-bg1': '#0a0e14', '--scr-bg2': '#05080c', '--scr-bgc': '#0a1018', '--scr-bge': '#04070c', '--scr-brd': '#16283a',
    '--scr-grat': 'rgba(148,184,216,.18)', '--scr-gratc': 'rgba(148,184,216,.35)', '--scr-glow': 'rgba(207,228,255,.8)',
    '--crt-face1': '#c2d2dd', '--crt-face2': '#93a8b6', '--crt-glow': '#eaf2ff' },
  vfd: { '--scr-hi': '#63e6c8', '--scr-ink': '#46b89e', '--scr-dim': '#1e4a40',
    '--scr-bg1': '#06100d', '--scr-bg2': '#040b09', '--scr-bgc': '#041410', '--scr-bge': '#020a08', '--scr-brd': '#0e3028',
    '--scr-grat': 'rgba(70,184,158,.18)', '--scr-gratc': 'rgba(70,184,158,.35)', '--scr-glow': 'rgba(99,230,200,.8)',
    '--crt-face1': '#b0d8cd', '--crt-face2': '#84ada2', '--crt-glow': '#dcfff5' },
  white: { '--scr-hi': '#f2f4f2', '--scr-ink': '#c8cac8', '--scr-dim': '#5a5c5a',
    '--scr-bg1': '#0b0c0b', '--scr-bg2': '#070807', '--scr-bgc': '#0d0e0d', '--scr-bge': '#060706', '--scr-brd': '#2a2c2a',
    '--scr-grat': 'rgba(200,202,200,.18)', '--scr-gratc': 'rgba(200,202,200,.35)', '--scr-glow': 'rgba(242,244,242,.7)',
    '--crt-face1': '#d0d2d0', '--crt-face2': '#a8aaa8', '--crt-glow': '#f7f7f7' },
};

/* ================= widget builders =================
   Every builder: GW.name(host, opts) → handle. host is an empty element the
   widget renders into. opts.onChange(value, text) fires on every state change,
   including the initial paint; text is the widget's canonical readout string. */

const noop = () => {};

/* 01 slide toggle — on/off pill. State colors ride CSS vars (--sw-*).
   opts.onStyle / offStyle / offText / thumb pick a named style per axis from
   GW.slideToggle.STYLES; defaults match the stylesheet fallbacks. The handle's
   setStyle(axis, name) restyles a live instance (the gallery chips use it). */
GW.slideToggle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const sw = document.createElement('span'); sw.className = 'switch'; host.appendChild(sw);
  const setStyle = (axis, name) => {
    const o = (GW.slideToggle.STYLES[axis] || {})[name];
    if (!o) return;
    for (const [k, v] of Object.entries(o.vars)) sw.style.setProperty(k, v);
  };
  /* opts.preset names an intent; per-axis opts still win over it, so a caller can
     take 'armed' and swap only the thumb. setPreset re-applies all four axes at
     once and returns the axis map so a host UI can resync its own controls. */
  const preset = GW.slideToggle.PRESETS[opts.preset] || GW.slideToggle.PRESETS.panel;
  /* AXIS_ORDER is load-bearing, not cosmetic: onText overrides the ink that the
     `on` style sets, so applying the axes in any other order silently drops it. */
  const setPreset = name => {
    const p = GW.slideToggle.PRESETS[name];
    if (!p) return null;
    for (const axis of GW.slideToggle.AXIS_ORDER) if (p[axis]) setStyle(axis, p[axis]);
    return p;
  };
  const pick = { on: opts.onStyle, onText: opts.onText, off: opts.offStyle,
    offText: opts.offText, thumb: opts.thumb };
  for (const axis of GW.slideToggle.AXIS_ORDER) setStyle(axis, pick[axis] || preset[axis]);
  let on;
  const set = v => { on = !!v; sw.classList.toggle('on', on); onChange(on, on ? 'ON' : 'OFF'); };
  sw.addEventListener('click', () => set(!on));
  set(opts.on !== undefined ? opts.on : true);
  return { el: sw, get: () => on, set, setStyle, setPreset };
};
/* named presets — a combination that carries intent, which is what a consumer
   actually reaches for; the STYLES axes below are how one is built. The `on`
   tone does the semantic work and the thumb material backs it: a touchscreen
   pill wears plastic, a run or armed switch wears metal. */
GW.slideToggle.AXIS_ORDER = ['on', 'onText', 'off', 'offText', 'thumb'];
GW.slideToggle.PRESETS = {
  panel: { on: 'amber', onText: 'panel', off: 'dark', offText: 'white', thumb: 'light' },
  run: { on: 'green', onText: 'panel', off: 'dark', offText: 'dim', thumb: 'chrome' },
  armed: { on: 'red', onText: 'cream', off: 'dark', offText: 'white', thumb: 'chrome' },
  caution: { on: 'warn', onText: 'panel', off: 'dark', offText: 'white', thumb: 'light' },
  /* dark — neither state lights the pill; the legend alone carries the state,
     green for on and Control red ("OFF marks") for off. The chrome thumb stays
     the position affordance, since with both pills dark it is the only one. */
  dark: { on: 'dark', onText: 'green', off: 'dark', offText: 'red', thumb: 'chrome' },
};
/* named styles per axis: dot = swatch color for pickers, vars = --sw-* overrides */
GW.slideToggle.STYLES = {
  on: {
    amber: { dot: 'var(--gold-hi)', vars: { '--sw-on-bg': 'linear-gradient(180deg,var(--amber-grad-top),var(--gold))', '--sw-on-brd': 'var(--gold-hi)', '--sw-on-ink': 'var(--panel)' } },
    green: { dot: '#8fb944', vars: { '--sw-on-bg': 'linear-gradient(180deg,#a9c95f,var(--pass))', '--sw-on-brd': '#a9c95f', '--sw-on-ink': 'var(--panel)' } },
    /* red/warn make the ENGAGED state the notable one — mute, record, airplane
       mode. Before them the only red was on the `off` axis, which paints the
       disengaged state: the opposite claim. Palette semantics: --fail is
       "muted keys", --amber-warn is "warn cells", distinct from panel amber. */
    red: { dot: 'var(--fail)', vars: { '--sw-on-bg': 'linear-gradient(180deg,#d98a6f,var(--fail))', '--sw-on-brd': 'var(--fail)', '--sw-on-ink': 'var(--cream)' } },
    warn: { dot: 'var(--amber-warn)', vars: { '--sw-on-bg': 'linear-gradient(180deg,#f7d193,var(--amber-warn))', '--sw-on-brd': 'var(--amber-warn)', '--sw-on-ink': 'var(--panel)' } },
    dark: { dot: '#242019', vars: { '--sw-on-bg': 'linear-gradient(180deg,#15130f,#242019)', '--sw-on-brd': 'var(--slate)', '--sw-on-ink': 'var(--cream)' } },
  },
  off: {
    dark: { dot: '#242019', vars: { '--sw-off-bg': 'linear-gradient(180deg,#15130f,#242019)', '--sw-off-brd': 'var(--slate)' } },
    red: { dot: 'var(--fail)', vars: { '--sw-off-bg': 'linear-gradient(180deg,#d98a6f,var(--fail))', '--sw-off-brd': 'var(--fail)' } },
  },
  /* onText overrides the ink the `on` style sets. The two are not independent —
     ink must contrast with its own background, which is why each `on` atom still
     carries a sensible default; naming onText is how a caller says "keep the
     pill, change the legend". That is what makes the `dark` preset possible:
     both states unlit, the legend colour carrying the state on its own. */
  onText: {
    panel: { dot: 'var(--panel)', vars: { '--sw-on-ink': 'var(--panel)' } },
    cream: { dot: 'var(--cream)', vars: { '--sw-on-ink': 'var(--cream)' } },
    green: { dot: 'var(--sevgrn)', vars: { '--sw-on-ink': 'var(--sevgrn)' } },
  },
  offText: {
    white: { dot: 'var(--cream)', vars: { '--sw-off-ink': 'var(--cream)' } },
    /* Control red — the palette's "OFF marks" ink, so a red OFF legend is the
       kit's existing grammar rather than a new claim. */
    red: { dot: '#e0523a', vars: { '--sw-off-ink': '#e0523a' } },
    /* steel is the kit's engraved-caption ink: lets an off toggle recede where a
       panel carries many of them and eight cream OFFs would all shout equally. */
    dim: { dot: 'var(--steel)', vars: { '--sw-off-ink': 'var(--steel)' } },
    black: { dot: '#14110e', vars: { '--sw-off-ink': '#14110e' } },
  },
  thumb: {
    light: { dot: '#d8d2c4', vars: { '--sw-thumb': 'radial-gradient(circle at 35% 28%,#f6f2e8,#b0aa9a)' } },
    dark: { dot: '#2c2824', vars: { '--sw-thumb': 'radial-gradient(circle at 35% 28%,#4a453e,#16130f)' } },
    chrome: { dot: '#9aa2b4', vars: { '--sw-thumb': 'radial-gradient(circle at 35% 28%,#dfe6f2,#6d7484)' } },
    brass: { dot: '#b8944a', vars: { '--sw-thumb': 'radial-gradient(circle at 35% 28%,#e2c47a,#8a6a24)' } },
  },
};

/* 02 console keys — mutually exclusive push buttons; {label, tone} per key.
   tone picks the engaged look: undefined = gold (the default lit key), 'green' =
   run green, 'red' = terracotta. Reading order runs safe -> live -> muted, and
   LIVE takes green because that is what --pass means everywhere else in the kit
   (the palette names it "run lamps, gear greens, monitor bars, LIVE lamps"). */
GW.consoleKeys = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const keys = opts.keys || GW.consoleKeys.DEFAULT_KEYS;
  const wrap = document.createElement('span'); host.appendChild(wrap);
  const btns = keys.map(k => {
    const b = document.createElement('button'); b.className = 'key'; b.textContent = k.label;
    wrap.appendChild(b); return b;
  });
  let idx;
  const set = i => {
    idx = Math.max(0, Math.min(keys.length - 1, i));
    btns.forEach((b, j) => {
      b.classList.remove('on', 'green', 'red');
      if (j === idx) b.classList.add(keys[idx].tone || 'on');
    });
    onChange(idx, keys[idx].label);
  };
  btns.forEach((b, i) => b.addEventListener('click', () => set(i)));
  /* The default set engages LIVE, not the first key: it is the meaningful
     resting state for a console and it shows the green. A caller supplying its
     own keys gets the first one unless it says otherwise. */
  set(opts.active !== undefined ? opts.active
    : (keys === GW.consoleKeys.DEFAULT_KEYS ? 1 : 0));
  return { el: wrap, get: () => idx, set };
};
GW.consoleKeys.DEFAULT_KEYS = [
  { label: 'SCAN' }, { label: 'LIVE', tone: 'green' }, { label: 'MUTED', tone: 'red' },
];

/* 03 horizontal fader — continuous 0-100 */
GW.faderH = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const f = document.createElement('div'); f.className = 'fader';
  f.innerHTML = '<div class="slot"><div class="fill"></div></div><div class="cap"></div>';
  host.appendChild(f);
  let val;
  const set = p => {
    val = Math.max(0, Math.min(100, p));
    f.querySelector('.fill').style.width = val + '%';
    f.querySelector('.cap').style.left = val + '%';
    onChange(val, 'level ' + Math.round(val));
  };
  dragX(f, set);
  set(opts.value !== undefined ? opts.value : 68);
  return { el: f, get: () => val, set };
};

/* 04 vertical fader — one channel-strip fader; compose per channel */
GW.faderV = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const f = document.createElement('div'); f.className = 'vfader';
  f.innerHTML = '<div class="slot"><div class="fill"></div></div><div class="cap"></div>';
  host.appendChild(f);
  let val;
  const set = p => {
    val = Math.max(0, Math.min(100, p));
    f.querySelector('.fill').style.height = val + '%';
    f.querySelector('.cap').style.bottom = val + '%';
    onChange(val, 'level ' + Math.round(val));
  };
  dragY(f, set);
  set(opts.value !== undefined ? opts.value : 60);
  return { el: f, get: () => val, set };
};

/* 05 rotary knob — drag up/down to turn, -150°..+150° sweep */
GW.knob = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const min = opts.min !== undefined ? opts.min : 0, max = opts.max !== undefined ? opts.max : 100;
  const k = document.createElement('span'); k.className = 'knob';
  k.innerHTML = '<span class="ind"></span>';
  host.appendChild(k);
  let val;
  const set = v => {
    val = Math.max(min, Math.min(max, v));
    k.querySelector('.ind').style.transform = `rotate(${-150 + (val - min) / (max - min) * 300}deg)`;
    onChange(val, String(Math.round(val)));
  };
  dragDelta(k, () => val, set, { min, max });
  set(opts.value !== undefined ? opts.value : 53);
  return { el: k, get: () => val, set };
};

/* 06 segmented selector — pick one of a few. opts.accent picks the lit-segment
   color from GW.segmented.STYLES (amber / green / red); defaults match the
   stylesheet fallbacks. setStyle(axis, name) restyles a live instance. */
GW.segmented = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const items = opts.items || ['TIMER', 'ALARM', 'POMO'];
  const seg = document.createElement('div'); seg.className = 'seg'; host.appendChild(seg);
  const setStyle = (axis, name) => {
    const o = (GW.segmented.STYLES[axis] || {})[name];
    if (!o) return;
    for (const [k, v] of Object.entries(o.vars)) seg.style.setProperty(k, v);
  };
  setStyle('accent', opts.accent || 'amber');
  const btns = items.map(t => { const b = document.createElement('button'); b.textContent = t; seg.appendChild(b); return b; });
  let idx;
  const set = i => { idx = i; btns.forEach((b, j) => b.classList.toggle('on', j === i)); onChange(i, items[i]); };
  btns.forEach((b, i) => b.addEventListener('click', () => set(i)));
  set(opts.active || 0);
  return { el: seg, get: () => idx, set, setStyle };
};
/* named styles per axis: dot = swatch color for pickers, vars = --seg-* overrides */
GW.segmented.STYLES = {
  accent: {
    amber: { dot: 'var(--gold-hi)', vars: { '--seg-on-bg': 'linear-gradient(180deg,var(--amber-grad-top),var(--gold))', '--seg-on-ink': 'var(--panel)' } },
    green: { dot: '#8fb944', vars: { '--seg-on-bg': 'linear-gradient(180deg,#a9c95f,var(--pass))', '--seg-on-ink': 'var(--panel)' } },
    red: { dot: 'var(--fail)', vars: { '--seg-on-bg': 'linear-gradient(180deg,#d98a6f,var(--fail))', '--seg-on-ink': 'var(--panel)' } },
  },
};

/* 07 chip toggle — inline binary inside a line of text */
GW.chipToggle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const chip = document.createElement('span'); chip.className = 'chip';
  chip.textContent = opts.label || 'discoverable on';
  host.appendChild(chip);
  let on;
  const set = v => { on = !!v; chip.classList.toggle('on', on); onChange(on, on ? 'ON' : 'OFF'); };
  chip.addEventListener('click', () => set(!on));
  set(opts.on !== undefined ? opts.on : true);
  return { el: chip, get: () => on, set };
};

/* 08 arm-to-fire — two-stage confirm for destructive actions */
GW.armButton = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const label = opts.label || 'forget', armLabel = opts.armLabel || label + '? again';
  const a = document.createElement('button'); a.className = 'arm'; a.textContent = label;
  host.appendChild(a);
  let armed = false;
  a.addEventListener('click', () => {
    if (!armed) { armed = true; a.classList.add('armed'); a.textContent = armLabel; onChange('armed', 'ARMED'); }
    else { armed = false; a.classList.remove('armed'); a.textContent = label; onChange('fired', 'FIRED · reset'); }
  });
  onChange('safe', 'SAFE');
  return { el: a, get: () => (armed ? 'armed' : 'safe'), fire: () => a.click() };
};

/* 09 lamp row — actionable list item: lamp + name + status, click to cycle */
GW.lampRow = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const name = opts.name || 'WH-1000XM4';
  const states = opts.states || [['gold', 'tap to connect'], ['busy', 'connecting…'], ['', 'connected']];
  const row = document.createElement('div'); row.className = 'lrow';
  row.innerHTML = `<span class="lamp"></span><span class="who"><b></b></span><span class="what"></span>`;
  row.querySelector('b').textContent = name;
  host.appendChild(row);
  let idx;
  const set = i => {
    idx = i;
    row.querySelector('.lamp').className = 'lamp ' + states[i][0];
    row.querySelector('.what').textContent = states[i][1];
    onChange(i, states[i][1]);
  };
  row.addEventListener('click', () => set((idx + 1) % states.length));
  set(opts.state || 0);
  return { el: row, get: () => idx, set };
};

/* 24 rotary selector — pick one of five printed detents by position */
GW.rotarySelector = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const values = opts.values || [4, 6, 8, 10, 12];
  const fmt = opts.fmt || (v => 'size ' + v);
  const POS = [[14, 53], [28, 18], [50, 7], [72, 18], [86, 53]], ANG = [-70, -35, 0, 35, 70];
  const rs = document.createElement('span'); rs.className = 'rotsel';
  values.forEach((v, i) => {
    const p = document.createElement('span'); p.className = 'pos';
    p.style.left = POS[i][0] + '%'; p.style.top = POS[i][1] + '%'; p.textContent = v;
    rs.appendChild(p);
  });
  const k = document.createElement('span'); k.className = 'knob'; k.innerHTML = '<span class="ind"></span>'; rs.appendChild(k);
  host.appendChild(rs);
  let idx;
  const set = i => {
    idx = ((i % values.length) + values.length) % values.length;
    rs.querySelector('.ind').style.transform = `rotate(${ANG[idx]}deg)`;
    rs.querySelectorAll('.pos').forEach((p, j) => p.classList.toggle('on', j === idx));
    onChange(values[idx], fmt(values[idx]));
  };
  k.addEventListener('click', () => set(idx + 1));
  set(opts.index !== undefined ? opts.index : 2);
  return { el: rs, get: () => values[idx], set };
};

/* 25 slide-rule dial — lit pointer on a printed scale. The printed numerals
   are the majors; the integer units between them get minor ticks and are
   selectable too. Click a numeral, a mark, or between marks; ←/→ (↑/↓) step
   one unit. set() takes a stop index; get() returns the value. opts.skin picks
   a face from GW.slideRule.STYLES (warm backlit / chrome / 80s black glass / marantz blue);
   setStyle(axis, name) restyles a live instance. */
GW.slideRule = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const majors = opts.values || [4, 6, 8, 10, 12];
  const fmt = opts.fmt || (v => 'pos ' + v);
  const X = [12, 51, 90, 129, 168];
  /* expand to unit stops: every integer between adjacent numeric majors */
  const stops = [];
  majors.forEach((v, i) => {
    stops.push({ v, x: X[i], major: true });
    const b = majors[i + 1];
    if (typeof v === 'number' && typeof b === 'number')
      for (let u = v + 1; u < b; u++)
        stops.push({ v: u, x: X[i] + (X[i + 1] - X[i]) * (u - v) / (b - v), major: false });
  });
  const t = document.createElement('span'); t.className = 'tuner';
  t.tabIndex = 0; t.setAttribute('role', 'slider'); t.setAttribute('aria-label', 'slide-rule value');
  const setStyle = (axis, name) => {
    const o = (GW.slideRule.STYLES[axis] || {})[name];
    if (!o) return;
    for (const [k, v] of Object.entries(o.vars)) t.style.setProperty(k, v);
  };
  setStyle('skin', opts.skin || 'warm');
  stops.forEach(s => {
    t.insertAdjacentHTML('beforeend', s.major
      ? `<span class="tick" style="left:${s.x}px"></span><span class="mk" style="left:${s.x}px">${s.v}</span>`
      : `<span class="tick mn" style="left:${s.x}px"></span>`);
  });
  const ndl = document.createElement('span'); ndl.className = 'ndl'; t.appendChild(ndl);
  host.appendChild(t);
  let idx;
  const set = i => {
    idx = Math.max(0, Math.min(stops.length - 1, i));
    ndl.style.left = stops[idx].x + 'px';
    t.querySelectorAll('.mk').forEach(m => m.classList.toggle('on', +m.textContent === stops[idx].v));
    onChange(stops[idx].v, fmt(stops[idx].v));
  };
  t.addEventListener('click', e => {
    const r = t.getBoundingClientRect();
    /* rect is visual px but stop coords are layout px — divide the CSS zoom out */
    const x = (e.clientX - r.left) * (t.offsetWidth / r.width);
    let best = 0, bd = 1e9; stops.forEach((s, j) => { const d = Math.abs(s.x - x); if (d < bd) { bd = d; best = j; } });
    set(best); t.focus();
  });
  t.addEventListener('keydown', e => {
    if (e.key === 'ArrowLeft' || e.key === 'ArrowDown') { e.preventDefault(); set(idx - 1); }
    else if (e.key === 'ArrowRight' || e.key === 'ArrowUp') { e.preventDefault(); set(idx + 1); }
  });
  const initV = opts.value !== undefined ? opts.value : majors[opts.index !== undefined ? opts.index : 2];
  const init = stops.findIndex(s => s.v === initV);
  set(init < 0 ? 0 : init);
  return { el: t, get: () => stops[idx].v, set, setStyle };
};
/* named faces: dot = swatch color for pickers, vars = --tn-* overrides.
   warm restates the stylesheet fallbacks so switching back is exact. */
GW.slideRule.STYLES = {
  skin: {
    warm: { dot: 'var(--gold-hi)', vars: {
      '--tn-bg': 'linear-gradient(180deg,#191510,#0b0908)', '--tn-brd': '#2a251c',
      '--tn-glow': 'rgba(var(--glow-lo),.12)', '--tn-tick': 'var(--steel)', '--tn-ink': 'var(--steel)',
      '--tn-on': 'var(--gold-hi)', '--tn-onglow': 'rgba(var(--glow-hi),.6)',
      '--tn-ndl': 'var(--fail)', '--tn-ndlglow': 'rgba(203,107,77,.85)' } },
    chrome: { dot: '#dfe6f2', vars: {
      '--tn-bg': 'linear-gradient(180deg,#e9e9e5,#bcbcb6)', '--tn-brd': '#8e8e88',
      '--tn-glow': 'rgba(255,255,255,.28)', '--tn-tick': '#3c3a34', '--tn-ink': '#3c3a34',
      '--tn-on': '#14110e', '--tn-onglow': 'none',
      '--tn-ndl': 'var(--fail)', '--tn-ndlglow': 'rgba(203,107,77,.45)' } },
    black: { dot: '#1c1a18', vars: {
      '--tn-bg': 'linear-gradient(180deg,#17181a,#08090a)', '--tn-brd': '#000',
      '--tn-glow': 'rgba(255,255,255,.05)', '--tn-tick': '#c8cac8', '--tn-ink': '#c8cac8',
      '--tn-on': '#f2f4f2', '--tn-onglow': 'rgba(242,244,242,.5)',
      '--tn-ndl': '#ff3b28', '--tn-ndlglow': 'rgba(255,59,40,.9)' } },
    blue: { dot: '#8fb4d8', vars: {
      '--tn-bg': 'linear-gradient(180deg,#0c1520,#070c14)', '--tn-brd': '#1c2c40',
      '--tn-glow': 'rgba(120,170,230,.16)', '--tn-tick': '#8fb4d8', '--tn-ink': '#8fb4d8',
      '--tn-on': '#cfe4ff', '--tn-onglow': 'rgba(150,200,255,.7)',
      '--tn-ndl': '#e8f2ff', '--tn-ndlglow': 'rgba(180,220,255,.9)' } },
  },
};

/* N01 rocker power switch — hard on/off, lit legend */
GW.rocker = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const r = document.createElement('span'); r.className = 'rocker';
  r.innerHTML = `<span class="half top">${opts.onLabel || 'ON'}</span><span class="half bot">${opts.offLabel || 'OFF'}</span>`;
  host.appendChild(r);
  let on;
  const set = v => { on = !!v; r.classList.toggle('on', on); onChange(on, on ? 'ON' : 'OFF'); };
  r.addEventListener('click', () => set(!on));
  set(opts.on !== undefined ? opts.on : true);
  return { el: r, get: () => on, set };
};

/* N02 transport cluster — rew/play/stop/rec, one lit; reels turn while playing.
   opts.animate: reels obey play state (default: not prefers-reduced-motion) */
GW.transport = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const animate = opts.animate !== undefined ? opts.animate : !matchMedia('(prefers-reduced-motion: reduce)').matches;
  const MODES = { rew: '⏮', play: '▶', stop: '⏹', rec: '⏺' };
  const NAMES = { rew: 'REW', play: 'PLAY', stop: 'STOP', rec: 'REC' };
  const wrap = document.createElement('div');
  wrap.style.cssText = 'display:flex;flex-direction:column;gap:6px;align-items:center';
  wrap.innerHTML = `<div class="reels"><span class="reel spin"><i></i><i></i><i></i></span><span class="reel spin"><i></i><i></i><i></i></span></div><div class="transport"></div>`;
  const bar = wrap.querySelector('.transport');
  const btns = {};
  for (const m of Object.keys(MODES)) {
    const b = document.createElement('button'); b.className = 'tbtn' + (m === 'rec' ? ' rec' : '');
    b.textContent = MODES[m]; bar.appendChild(b); btns[m] = b;
    b.addEventListener('click', () => set(m));
  }
  host.appendChild(wrap);
  let mode;
  const set = m => {
    mode = m;
    for (const k in btns) btns[k].classList.toggle('on', k === m);
    wrap.querySelectorAll('.reel.spin').forEach(r => r.style.animationPlayState = (m === 'play' && animate) ? 'running' : 'paused');
    onChange(m, NAMES[m]);
  };
  /* initial: light the mode but leave reel play-state to CSS, matching load behavior */
  mode = opts.mode || 'play';
  btns[mode].classList.add('on');
  onChange(mode, NAMES[mode]);
  return { el: wrap, get: () => mode, set };
};

/* N03 radio preset bank — mechanically exclusive presets */
GW.presetBank = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const items = opts.items || ['WIFI', 'ETH', 'CELL', 'OFF'];
  const bank = document.createElement('div'); bank.className = 'radiobank'; host.appendChild(bank);
  const btns = items.map(t => { const b = document.createElement('button'); b.className = 'preset'; b.textContent = t; bank.appendChild(b); return b; });
  let idx;
  const set = i => { idx = i; btns.forEach((b, j) => b.classList.toggle('on', j === i)); onChange(i, items[i]); };
  btns.forEach((b, i) => b.addEventListener('click', () => set(i)));
  set(opts.active || 0);
  return { el: bank, get: () => idx, set };
};

/* N04 concentric dual knob — two values on one spindle, outer ring + inner cap */
GW.dualKnob = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const dk = document.createElement('span'); dk.className = 'dualknob';
  dk.innerHTML = `<span class="outer"><span class="tick" style="transform:rotate(-120deg)"></span><span class="tick" style="transform:rotate(120deg)"></span></span><span class="inner"><span class="ind"></span></span>`;
  host.appendChild(dk);
  const o = dk.querySelector('.outer'), n = dk.querySelector('.inner');
  let oV, iV;
  const paint = () => {
    o.style.transform = `rotate(${-150 + oV / 100 * 300}deg)`;
    n.style.transform = `rotate(${-150 + iV / 100 * 300}deg)`;
    onChange(oV, iV);
  };
  dragDelta(o, () => oV, v => { oV = v; paint(); }, { min: 0, max: 100 });
  dragDelta(n, () => iV, v => { iV = v; paint(); }, { min: 0, max: 100, stop: true });
  oV = opts.outer !== undefined ? opts.outer : 50;
  iV = opts.inner !== undefined ? opts.inner : 50;
  paint();
  return { el: dk, get: () => [oV, iV], set: (a, b) => { if (a !== undefined) oV = a; if (b !== undefined) iV = b; paint(); } };
};

/* N05 rotary encoder + LED ring — endless dial, lit arc tracks the level */
GW.encoder = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const enc = document.createElement('span'); enc.className = 'encoder'; host.appendChild(enc);
  const R = 27, cx = 33, cy = 33;
  for (let i = 0; i < 12; i++) {
    const a = (i * 30 - 90) * Math.PI / 180;
    const d = document.createElement('span'); d.className = 'led';
    d.style.left = (cx + R * Math.cos(a)) + 'px'; d.style.top = (cy + R * Math.sin(a)) + 'px';
    enc.appendChild(d);
  }
  const k = document.createElement('span'); k.className = 'knob'; k.innerHTML = '<span class="ind"></span>'; enc.appendChild(k);
  let val;
  const set = v => {
    val = v;
    const lit = ((Math.floor(val) % 12) + 12) % 12;
    enc.querySelectorAll('.led').forEach((l, i) => l.classList.toggle('on', i <= lit));
    k.style.transform = `rotate(${val * 30}deg)`;
    onChange(val, 'pos ' + Math.round(val));
  };
  dragDelta(enc, () => val, set, { min: 0, max: 100000, sens: 0.25 });
  set(opts.value !== undefined ? opts.value : 7);
  return { el: enc, get: () => val, set };
};

/* N06 keyed mode switch — guarded three-position mode, key-bit points at the live one */
GW.keySwitch = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const items = opts.items || ['OFF', 'ON', 'RUN'];
  const ANG = [-70, 0, 70], POS = [[16, 64], [50, 12], [84, 64]];
  const kl = document.createElement('span'); kl.className = 'keylock';
  items.forEach((t, i) => {
    const p = document.createElement('span'); p.className = 'kpos';
    p.style.left = POS[i][0] + '%'; p.style.top = POS[i][1] + '%'; p.textContent = t;
    kl.appendChild(p);
  });
  const body = document.createElement('span'); body.className = 'body';
  body.innerHTML = '<span class="bit"></span><span class="barrel"></span>';
  kl.appendChild(body); host.appendChild(kl);
  let idx;
  const set = i => {
    idx = ((i % items.length) + items.length) % items.length;
    body.querySelector('.bit').style.transform = `rotate(${ANG[idx]}deg)`;
    kl.querySelectorAll('.kpos').forEach((p, j) => p.classList.toggle('on', j === idx));
    onChange(idx, items[idx]);
  };
  body.addEventListener('click', () => set(idx + 1));
  set(opts.index !== undefined ? opts.index : 1);
  return { el: kl, get: () => idx, set };
};

/* N07 center-detented crossfader — throw to either side of zero */
GW.crossfader = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const xf = document.createElement('div'); xf.className = 'xfader';
  xf.innerHTML = `<div class="slot"></div><div class="detent"></div><span class="end" style="left:0">${opts.aLabel || 'A'}</span><span class="end" style="right:0">${opts.bLabel || 'B'}</span><div class="cap"></div>`;
  host.appendChild(xf);
  let pct;
  const set = p => {
    pct = Math.max(0, Math.min(100, p));
    xf.querySelector('.cap').style.left = pct + '%';
    const v = Math.round(pct - 50);
    onChange(v, (v > 0 ? '+' : '') + v);
  };
  dragX(xf, set);
  set(opts.value !== undefined ? opts.value : 50);
  return { el: xf, get: () => Math.round(pct - 50), set };
};

/* N08 thumbwheel — knurled edge-wheel with a windowed two-digit value */
GW.thumbwheel = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const w = document.createElement('div'); w.className = 'thumbw';
  w.innerHTML = '<span class="thumbwheel"></span><span class="win"></span>';
  host.appendChild(w);
  let val;
  const set = v => {
    val = Math.round(v);
    const s = ((val % 100) + 100) % 100;
    w.querySelector('.win').textContent = String(s).padStart(2, '0');
    onChange(s, 'value ' + s);
  };
  dragDelta(w.querySelector('.thumbwheel'), () => val, set, { min: 0, max: 99, sens: 0.2 });
  set(opts.value !== undefined ? opts.value : 42);
  return { el: w, get: () => ((val % 100) + 100) % 100, set };
};

/* N09 DIP-switch bank — hard flags, up is on; readout is the binary word */
GW.dipBank = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const bits = opts.bits || [true, false, true, true, false, false];
  const bank = document.createElement('span'); bank.className = 'dip'; host.appendChild(bank);
  const sws = bits.map(on => {
    const s = document.createElement('span'); s.className = 'dipsw' + (on ? ' on' : '');
    s.innerHTML = '<i></i>'; bank.appendChild(s); return s;
  });
  const word = () => sws.map(x => x.classList.contains('on') ? '1' : '0').join('');
  const upd = () => onChange(word(), word());
  sws.forEach(s => s.addEventListener('click', () => { s.classList.toggle('on'); upd(); }));
  upd();
  return { el: bank, get: word, set: w => { sws.forEach((s, i) => s.classList.toggle('on', w[i] === '1')); upd(); } };
};

/* N10 jog / shuttle wheel — scrub fine; position accumulates without limit */
GW.jogWheel = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const j = document.createElement('span'); j.className = 'jog';
  j.innerHTML = `<span class="shuttle" style="--sh:40deg"></span><span class="inner"><span class="dimple"></span></span>`;
  host.appendChild(j);
  let val;
  const set = v => {
    val = v;
    j.querySelector('.inner').style.transform = `rotate(${val * 4}deg)`;
    onChange(val, 'pos ' + Math.round(val));
  };
  dragDelta(j, () => val, set, { min: -100000, max: 100000, sens: 0.5 });
  set(opts.value !== undefined ? opts.value : 0);
  return { el: j, get: () => val, set };
};

/* ---- shared SVG defs: gradients/filters referenced by url(#id) are
   document-scoped, and several are used across widgets. Builders ensure the
   defs they use; the first caller creates it, later calls are no-ops. ---- */
let defsRoot = null;
const defsMade = new Set();
function defsHost() {
  if (!defsRoot) {
    const svg = document.createElementNS(SVGNS, 'svg');
    svg.setAttribute('width', 0); svg.setAttribute('height', 0);
    svg.setAttribute('aria-hidden', 'true');
    svg.style.position = 'absolute';
    defsRoot = document.createElementNS(SVGNS, 'defs');
    svg.appendChild(defsRoot);
    document.body.appendChild(svg);
  }
  return defsRoot;
}
function def(id, make) { if (defsMade.has(id)) return; defsMade.add(id); make(defsHost(), id); }
function gradDef(id, kind, attrs, stops) {
  def(id, d => {
    const g = svgEl(d, kind, Object.assign({ id }, attrs));
    for (const [offset, color] of stops) svgEl(g, 'stop', { offset, 'stop-color': color });
  });
}
function stageSvg(host, cls, vw, vh) {
  const s = document.createElementNS(SVGNS, 'svg');
  s.setAttribute('class', cls); s.setAttribute('viewBox', `0 0 ${vw} ${vh}`);
  s.setAttribute('width', vw); s.setAttribute('height', vh);
  host.appendChild(s); return s;
}
/* instance-unique ids for defs that can't be shared (e.g. clip paths sized per instance) */
let uidN = 0;
function uid(prefix) { return prefix + '-' + (++uidN); }

/* R02 calibrated vernier dial — the disc turns under a fixed hairline */
GW.vernierDial = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 150, 150), cx = 75, cy = 75;
  gradDef('vernFace', 'radialGradient', { cx: '50%', cy: '45%', r: '60%' }, [['0', '#f7f2da'], ['1', '#e4dfc2']]);
  gradDef('bakeKnob', 'radialGradient', { cx: '42%', cy: '36%', r: '75%' }, [['0', '#37332c'], ['1', '#060505']]);
  svgEl(s, 'circle', { cx, cy, r: 72, fill: '#0c0b0a', stroke: '#262320' });
  const disc = svgEl(s, 'g', {});
  svgEl(disc, 'circle', { cx, cy, r: 66, fill: 'url(#vernFace)', stroke: '#b7b29a', 'stroke-width': 1 });
  for (let u = 0; u <= 100; u++) {
    const a = u * 3, major = u % 10 === 0, half = u % 5 === 0;
    const len = major ? 10 : half ? 7 : 4.5, [x1, y1] = polar(cx, cy, 63, a), [x2, y2] = polar(cx, cy, 63 - len, a);
    svgEl(disc, 'line', { x1, y1, x2, y2, stroke: '#3a3128', 'stroke-width': major ? 1.3 : half ? 1 : .7 });
    if (major) {
      const g = svgEl(disc, 'g', { transform: `rotate(${a},${cx},${cy})` });
      svgEl(g, 'text', { x: cx, y: cy - 44, 'text-anchor': 'middle', 'font-size': 7.5, 'font-family': 'var(--mono)', fill: '#3a3128' }).textContent = u;
    }
  }
  for (let k = 0; k < 12; k++) { const [x, y] = polar(cx, cy, 24, k * 30); svgEl(s, 'circle', { cx: x, cy: y, r: 4.8, fill: 'url(#bakeKnob)' }); }
  svgEl(s, 'circle', { cx, cy, r: 24, fill: 'url(#bakeKnob)', stroke: '#000', 'stroke-width': .6 });
  svgEl(s, 'circle', { cx, cy, r: 16, fill: 'url(#bakeKnob)' });
  svgEl(s, 'ellipse', { cx: 69, cy: 66, rx: 7, ry: 4, fill: 'rgba(255,255,255,.10)', transform: 'rotate(-32,69,66)' });
  svgEl(s, 'line', { x1: cx, y1: 6, x2: cx, y2: 22, stroke: 'var(--fail)', 'stroke-width': 2.2, 'stroke-linecap': 'round' });
  let val;
  const set = v => { val = v; disc.setAttribute('transform', `rotate(${-v * 3},75,75)`); onChange(val, val.toFixed(1)); };
  dragDelta(s, () => val, set, { min: 0, max: 100, sens: 0.15 });
  set(opts.value !== undefined ? opts.value : 42.0);
  return { el: s, get: () => val, set };
};

/* R03 bat-handle toggle — chrome lever throws between lit legends */
GW.batToggle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 70, 90), cx = 35, cy = 44;
  gradDef('nutG', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#8a8578'], ['1', '#4e4a42']]);
  gradDef('chromeG', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 0 }, [['0', '#7e7a70'], ['.45', '#e8e5db'], ['1', '#8a867c']]);
  gradDef('tipG', 'radialGradient', { cx: '40%', cy: '32%', r: '75%' }, [['0', '#f2efe8'], ['1', '#7e7a70']]);
  const lblOn = svgEl(s, 'text', { x: cx, y: 9, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--gold-hi)' });
  lblOn.textContent = opts.onLabel || 'ON';
  const lblOff = svgEl(s, 'text', { x: cx, y: 87, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--dim)' });
  lblOff.textContent = opts.offLabel || 'OFF';
  const pts = []; for (let k = 0; k < 6; k++) { const a = (k * 60 + 30) * Math.PI / 180; pts.push((cx + 17 * Math.cos(a)) + ',' + (cy + 17 * Math.sin(a))); }
  svgEl(s, 'polygon', { points: pts.join(' '), fill: 'url(#nutG)', stroke: '#2b2822' });
  svgEl(s, 'circle', { cx, cy, r: 9, fill: '#14110e', stroke: '#000' });
  const lever = svgEl(s, 'g', {});
  svgEl(lever, 'path', { d: `M ${cx - 3.2} ${cy} L ${cx - 1.8} 21 L ${cx + 1.8} 21 L ${cx + 3.2} ${cy} Z`, fill: 'url(#chromeG)', stroke: '#4e4a42', 'stroke-width': .5 });
  svgEl(lever, 'ellipse', { cx, cy: 17, rx: 6.5, ry: 8, fill: 'url(#tipG)', stroke: '#5e5a52', 'stroke-width': .6 });
  lever.style.transformOrigin = `${cx}px ${cy}px`; lever.style.transition = 'transform .12s';
  let on;
  const set = v => {
    on = !!v;
    lever.style.transform = on ? 'rotate(0deg)' : 'rotate(180deg)';
    lblOn.setAttribute('fill', on ? 'var(--gold-hi)' : 'var(--dim)');
    lblOff.setAttribute('fill', on ? 'var(--dim)' : 'var(--gold-hi)');
    onChange(on, on ? 'ON' : 'OFF');
  };
  s.addEventListener('click', () => set(!on));
  set(opts.on !== undefined ? opts.on : true);
  return { el: s, get: () => on, set };
};

/* R04 bakelite fluted knob — scallop skirt over a printed 0-10 arc */
GW.flutedKnob = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 110, 110), cx = 55, cy = 54;
  gradDef('bakeSk', 'radialGradient', { cx: '42%', cy: '36%', r: '80%' }, [['0', '#312d27'], ['1', '#050404']]);
  gradDef('bakeDome', 'radialGradient', { cx: '40%', cy: '32%', r: '80%' }, [['0', '#3a362f'], ['1', '#0a0908']]);
  for (let i = 0; i <= 10; i++) {
    const a = -135 + i * 27, major = i % 5 === 0;
    const [x1, y1] = polar(cx, cy, 38, a), [x2, y2] = polar(cx, cy, major ? 45 : 43.5, a);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--steel)', 'stroke-width': major ? 1.5 : 1 });
    if (major) {
      const [x, y] = polar(cx, cy, 50.5, a);
      svgEl(s, 'text', { x, y: y + 2.6, 'text-anchor': 'middle', 'font-size': 8, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = i;
    }
  }
  for (let k = 0; k < 18; k++) { const [x, y] = polar(cx, cy, 31, k * 20); svgEl(s, 'circle', { cx: x, cy: y, r: 3.4, fill: 'url(#bakeSk)' }); }
  svgEl(s, 'circle', { cx, cy, r: 31, fill: 'url(#bakeSk)', stroke: '#000', 'stroke-width': .6 });
  const idx = svgEl(s, 'line', { x1: cx, y1: cy - 30, x2: cx, y2: cy - 21, stroke: 'var(--gold-hi)', 'stroke-width': 2.4, 'stroke-linecap': 'round' });
  svgEl(s, 'circle', { cx, cy, r: 19, fill: 'url(#bakeDome)' });
  svgEl(s, 'ellipse', { cx: 49, cy: 46, rx: 6, ry: 3.5, fill: 'rgba(255,255,255,.14)', transform: 'rotate(-28,49,46)' });
  let val;
  const set = v => { val = v; idx.setAttribute('transform', `rotate(${v * 2.7 - 135},55,54)`); onChange(val, (val / 10).toFixed(1) + ' / 10'); };
  dragDelta(s, () => val, set, { min: 0, max: 100, sens: 0.25 });
  set(opts.value !== undefined ? opts.value : 63);
  return { el: s, get: () => val, set };
};

/* R05 filter slider bank — a dense fader wall on a real faceplate. Period skins
   as constructor opts backed by GW.filterBank.STYLES, three independent axes:
   panel (silver hi-fi aluminum / studio black), caps — the cap SHAPE
   (chrome T / short ribbed / tall block fader), and capColor — the cap
   FINISH (black white-index / color stripes / chrome / cream). opts.style
   picks a native trio (silver+chrome+chrome, studio+ribbed+red);
   opts.panel / opts.caps / opts.capColor override an axis; setStyle(axis, name)
   restyles live (values kept). After the Pioneer SG-9500, the Technics
   SH-8065, and the Zaxcom Oasis block faders. */
GW.filterBank = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const freqs = opts.freqs || [78, 113, 163, 235, 339, 487, 701, 1010, 1450, 2090, 3010, 4340];
  const vals = (opts.values || [18, 30, 42, 25, 35, 55, 20, 48, 38, 26, 44, 32]).slice(0, freqs.length);
  while (vals.length < freqs.length) vals.push(30);
  const fmtHz = f => f < 1000 ? f : (f / 1000).toFixed(1).replace(/\.0$/, '') + 'k';
  const ST = GW.filterBank.STYLES;
  const native = {
    silver: { caps: 'chrome', capColor: 'chrome' },
    studio: { caps: 'ribbed', capColor: 'red' },
  };
  const nat = native[opts.style] || {};
  const cur = {
    panel: ST.panel[opts.panel] ? opts.panel : (ST.panel[opts.style] ? opts.style : 'silver'),
    caps: ST.caps[opts.caps] ? opts.caps : (nat.caps || 'block'),
    capColor: ST.capColor[opts.capColor] ? opts.capColor : (nat.capColor || 'black'),
  };
  gradDef('fbPlateSilver', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#d8d8d4'], ['.5', '#c6c6c1'], ['1', '#adada7']]);
  gradDef('fbPlateStudio', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#221f1c'], ['1', '#131110']]);
  gradDef('sfChrome', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#f0efec'], ['.45', '#c4c1b9'], ['1', '#75726a']]);
  gradDef('fbCapBlack', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#2a2724'], ['1', '#171412']]);
  gradDef('fbCapCream', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#f2ecd8'], ['1', '#cfc8ae']]);
  const s = stageSvg(host, 'rsvg', 250, 112);
  const y0 = 20, y1 = 92, x0 = 36, dx = (214 - x0) / (freqs.length - 1);
  const yOf = db => y0 + db / 60 * (y1 - y0);
  const caps = [];
  const place = i => caps[i].setAttribute('transform', `translate(0,${yOf(vals[i])})`);
  const drawCap = (g, kind, x) => {
    const c = ST.capColor[cur.capColor];
    if (kind === 'chrome') {
      svgEl(g, 'rect', { x: x - 6, y: -3.25, width: 12, height: 6.5, rx: .9, fill: c.body, stroke: c.edge, 'stroke-width': .6 });
      /* bare metal needs no painted stripe — chrome-on-chrome stays lineless */
      if (cur.capColor !== 'chrome')
        svgEl(g, 'line', { x1: x - 6, y1: 0, x2: x + 6, y2: 0, stroke: c.index, 'stroke-width': 1 });
      svgEl(g, 'line', { x1: x - 6, y1: 2, x2: x + 6, y2: 2, stroke: c.rib, 'stroke-width': .5 });
    } else if (kind === 'ribbed') {
      svgEl(g, 'rect', { x: x - 5, y: -4, width: 10, height: 8, rx: 1, fill: c.body, stroke: c.edge, 'stroke-width': .6 });
      for (const dy of [-2.4, 2.4])
        svgEl(g, 'line', { x1: x - 4, y1: dy, x2: x + 4, y2: dy, stroke: c.rib, 'stroke-width': .6 });
      svgEl(g, 'line', { x1: x - 5, y1: 0, x2: x + 5, y2: 0, stroke: c.index, 'stroke-width': 1.1 });
    } else { /* block — tall ribbed fader after the Zaxcom Oasis; fine rib
      groups above and below a mid-cap index line that marks the value */
      svgEl(g, 'rect', { x: x - 4.5, y: -8, width: 9, height: 16, rx: 1.1, fill: c.body, stroke: c.edge, 'stroke-width': .6 });
      for (const dy of [-6.4, -4.8, -3.2, -1.6, 1.6, 3.2, 4.8, 6.4])
        svgEl(g, 'line', { x1: x - 3.7, y1: dy, x2: x + 3.7, y2: dy, stroke: c.rib, 'stroke-width': .6 });
      svgEl(g, 'line', { x1: x - 4.5, y1: 0, x2: x + 4.5, y2: 0, stroke: c.index, 'stroke-width': 1.2 });
    }
  };
  const set = (i, db) => {
    db = Math.max(0, Math.min(60, db)); vals[i] = db; place(i);
    onChange({ band: i, hz: freqs[i], db }, `${fmtHz(freqs[i])} Hz · −${Math.round(db)} dB`);
  };
  const render = () => {
    const st = ST.panel[cur.panel];
    s.replaceChildren(); caps.length = 0;
    svgEl(s, 'rect', { x: 1.5, y: 1.5, width: 247, height: 109, rx: 5, fill: st.plate, stroke: st.edge, 'stroke-width': 1 });
    svgEl(s, 'rect', { x: 3, y: 3, width: 244, height: 106, rx: 4, fill: 'none', stroke: st.bevel, 'stroke-width': .7 });
    [[9, 9], [241, 9], [9, 103], [241, 103]].forEach(([sx, sy], k) => {
      svgEl(s, 'circle', { cx: sx, cy: sy, r: 2.7, fill: st.screw, stroke: 'rgba(0,0,0,.55)', 'stroke-width': .6 });
      svgEl(s, 'line', { x1: sx - 1.9, y1: sy, x2: sx + 1.9, y2: sy, stroke: 'rgba(0,0,0,.6)', 'stroke-width': .7, transform: `rotate(${25 + k * 40},${sx},${sy})` });
    });
    for (let db = 0; db <= 60; db += 10) {
      const y = yOf(db), major = db % 20 === 0, len = major ? 4 : 2.5;
      svgEl(s, 'line', { x1: 24 - len, y1: y, x2: 24, y2: y, stroke: st.dim, 'stroke-width': major ? .9 : .6 });
      svgEl(s, 'line', { x1: 226, y1: y, x2: 226 + len, y2: y, stroke: st.dim, 'stroke-width': major ? .9 : .6 });
      if (major) {
        svgEl(s, 'text', { x: 17, y: y + 2, 'text-anchor': 'end', 'font-size': 5.2, 'font-family': 'var(--mono)', fill: st.ink }).textContent = db;
        svgEl(s, 'text', { x: 233, y: y + 2, 'text-anchor': 'start', 'font-size': 5.2, 'font-family': 'var(--mono)', fill: st.ink }).textContent = db;
      }
    }
    svgEl(s, 'text', { x: 20, y: 100, 'text-anchor': 'end', 'font-size': 4.6, 'font-family': 'var(--mono)', fill: st.dim }).textContent = 'dB';
    freqs.forEach((f, i) => {
      const x = x0 + i * dx;
      svgEl(s, 'text', { x, y: 13, 'text-anchor': 'middle', 'font-size': 4.6, 'font-family': 'var(--mono)', fill: st.ink }).textContent = fmtHz(f);
      svgEl(s, 'line', { x1: x, y1: y0, x2: x, y2: y1, stroke: st.track, 'stroke-width': st.trackW, 'stroke-linecap': 'round' });
      if (st.trackHi) svgEl(s, 'line', { x1: x - st.trackW / 2 - .35, y1: y0, x2: x - st.trackW / 2 - .35, y2: y1, stroke: st.trackHi, 'stroke-width': .7 });
      const cap = svgEl(s, 'g', {});
      drawCap(cap, cur.caps, x);
      caps.push(cap); place(i);
      const hit = svgEl(s, 'rect', { x: x - dx / 2, y: y0 - 6, width: dx, height: y1 - y0 + 12, fill: 'transparent' });
      hit.style.cursor = 'ns-resize';
      dragY(hit, pct => set(i, (100 - pct) / 100 * 60));
    });
  };
  const setStyle = (axis, name) => {
    if (!ST[axis] || !ST[axis][name]) return;
    cur[axis] = name; render();
  };
  render();
  onChange(null, 'drag a band');
  return { el: s, get: () => vals.slice(), set, setStyle };
};
/* named styles per axis: dot = swatch color for pickers. caps is the cap
   shape; capColor is the cap finish (body + rib + index line), applicable to
   any shape. */
GW.filterBank.STYLES = {
  panel: {
    silver: { dot: '#c9c9c5', plate: 'url(#fbPlateSilver)', edge: '#8e8e88', bevel: 'rgba(255,255,255,.4)', ink: '#33332f', dim: '#5c5c56', screw: '#9c9c96', track: '#121210', trackW: 2.0, trackHi: null },
    studio: { dot: '#1c1a18', plate: 'url(#fbPlateStudio)', edge: '#000', bevel: 'rgba(255,255,255,.06)', ink: '#b9b4a6', dim: '#6f6a5e', screw: '#3c3832', track: '#050505', trackW: 2.2, trackHi: 'rgba(255,255,255,.05)' },
  },
  caps: {
    block: { dot: '#2c2824' },
    ribbed: { dot: '#6f6a5e' },
    chrome: { dot: '#dfe6f2' },
  },
  capColor: {
    black: { dot: '#211e1b', body: 'url(#fbCapBlack)', rib: 'rgba(255,255,255,.16)', index: '#f2f4f2', edge: '#000' },
    red: { dot: 'var(--sevred)', body: 'url(#fbCapBlack)', rib: 'rgba(255,255,255,.16)', index: 'var(--sevred)', edge: '#000' },
    green: { dot: 'var(--sevgrn)', body: 'url(#fbCapBlack)', rib: 'rgba(255,255,255,.16)', index: 'var(--sevgrn)', edge: '#000' },
    blue: { dot: '#4f9fe0', body: 'url(#fbCapBlack)', rib: 'rgba(255,255,255,.16)', index: '#4f9fe0', edge: '#000' },
    amber: { dot: 'var(--gold-hi)', body: 'url(#fbCapBlack)', rib: 'rgba(255,255,255,.16)', index: 'var(--gold-hi)', edge: '#000' },
    chrome: { dot: '#dfe6f2', body: 'url(#sfChrome)', rib: 'rgba(0,0,0,.28)', index: '#14110e', edge: '#3c3a34' },
    cream: { dot: '#efe9d4', body: 'url(#fbCapCream)', rib: 'rgba(0,0,0,.18)', index: '#3a3128', edge: '#8a8474' },
  },
};

/* R06 chicken-head selector — tapered lever aims at the position */
GW.chickenHead = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const items = opts.items || [['OFF', -60], ['LO', -20], ['MID', 20], ['HI', 60]];
  const s = stageSvg(host, 'rsvg press', 110, 96), cx = 55, cy = 58;
  gradDef('chickG', 'radialGradient', { cx: '42%', cy: '34%', r: '80%' }, [['0', '#35312b'], ['1', '#070606']]);
  const lbls = [];
  items.forEach(([lbl, a]) => {
    const [tx, ty] = polar(cx, cy, 42, a);
    const t = svgEl(s, 'text', { x: tx, y: ty + 2.5, 'text-anchor': 'middle', 'font-size': 6.5, 'letter-spacing': '.06em', 'font-family': 'var(--mono)', fill: 'var(--dim)' });
    t.textContent = lbl; lbls.push(t);
    const [mx1, my1] = polar(cx, cy, 33, a), [mx2, my2] = polar(cx, cy, 29, a);
    svgEl(s, 'line', { x1: mx1, y1: my1, x2: mx2, y2: my2, stroke: 'var(--steel)', 'stroke-width': 1.2 });
  });
  svgEl(s, 'circle', { cx, cy, r: 12, fill: '#0c0b0a' });
  const lever = svgEl(s, 'g', {});
  svgEl(lever, 'path', { d: `M ${cx} ${cy - 29} L ${cx + 8.5} ${cy - 4} Q ${cx + 9} ${cy + 8} ${cx + 5} ${cy + 11} A 7 7 0 0 1 ${cx - 5} ${cy + 11} Q ${cx - 9} ${cy + 8} ${cx - 8.5} ${cy - 4} Z`, fill: 'url(#chickG)', stroke: '#000', 'stroke-width': .7 });
  svgEl(lever, 'line', { x1: cx, y1: cy - 26, x2: cx, y2: cy + 6, stroke: '#4a463e', 'stroke-width': 1.4, 'stroke-linecap': 'round' });
  lever.style.transformOrigin = `${cx}px ${cy}px`; lever.style.transition = 'transform .12s';
  let idx;
  const set = i => {
    idx = ((i % items.length) + items.length) % items.length;
    lever.style.transform = `rotate(${items[idx][1]}deg)`;
    lbls.forEach((t, k) => t.setAttribute('fill', k === idx ? 'var(--gold-hi)' : 'var(--dim)'));
    onChange(idx, items[idx][0]);
  };
  s.addEventListener('click', () => set(idx + 1));
  set(opts.index !== undefined ? opts.index : 2);
  return { el: s, get: () => idx, set };
};

/* R12 chrome slot fader — engraved dB scale, chrome T-handle in a screwed plate */
GW.slotFader = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 90, 150), cx = 45, yTop = 30, yBot = 120;
  const yOf = db => yTop + (12 - db) / 36 * (yBot - yTop);
  gradDef('sfPlate', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 1 }, [['0', '#242019'], ['1', '#131110']]);
  gradDef('sfChrome', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#f0efec'], ['.45', '#c4c1b9'], ['1', '#75726a']]);
  gradDef('sfScrew', 'radialGradient', { cx: '40%', cy: '35%', r: '75%' }, [['0', '#9b968a'], ['1', '#4a463e']]);
  svgEl(s, 'rect', { x: 14, y: 8, width: 62, height: 134, rx: 6, fill: 'url(#sfPlate)', stroke: '#0a0908', 'stroke-width': 1.5 });
  svgEl(s, 'rect', { x: 15.5, y: 9.5, width: 59, height: 131, rx: 5, fill: 'none', stroke: 'rgba(255,255,255,.05)', 'stroke-width': 1 });
  for (const sy of [16, 134]) {
    svgEl(s, 'circle', { cx, cy: sy, r: 3.2, fill: 'url(#sfScrew)', stroke: '#14110e', 'stroke-width': .6 });
    const [x1, y1] = polar(cx, sy, 3, 112), [x2, y2] = polar(cx, sy, 3, 292);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: '#221f1a', 'stroke-width': 1 });
  }
  svgEl(s, 'rect', { x: 40.5, y: yTop - 4, width: 9, height: yBot - yTop + 8, rx: 4, fill: '#0b0a09', stroke: '#050404' });
  for (const db of [12, 8, 4, 0, -4, -8, -12, -16, -20, -24]) {
    const y = yOf(db);
    svgEl(s, 'line', { x1: 26, y1: y, x2: 39, y2: y, stroke: 'var(--steel)', 'stroke-width': db === 0 ? 1.3 : .8, opacity: db === 0 ? 1 : .75 });
    svgEl(s, 'line', { x1: 51, y1: y, x2: 64, y2: y, stroke: 'var(--steel)', 'stroke-width': db === 0 ? 1.3 : .8, opacity: db === 0 ? 1 : .75 });
    svgEl(s, 'text', { x: 23, y: y + 2.2, 'text-anchor': 'end', 'font-size': 6, 'font-family': 'var(--mono)', fill: db === 0 ? 'var(--cream)' : 'var(--steel)' }).textContent = Math.abs(db);
  }
  const handle = svgEl(s, 'g', {});
  svgEl(handle, 'polygon', { points: '45,0 58,-5 58,5', fill: '#b9b6ae', stroke: '#5e5a52', 'stroke-width': .5 });
  svgEl(handle, 'rect', { x: 58, y: -7, width: 22, height: 14, rx: 3.5, fill: 'url(#sfChrome)', stroke: '#4e4a42', 'stroke-width': .6 });
  svgEl(handle, 'rect', { x: 60, y: -5.2, width: 18, height: 2.2, rx: 1, fill: 'rgba(255,255,255,.4)' });
  let db;
  const set = v => {
    db = Math.max(-24, Math.min(12, v));
    handle.setAttribute('transform', `translate(0,${30 + (12 - db) / 36 * 90})`);
    onChange(db, (db > 0 ? '+' : db < 0 ? '−' : '') + Math.abs(db).toFixed(1) + ' dB');
  };
  dragY(s, pct => set(-24 + pct / 100 * 36));
  set(opts.value !== undefined ? opts.value : -4);
  return { el: s, get: () => db, set };
};

/* R14 spade-pointer tuning knob — engraved relief arc, knurl ring turns with it */
GW.spadeKnob = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 140, 124), cx = 70, cy = 82;
  const sweep = v => -80 + v / 10 * 160;
  gradDef('spadeKnob', 'radialGradient', { cx: '42%', cy: '34%', r: '80%' }, [['0', '#33302a'], ['1', '#080706']]);
  gradDef('spadeMetal', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 1 }, [['0', '#e9e7e0'], ['1', '#8d897f']]);
  /* engraved arc: every stroke carries a faint light twin offset below (incised relief) */
  const engrave = (x1, y1, x2, y2, w) => {
    svgEl(s, 'line', { x1, y1: y1 + .8, x2, y2: y2 + .8, stroke: 'rgba(255,255,255,.13)', 'stroke-width': w });
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: '#050404', 'stroke-width': w });
  };
  for (let i = 0; i <= 40; i++) {
    const v = i / 4, a = sweep(v), major = i % 4 === 0;
    const [x1, y1] = polar(cx, cy, major ? 50 : 52, a), [x2, y2] = polar(cx, cy, 58, a);
    engrave(x1, y1, x2, y2, major ? 1.6 : .9);
    if (major) {
      const [nx, ny] = polar(cx, cy, 65, a);
      svgEl(s, 'text', { x: nx, y: ny + 3.2, 'text-anchor': 'middle', 'font-size': 7.5, 'font-family': 'var(--mono)', fill: 'rgba(255,255,255,.13)' }).textContent = v;
      svgEl(s, 'text', { x: nx, y: ny + 2.4, 'text-anchor': 'middle', 'font-size': 7.5, 'font-family': 'var(--mono)', fill: '#0a0908' }).textContent = v;
    }
  }
  const grp = svgEl(s, 'g', {});
  svgEl(grp, 'path', { d: `M ${cx - 2} ${cy - 28} L ${cx - 4.5} ${cy - 42} L ${cx} ${cy - 54} L ${cx + 4.5} ${cy - 42} L ${cx + 2} ${cy - 28} Z`, fill: 'url(#spadeMetal)', stroke: '#55524a', 'stroke-width': .6 });
  svgEl(grp, 'circle', { cx, cy, r: 30, fill: 'url(#spadeKnob)', stroke: '#000', 'stroke-width': .8 });
  svgEl(grp, 'circle', { cx, cy, r: 28.5, fill: 'none', stroke: '#0a0908', 'stroke-width': 3, 'stroke-dasharray': '2.2 2.2' });
  svgEl(grp, 'circle', { cx, cy, r: 22, fill: 'url(#spadeKnob)' });
  svgEl(grp, 'ellipse', { cx: cx - 8, cy: cy - 9, rx: 8, ry: 5, fill: 'rgba(255,255,255,.08)', transform: `rotate(-30,${cx - 8},${cy - 9})` });
  let val;
  const set = v => {
    val = Math.max(0, Math.min(10, v));
    grp.setAttribute('transform', `rotate(${-80 + val / 10 * 160},70,82)`);
    onChange(val, val.toFixed(1));
  };
  dragDelta(s, () => val, set, { min: 0, max: 10, sens: .05 });
  set(opts.value !== undefined ? opts.value : 8.3);
  return { el: s, get: () => val, set };
};

/* R15 multi-band dial — nested arcs, one needle; the bandspread dial selects the ring */
GW.multiBandDial = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const ranges = opts.ranges || [[0.54, 1.6], [1.6, 5.1], [5.1, 15.5], [15.5, 30.5]];
  const s = stageSvg(host, 'rsvg', 190, 110), cx = 62, cy = 62;
  const sweep = t => -70 + t * 140;
  gradDef('mbFace', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 1 }, [['0', '#eee5c8'], ['1', '#dcd2ae']]);
  gradDef('spadeKnob', 'radialGradient', { cx: '42%', cy: '34%', r: '80%' }, [['0', '#33302a'], ['1', '#080706']]);
  svgEl(s, 'rect', { x: 4, y: 4, width: 182, height: 102, rx: 12, fill: '#171412', stroke: '#060505' });
  svgEl(s, 'rect', { x: 9, y: 9, width: 172, height: 92, rx: 9, fill: 'url(#mbFace)', stroke: '#0a0908' });
  const INK = '#2c2318';
  const rings = [];
  [18, 26, 34, 42].forEach(r => {
    const ring = svgEl(s, 'g', {});
    const [x1, y1] = polar(cx, cy, r, -70), [x2, y2] = polar(cx, cy, r, 70);
    svgEl(ring, 'path', { d: `M ${x1} ${y1} A ${r} ${r} 0 0 1 ${x2} ${y2}`, fill: 'none', stroke: INK, 'stroke-width': .9 });
    for (let i = 0; i <= 8; i++) {
      const a = sweep(i / 8), [tx1, ty1] = polar(cx, cy, r, a), [tx2, ty2] = polar(cx, cy, r + 3, a);
      svgEl(ring, 'line', { x1: tx1, y1: ty1, x2: tx2, y2: ty2, stroke: INK, 'stroke-width': .8 });
    }
    rings.push(ring);
  });
  const needle = svgEl(s, 'line', { x1: cx, y1: cy, x2: cx, y2: cy - 46, stroke: '#1a1613', 'stroke-width': 1.6, 'stroke-linecap': 'round' });
  svgEl(s, 'circle', { cx, cy, r: 7, fill: 'url(#spadeKnob)', stroke: '#000', 'stroke-width': .6 });
  svgEl(s, 'text', { x: 14, y: 100, 'font-size': 5, 'letter-spacing': '.12em', 'font-family': 'var(--mono)', fill: INK, opacity: .8 }).textContent = 'MEGACYCLES';
  /* bandspread dial (click = band select) */
  const bx = 142, by = 56;
  for (let i = 0; i < 12; i++) { const a = i * 30, [x1, y1] = polar(bx, by, 24, a), [x2, y2] = polar(bx, by, 21, a); svgEl(s, 'line', { x1, y1, x2, y2, stroke: INK, 'stroke-width': .8 }); }
  svgEl(s, 'circle', { cx: bx, cy: by, r: 17, fill: 'none', stroke: INK, 'stroke-width': .7, opacity: .5 });
  const spread = svgEl(s, 'line', { x1: bx, y1: by, x2: bx, y2: by - 22, stroke: '#1a1613', 'stroke-width': 1.4, 'stroke-linecap': 'round' });
  svgEl(s, 'circle', { cx: bx, cy: by, r: 6, fill: 'url(#spadeKnob)', stroke: '#000', 'stroke-width': .6 });
  svgEl(s, 'text', { x: bx, y: 96, 'text-anchor': 'middle', 'font-size': 5, 'letter-spacing': '.12em', 'font-family': 'var(--mono)', fill: INK, opacity: .8 }).textContent = 'BANDSPREAD';
  let val, band;
  const set = (v, b) => {
    val = Math.max(0, Math.min(100, v)); band = b;
    needle.setAttribute('transform', `rotate(${-70 + val / 100 * 140},62,62)`);
    spread.setAttribute('transform', `rotate(${-45 + b * 30},142,56)`);
    rings.forEach((g, i) => g.setAttribute('opacity', i === b ? '1' : '.4'));
    const [lo, hi] = ranges[b]; const mc = lo + val / 100 * (hi - lo);
    onChange({ band: b, mc }, `B${b + 1} · ${mc.toFixed(2)} Mc`);
  };
  const dragHit = svgEl(s, 'rect', { x: 9, y: 9, width: 100, height: 92, fill: 'transparent' });
  dragHit.style.cursor = 'ns-resize';
  dragDelta(dragHit, () => val, v => set(v, band), { min: 0, max: 100 });
  const clickHit = svgEl(s, 'rect', { x: 112, y: 9, width: 69, height: 92, fill: 'transparent' });
  clickHit.style.cursor = 'pointer';
  clickHit.addEventListener('click', () => set(val, (band + 1) % ranges.length));
  set(opts.value !== undefined ? opts.value : 45, opts.band !== undefined ? opts.band : 2);
  return { el: s, get: () => [val, band], set };
};

/* R16 entry keypad — worn keys feed the amber display; lamps watch state */
GW.entryKeypad = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 150, 190);
  gradDef('kpKey', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#dbd8cf'], ['1', '#a29d92']]);
  gradDef('kpAmber', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', 'var(--amber-grad-top)'], ['1', 'var(--amber-grad-mid)']]);
  const lamp = cy => svgEl(s, 'circle', { cx: 13, cy, r: 6.5, fill: '#3a0f0a', stroke: '#14100e', 'stroke-width': 1.5 });
  const lampTop = lamp(20), lampBot = lamp(38);
  svgEl(s, 'rect', { x: 26, y: 8, width: 116, height: 32, rx: 5, fill: '#0a0806', stroke: '#2c261d', 'stroke-width': 2 });
  const disp = svgEl(s, 'text', { x: 84, y: 31, 'text-anchor': 'middle', 'font-size': 16, 'letter-spacing': '.22em', 'font-family': 'var(--mono)', fill: 'var(--gold-hi)' });
  svgEl(s, 'rect', { x: 24, y: 48, width: 118, height: 138, rx: 8, fill: '#1a1714', stroke: '#0a0908', 'stroke-width': 1.5 });
  let buf = '';
  const render = () => {
    disp.textContent = buf.padEnd(6, '–');
    lampTop.setAttribute('fill', buf ? 'var(--jewel-r)' : '#3a0f0a');
  };
  const press = k => {
    if (k === '✓') { onChange(buf, buf ? 'OK · ' + buf : 'empty'); buf = ''; render(); return; }
    if (k === '✗') {
      buf = ''; render(); onChange(buf, 'cleared');
      lampBot.setAttribute('fill', 'var(--jewel-r)');
      setTimeout(() => lampBot.setAttribute('fill', '#3a0f0a'), 350); return;
    }
    if (buf.length < 6) { buf += k; render(); onChange(buf, buf); }
  };
  const KEYS = [['1', '2', '3'], ['4', '5', '6'], ['7', '8', '9'], ['✓', '0', '✗']];
  const jitter = [-2, 1, -1, 2, 0, -2, 1, -1, 2, 0, -1, 1];
  KEYS.forEach((row, r) => row.forEach((k, c) => {
    const x = 47 + c * 36, y = 68 + r * 32, amber = (k === '✓' || k === '✗');
    const g = svgEl(s, 'g', {}); g.style.cursor = 'pointer'; g.style.transition = 'transform .07s';
    svgEl(g, 'rect', { x: x - 14, y: y - 11, width: 28, height: 24, rx: 4, fill: amber ? 'url(#kpAmber)' : 'url(#kpKey)', stroke: '#4e4a42', 'stroke-width': 1, 'stroke-opacity': .8 });
    svgEl(g, 'text', { x, y: y + 6, 'text-anchor': 'middle', 'font-size': 13, 'font-weight': 700, 'font-family': 'var(--mono)', fill: k === '✓' ? '#3f5a1f' : k === '✗' ? '#7a2a1a' : '#2b2721', transform: `rotate(${jitter[r * 3 + c]},${x},${y})` }).textContent = k;
    g.addEventListener('click', () => { g.style.transform = 'translateY(1.5px)'; setTimeout(() => g.style.transform = '', 80); press(k); });
  }));
  render(); onChange('', 'enter a code');
  return { el: s, get: () => buf, press };
};

/* R18 thumb-slide attenuator pair — lit numeral strip, cream side tab */
GW.thumbSlide = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const chans = (opts.channels || [{ name: 'BLEND', v: 74 }, { name: 'MIX', v: 92 }]).map(c => ({ name: c.name, v: c.v }));
  const s = stageSvg(host, 'rsvg', 130, 150), y0 = 22, y1 = 122;
  gradDef('thRail', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 0 }, [['0', '#3a3733'], ['.5', '#211f1c'], ['1', '#161412']]);
  gradDef('thTab', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#f2efe6'], ['1', '#c6c1b3']]);
  gradDef('sfScrew', 'radialGradient', { cx: '40%', cy: '35%', r: '75%' }, [['0', '#9b968a'], ['1', '#4a463e']]);
  const parts = [];
  const set = (i, v) => {
    v = Math.max(0, Math.min(100, Math.round(v))); chans[i].v = v;
    const p = parts[i];
    p.tab.setAttribute('transform', `translate(0,${28 + (100 - v) * 0.88})`);
    p.nums.forEach(t => {
      const on = Math.abs(parseInt(t.textContent) - v) <= 5;
      t.setAttribute('fill', on ? 'var(--gold-hi)' : 'var(--gold)'); t.setAttribute('opacity', on ? '1' : '.55');
    });
    onChange(chans.map(c => c.v), `${chans[0].name} ${chans[0].v} · ${chans[1].name} ${chans[1].v}`);
  };
  chans.forEach((ch, i) => {
    const x = 40 + i * 50;
    svgEl(s, 'rect', { x: x - 9, y: y0 - 10, width: 18, height: y1 - y0 + 20, rx: 3, fill: 'url(#thRail)', stroke: '#0a0908', 'stroke-width': 1.2 });
    for (const sy of [y0 - 6, y1 + 6]) {
      svgEl(s, 'circle', { cx: x, cy: sy, r: 2.4, fill: 'url(#sfScrew)', stroke: '#0a0908', 'stroke-width': .5 });
      svgEl(s, 'line', { x1: x - 1.8, y1: sy - 1, x2: x + 1.8, y2: sy + 1, stroke: '#14110e', 'stroke-width': .8 });
    }
    svgEl(s, 'rect', { x: x - 5, y: y0, width: 10, height: y1 - y0, fill: '#0d0a08', stroke: '#050404' });
    const nums = [];
    for (let n = 0; n <= 10; n++) {
      const val = 100 - n * 10, y = y0 + 6 + n * (y1 - y0 - 12) / 10;
      const t = svgEl(s, 'text', { x, y: y + 2, 'text-anchor': 'middle', 'font-size': 5.5, 'font-family': 'var(--mono)', fill: 'var(--gold)', opacity: .55 });
      t.textContent = val; nums.push(t);
    }
    const tab = svgEl(s, 'g', {});
    svgEl(tab, 'rect', { x: x + 7, y: -6, width: 8, height: 12, rx: 2, fill: 'url(#thTab)', stroke: '#7a766a', 'stroke-width': .6 });
    svgEl(tab, 'rect', { x: x + 8.2, y: -1, width: 5.6, height: 1.6, fill: 'rgba(0,0,0,.25)' });
    svgEl(s, 'text', { x, y: 145, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.14em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = ch.name;
    const hit = svgEl(s, 'rect', { x: x - 12, y: y0 - 10, width: 30, height: y1 - y0 + 20, fill: 'transparent' });
    hit.style.cursor = 'ns-resize';
    parts.push({ tab, nums });
    dragY(hit, pct => set(i, pct));
  });
  set(0, chans[0].v); set(1, chans[1].v);
  return { el: s, get: () => chans.map(c => c.v), set };
};

/* R19 waveform region editor — monochrome LCD, draggable S/E flags */
GW.waveRegion = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 190, 100), x0 = 10, x1 = 180, yMid = 48, N = 85;
  svgEl(s, 'rect', { x: 1, y: 1, width: 188, height: 98, rx: 6, fill: 'var(--scr-bg1,#0b0c0b)', stroke: 'var(--scr-brd,#2a2c2a)', 'stroke-width': 2 });
  svgEl(s, 'text', { x: 12, y: 13, 'font-size': 7, 'font-family': 'var(--mono)', fill: 'var(--scr-hi,#e8eae8)' }).textContent = 'C1:START';
  svgEl(s, 'text', { x: 78, y: 13, 'font-size': 7, 'font-family': 'var(--mono)', fill: 'var(--scr-hi,#e8eae8)' }).textContent = 'C2:OFF';
  svgEl(s, 'text', { x: 136, y: 13, 'font-size': 7, 'font-family': 'var(--mono)', fill: 'var(--scr-hi,#e8eae8)' }).textContent = 'C3:END';
  svgEl(s, 'line', { x1: x0, y1: yMid, x2: x1, y2: yMid, stroke: '#3a3c3a', 'stroke-width': .6, 'stroke-dasharray': '1.5 2' });
  const bars = [];
  for (let i = 0; i < N; i++) {
    const x = x0 + (i / (N - 1)) * (x1 - x0);
    const env = Math.abs(Math.sin(i * 0.19)) * Math.abs(Math.sin(i * 0.045)) * (i % 17 < 11 ? 1 : .25);
    const h = Math.max(1.2, env * 26);
    bars.push(svgEl(s, 'rect', { x: x - 0.8, y: yMid - h, width: 1.6, height: h * 2, fill: 'var(--scr-dim,#5a5c5a)' }));
  }
  const flag = lbl => {
    const g = svgEl(s, 'g', {});
    svgEl(g, 'line', { x1: 0, y1: 18, x2: 0, y2: 78, stroke: 'var(--scr-hi,#f2f4f2)', 'stroke-width': 1 });
    svgEl(g, 'rect', { x: lbl === 'S' ? 0 : -8, y: 70, width: 8, height: 8, fill: 'var(--scr-hi,#f2f4f2)' });
    svgEl(g, 'text', { x: lbl === 'S' ? 4 : -4, y: 76.5, 'text-anchor': 'middle', 'font-size': 6.5, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--scr-bg1,#0b0c0b)' }).textContent = lbl;
    return g;
  };
  const flagS = flag('S'), flagE = flag('E');
  svgEl(s, 'rect', { x: 10, y: 84, width: 78, height: 11, fill: 'var(--scr-hi,#e8eae8)' });
  svgEl(s, 'text', { x: 14, y: 92.5, 'font-size': 6.5, 'font-family': 'var(--mono)', fill: 'var(--scr-bg1,#0b0c0b)' }).textContent = 'ENC:ZOOM(1x)';
  svgEl(s, 'text', { x: 96, y: 92.5, 'font-size': 6.5, 'font-family': 'var(--mono)', fill: 'var(--scr-hi,#e8eae8)' }).textContent = 'A-3 M:[S]';
  svgEl(s, 'rect', { x: 148, y: 84, width: 32, height: 11, fill: 'var(--scr-hi,#e8eae8)' });
  svgEl(s, 'text', { x: 164, y: 92.5, 'text-anchor': 'middle', 'font-size': 6.5, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--scr-bg1,#0b0c0b)' }).textContent = 'MENU';
  s.style.cursor = 'ew-resize';
  let S, E;
  const set = (sv, ev) => {
    S = Math.max(0, Math.min(96, sv)); E = Math.max(4, Math.min(100, ev));
    const xOf = p => x0 + p / 100 * (x1 - x0);
    flagS.setAttribute('transform', `translate(${xOf(S)},0)`);
    flagE.setAttribute('transform', `translate(${xOf(E)},0)`);
    bars.forEach((b, i) => {
      const p = i / (bars.length - 1) * 100;
      b.setAttribute('fill', (p >= S && p <= E) ? 'var(--scr-hi,#f2f4f2)' : 'var(--scr-dim,#5a5c5a)');
    });
    onChange({ s: S, e: E }, `S ${Math.round(S)}% · E ${Math.round(E)}%`);
  };
  dragX(s, pct => {
    /* move whichever flag is nearer the pointer */
    if (Math.abs(pct - S) <= Math.abs(pct - E)) set(Math.min(pct, E - 4), E);
    else set(S, Math.max(pct, S + 4));
  });
  set(opts.start !== undefined ? opts.start : 22, opts.end !== undefined ? opts.end : 76);
  return { el: s, get: () => ({ s: S, e: E }), set };
};

/* R20 drum roller selector — numbered paper drum in a window, center chip reads it */
GW.drumRoller = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const chans = (opts.channels || [{ name: 'HIGH', v: 6 }, { name: 'LOW', v: 8 }]).map(c => ({ name: c.name, v: c.v }));
  const s = stageSvg(host, 'rsvg', 130, 140), cy = 76, step = 17;
  gradDef('thRail', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 0 }, [['0', '#3a3733'], ['.5', '#211f1c'], ['1', '#161412']]);
  gradDef('drPaper', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 0 }, [['0', '#cfc6a8'], ['.5', '#ece4c8'], ['1', '#c6bd9e']]);
  gradDef('drCurve', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', 'rgba(0,0,0,.4)'], ['.28', 'rgba(0,0,0,0)'], ['.72', 'rgba(0,0,0,0)'], ['1', 'rgba(0,0,0,.4)']]);
  const localDefs = svgEl(s, 'defs', {});
  svgEl(s, 'text', { x: 65, y: 12, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.18em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = opts.title || 'EQUALIZER';
  const grps = [];
  const set = (i, v) => {
    v = Math.max(1, Math.min(10, v)); chans[i].v = v;
    const p = grps[i];
    p.nums.style.transform = `translateY(${(v - p.base) * step}px)`;
    p.chip.textContent = Math.round(v);
    onChange(chans.map(c => c.v), `${chans[0].name} ${Math.round(chans[0].v)} · ${chans[1].name} ${Math.round(chans[1].v)}`);
  };
  chans.forEach((ch, i) => {
    const x = 45 + i * 50, cid = uid('drClip');
    svgEl(s, 'text', { x: x + 18, y: 34, 'text-anchor': 'middle', 'font-size': 8, fill: 'var(--steel)' }).textContent = '+';
    svgEl(s, 'text', { x: x + 18, y: 124, 'text-anchor': 'middle', 'font-size': 8, fill: 'var(--steel)' }).textContent = '−';
    svgEl(s, 'rect', { x: x - 12, y: 24, width: 24, height: 104, rx: 4, fill: 'url(#thRail)', stroke: '#0a0908', 'stroke-width': 1.2 });
    const clip = svgEl(localDefs, 'clipPath', { id: cid });
    svgEl(clip, 'rect', { x: x - 9, y: 28, width: 18, height: 96 });
    svgEl(s, 'rect', { x: x - 9, y: 28, width: 18, height: 96, fill: 'url(#drPaper)' });
    const g = svgEl(s, 'g', { 'clip-path': `url(#${cid})` });
    const nums = svgEl(g, 'g', {}); nums.style.transition = 'transform .12s';
    for (let n = 1; n <= 10; n++)
      svgEl(nums, 'text', { x, y: cy + 3 + (ch.v - n) * step, 'text-anchor': 'middle', 'font-size': 9, 'font-weight': 700, 'font-family': 'var(--mono)', fill: '#2b2418' }).textContent = n;
    svgEl(g, 'rect', { x: x - 9, y: 28, width: 18, height: 96, fill: 'url(#drCurve)', 'pointer-events': 'none' });
    svgEl(s, 'rect', { x: x - 8, y: cy - 6.5, width: 16, height: 13, rx: 1.5, fill: '#1a1613', opacity: .92 });
    const chip = svgEl(s, 'text', { x, y: cy + 3, 'text-anchor': 'middle', 'font-size': 9, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' });
    svgEl(s, 'text', { x, y: 136, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.12em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = ch.name;
    const hit = svgEl(s, 'rect', { x: x - 14, y: 24, width: 28, height: 104, fill: 'transparent' });
    hit.style.cursor = 'ns-resize';
    grps.push({ nums, chip, base: ch.v });
    dragDelta(hit, () => chans[i].v, v => set(i, v), { min: 1, max: 10, sens: .08 });
  });
  set(0, chans[0].v); set(1, chans[1].v);
  return { el: s, get: () => chans.map(c => c.v), set };
};

/* R21 LED program row — exclusive select, the LED above the key carries the state */
GW.ledRow = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const items = opts.items || ['Sm Hall B', 'VocPlate', 'Lg Hall B', 'Chamber', 'ParcPlate', 'Sm Hall A', 'Room A', 'Const Plate'];
  const s = stageSvg(host, 'rsvg', 190, 58);
  gradDef('lrKey', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#2b2823'], ['1', '#171512']]);
  const leds = [];
  let idx;
  const set = i => {
    idx = i;
    leds.forEach((l, k) => {
      const on = k === i;
      l.setAttribute('fill', on ? 'var(--jewel-r)' : '#3a0f0a');
      l.setAttribute('style', on ? 'filter:drop-shadow(0 0 3px rgba(255,91,69,.8))' : '');
    });
    onChange(idx, `${idx + 1} · ${items[idx]}`);
  };
  items.forEach((_, i) => {
    const x = 16 + i * 22.6;
    svgEl(s, 'text', { x, y: 9, 'text-anchor': 'middle', 'font-size': 6, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = i + 1;
    leds.push(svgEl(s, 'circle', { cx: x, cy: 17, r: 2.4, fill: '#3a0f0a' }));
    const g = svgEl(s, 'g', {}); g.style.cursor = 'pointer'; g.style.transition = 'transform .07s';
    svgEl(g, 'rect', { x: x - 8.5, y: 24, width: 17, height: 22, rx: 2.5, fill: 'url(#lrKey)', stroke: '#0a0908', 'stroke-width': 1 });
    svgEl(g, 'rect', { x: x - 6.5, y: 26.5, width: 13, height: 3, rx: 1.5, fill: 'rgba(255,255,255,.06)' });
    g.addEventListener('click', () => { g.style.transform = 'translateY(1.5px)'; setTimeout(() => g.style.transform = '', 80); set(i); });
  });
  svgEl(s, 'text', { x: 95, y: 56, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.16em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = opts.label || 'PROGRAM';
  set(opts.index !== undefined ? opts.index : 5);
  return { el: s, get: () => idx, set };
};

/* R22 three-position slide — chrome pill between detents, honest LED pair */
GW.pillSlide = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const positions = opts.positions || ['A', 'AB', 'B'];
  const s = stageSvg(host, 'rsvg press', 110, 64), detX = [34, 55, 76];
  gradDef('sfChrome', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#f0efec'], ['.45', '#c4c1b9'], ['1', '#75726a']]);
  svgEl(s, 'text', { x: 55, y: 10, 'text-anchor': 'middle', 'font-size': 5.5, 'letter-spacing': '.16em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = opts.title || 'BASIC · VARIATION';
  svgEl(s, 'rect', { x: 20, y: 16, width: 70, height: 14, rx: 7, fill: '#0b0a09', stroke: '#000', 'stroke-width': 1 });
  svgEl(s, 'rect', { x: 21, y: 17, width: 68, height: 5, rx: 2.5, fill: 'rgba(255,255,255,.04)' });
  const pill = svgEl(s, 'rect', { x: -13, y: 18.5, width: 26, height: 9, rx: 4.5, fill: 'url(#sfChrome)', stroke: '#4e4a42', 'stroke-width': .6 });
  pill.style.transition = 'transform .12s';
  const lbls = positions.map((lbl, i) => {
    const t = svgEl(s, 'text', { x: detX[i], y: 40, 'text-anchor': 'middle', 'font-size': 6.5, 'font-family': 'var(--mono)', fill: 'var(--dim)' });
    t.textContent = lbl; return t;
  });
  svgEl(s, 'rect', { x: 32, y: 45, width: 46, height: 11, rx: 2, fill: '#141210', stroke: '#060505' });
  const leds = [44, 66].map(x => svgEl(s, 'circle', { cx: x, cy: 50.5, r: 2.4, fill: '#3a0f0a' }));
  let idx;
  const set = i => {
    idx = i;
    pill.setAttribute('transform', `translate(${detX[i]},0)`);
    lbls.forEach((t, k) => t.setAttribute('fill', k === i ? 'var(--gold-hi)' : 'var(--dim)'));
    const lit = [i === 0 || i === 1, i === 2 || i === 1];
    leds.forEach((l, k) => l.setAttribute('fill', lit[k] ? 'var(--jewel-r)' : '#3a0f0a'));
    onChange(idx, positions[i]);
  };
  s.addEventListener('click', e => {
    const r = s.getBoundingClientRect();
    const x = (e.clientX - r.left) / r.width * 110;
    set(x < 45 ? 0 : x < 66 ? 1 : 2);
  });
  set(opts.index !== undefined ? opts.index : 1);
  return { el: s, get: () => idx, set };
};

/* R23 spun-aluminum knob — machined rings in a knurled grip, red index */
GW.spunKnob = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 110, 110), cx = 55, cy = 52;
  gradDef('spunFace', 'radialGradient', { cx: '42%', cy: '34%', r: '85%' }, [['0', '#e8e6e0'], ['.7', '#b3b0a8'], ['1', '#8a877e']]);
  for (let k = 0; k < 8; k++) { const [x, y] = polar(cx, cy, 45, -135 + k * 38.6); svgEl(s, 'circle', { cx: x, cy: y, r: 1.3, fill: 'var(--steel)' }); }
  for (let k = 0; k < 22; k++) { const [x, y] = polar(cx, cy, 36, k * 16.36); svgEl(s, 'circle', { cx: x, cy: y, r: 2.6, fill: '#14110e' }); }
  svgEl(s, 'circle', { cx, cy, r: 36, fill: '#1a1714', stroke: '#000', 'stroke-width': .8 });
  svgEl(s, 'circle', { cx, cy, r: 30, fill: 'url(#spunFace)', stroke: '#6e6b63', 'stroke-width': .8 });
  for (const r of [24, 18, 12, 6])
    svgEl(s, 'circle', { cx, cy, r, fill: 'none', stroke: r % 12 === 0 ? 'rgba(0,0,0,.12)' : 'rgba(255,255,255,.3)', 'stroke-width': .6 });
  const idx = svgEl(s, 'line', { x1: cx, y1: cy - 28, x2: cx, y2: cy - 10, stroke: 'var(--fail)', 'stroke-width': 2.6, 'stroke-linecap': 'round' });
  svgEl(s, 'ellipse', { cx: cx - 9, cy: cy - 11, rx: 9, ry: 5, fill: 'rgba(255,255,255,.28)', transform: `rotate(-32,${cx - 9},${cy - 11})` });
  svgEl(s, 'text', { x: cx, y: 103, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.16em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = opts.label || 'SPEED';
  let val;
  const set = v => {
    val = Math.max(0, Math.min(100, v));
    idx.setAttribute('transform', `rotate(${-135 + val / 100 * 270},${cx},${cy})`);
    onChange(val, Math.round(val) + '%');
  };
  dragDelta(s, () => val, set, { min: 0, max: 100 });
  set(opts.value !== undefined ? opts.value : 62);
  return { el: s, get: () => val, set };
};

/* R24 stomp switch + jewel — press to engage, the jewel reports */
GW.stompSwitch = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 110, 110), cx = 55;
  gradDef('stompDome', 'radialGradient', { cx: '40%', cy: '30%', r: '80%' }, [['0', '#f4f2ec'], ['.55', '#b9b6ae'], ['1', '#6e6b63']]);
  gradDef('stompJewel', 'radialGradient', { cx: '38%', cy: '30%', r: '80%' }, [['0', '#ffe9b0'], ['.45', 'var(--jewel-a)'], ['1', '#5c3d0c']]);
  def('avGlow', d => {
    const fl = svgEl(d, 'filter', { id: 'avGlow', x: '-60%', y: '-60%', width: '220%', height: '220%' });
    svgEl(fl, 'feGaussianBlur', { in: 'SourceGraphic', stdDeviation: 1.4 });
  });
  const glow = svgEl(s, 'circle', { cx, cy: 22, r: 14, fill: 'rgba(255,180,58,.35)', filter: 'url(#avGlow)', opacity: 0 });
  const jewel = svgEl(s, 'circle', { cx, cy: 22, r: 9, fill: '#241f1b', stroke: '#0a0908', 'stroke-width': 1.5 });
  for (let k = 0; k < 6; k++) {
    const a1 = k * 60, a2 = k * 60 + 30;
    const [x1, y1] = polar(cx, 22, 9, a1), [x2, y2] = polar(cx, 22, 9, a2);
    svgEl(s, 'path', { d: `M ${cx} 22 L ${x1} ${y1} A 9 9 0 0 1 ${x2} ${y2} Z`, fill: k % 2 ? 'rgba(255,255,255,.09)' : 'rgba(0,0,0,.10)', 'pointer-events': 'none' });
  }
  for (let k = 0; k < 20; k++) { const [x, y] = polar(cx, 72, 25, k * 18); svgEl(s, 'circle', { cx: x, cy: y, r: 2.4, fill: '#14110e' }); }
  svgEl(s, 'circle', { cx, cy: 72, r: 25, fill: '#1a1714', stroke: '#000', 'stroke-width': .8 });
  const dome = svgEl(s, 'g', {}); dome.style.transition = 'transform .08s';
  svgEl(dome, 'circle', { cx, cy: 72, r: 19, fill: 'url(#stompDome)', stroke: '#55524a', 'stroke-width': .8 });
  svgEl(dome, 'ellipse', { cx: cx - 6, cy: 64, rx: 8, ry: 4.5, fill: 'rgba(255,255,255,.5)', transform: `rotate(-24,${cx - 6},64)` });
  let on;
  const set = v => {
    on = !!v;
    jewel.setAttribute('fill', on ? 'url(#stompJewel)' : '#241f1b');
    glow.setAttribute('opacity', on ? '1' : '0');
    onChange(on, on ? 'ENGAGED' : 'bypass');
  };
  s.addEventListener('click', () => { dome.style.transform = 'translateY(1.5px)'; setTimeout(() => dome.style.transform = '', 90); set(!on); });
  set(opts.on !== undefined ? opts.on : false);
  return { el: s, get: () => on, set };
};

/* R27 winged gain selector — red T-bar over a dot ring, stepped detents */
GW.wingSelector = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const steps = opts.steps || [-80, -70, -60, -50, -40, -30, -20, -10, -5, 0, 5, 10];
  const s = stageSvg(host, 'rsvg drag', 110, 110), cx = 55, cy = 52;
  gradDef('wingRed', 'radialGradient', { cx: '40%', cy: '32%', r: '80%' }, [['0', '#d98a6f'], ['.6', 'var(--fail)'], ['1', '#6e2415']]);
  steps.forEach((db, i) => {
    const a = -135 + i / (steps.length - 1) * 270;
    const [dx, dy] = polar(cx, cy, 38, a);
    svgEl(s, 'circle', { cx: dx, cy: dy, r: 1.5, fill: 'var(--steel)' });
    if (i % 2 === 1 || db === 0 || db === 10 || db === -80) {
      const [tx, ty] = polar(cx, cy, 46.5, a);
      svgEl(s, 'text', { x: tx, y: ty + 2.2, 'text-anchor': 'middle', 'font-size': 5.5, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = db > 0 ? '+' + db : db;
    }
  });
  const grp = svgEl(s, 'g', {}); grp.style.transition = 'transform .09s';
  svgEl(grp, 'rect', { x: cx - 6.5, y: cy - 30, width: 13, height: 60, rx: 6, fill: 'url(#wingRed)', stroke: '#4e150a', 'stroke-width': .8 });
  svgEl(grp, 'circle', { cx, cy, r: 15, fill: 'url(#wingRed)', stroke: '#4e150a', 'stroke-width': .8 });
  svgEl(grp, 'line', { x1: cx, y1: cy - 28, x2: cx, y2: cy - 18, stroke: 'var(--cream)', 'stroke-width': 2, 'stroke-linecap': 'round' });
  svgEl(grp, 'ellipse', { cx: cx - 4, cy: cy - 8, rx: 5, ry: 3, fill: 'rgba(255,255,255,.18)', transform: `rotate(-30,${cx - 4},${cy - 8})` });
  let idx;
  const set = v => {
    idx = Math.max(0, Math.min(steps.length - 1, Math.round(v)));
    grp.style.transform = `rotate(${-135 + idx / (steps.length - 1) * 270}deg)`;
    grp.style.transformOrigin = `${cx}px ${cy}px`;
    const db = steps[idx];
    onChange(db, (db > 0 ? '+' : '') + db + ' dB');
  };
  dragDelta(s, () => idx, set, { min: 0, max: steps.length - 1, sens: .05 });
  set(opts.index !== undefined ? opts.index : 7);
  return { el: s, get: () => idx, set };
};

/* R28 rotary disc switch — the whole disc turns between heavy positions */
GW.discSwitch = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const positions = opts.positions || [['OFF', -45], ['ON', 45], ['COMBINE', 135]];
  const s = stageSvg(host, 'rsvg press', 110, 116), cx = 55, cy = 58;
  gradDef('discRed', 'radialGradient', { cx: '42%', cy: '34%', r: '85%' }, [['0', '#d98a6f'], ['.65', 'var(--fail)'], ['1', '#7a2a1a']]);
  gradDef('sfScrew', 'radialGradient', { cx: '40%', cy: '35%', r: '75%' }, [['0', '#9b968a'], ['1', '#4a463e']]);
  svgEl(s, 'circle', { cx, cy, r: 48, fill: '#1a1714', stroke: '#060505', 'stroke-width': 1.5 });
  for (let k = 0; k < 4; k++) {
    const [x, y] = polar(cx, cy, 44, 45 + k * 90);
    svgEl(s, 'circle', { cx: x, cy: y, r: 2.6, fill: 'url(#sfScrew)', stroke: '#0a0908', 'stroke-width': .5 });
  }
  const lbls = positions.map(([lbl, a]) => {
    const [tx, ty] = polar(cx, cy, 42, a);
    const t = svgEl(s, 'text', { x: tx, y: ty + 2.4, 'text-anchor': 'middle', 'font-size': 5.8, 'letter-spacing': '.06em', 'font-family': 'var(--mono)', fill: 'var(--dim)' });
    t.textContent = lbl; return t;
  });
  svgEl(s, 'circle', { cx, cy, r: 36, fill: 'url(#discRed)', stroke: '#4e150a', 'stroke-width': 1 });
  const grp = svgEl(s, 'g', {}); grp.style.transition = 'transform .15s'; grp.style.transformOrigin = `${cx}px ${cy}px`;
  svgEl(grp, 'rect', { x: cx - 27, y: cy - 8, width: 54, height: 16, rx: 8, fill: 'url(#discRed)', stroke: '#8f3520', 'stroke-width': 1 });
  svgEl(grp, 'rect', { x: cx - 25, y: cy - 6.5, width: 50, height: 4, rx: 2, fill: 'rgba(255,255,255,.16)' });
  svgEl(grp, 'line', { x1: cx + 20, y1: cy, x2: cx + 26, y2: cy, stroke: 'var(--cream)', 'stroke-width': 2.5, 'stroke-linecap': 'round' });
  svgEl(s, 'ellipse', { cx: cx - 12, cy: cy - 14, rx: 12, ry: 6, fill: 'rgba(255,255,255,.10)', transform: `rotate(-28,${cx - 12},${cy - 14})` });
  let idx;
  const set = i => {
    idx = i;
    grp.style.transform = `rotate(${positions[i][1]}deg)`;
    lbls.forEach((t, k) => t.setAttribute('fill', k === i ? 'var(--gold-hi)' : 'var(--dim)'));
    onChange(idx, positions[i][0]);
  };
  s.addEventListener('click', () => set((idx + 1) % positions.length));
  set(opts.index !== undefined ? opts.index : 1);
  return { el: s, get: () => idx, set };
};

/* R29 guarded toggle — guard posts + red collar mark the critical throw */
GW.guardedToggle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 90, 100), cx = 45, cy = 52;
  gradDef('discRed', 'radialGradient', { cx: '42%', cy: '34%', r: '85%' }, [['0', '#d98a6f'], ['.65', 'var(--fail)'], ['1', '#7a2a1a']]);
  gradDef('nutG', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#8a8578'], ['1', '#4e4a42']]);
  gradDef('chromeG', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 0 }, [['0', '#7e7a70'], ['.45', '#e8e5db'], ['1', '#8a867c']]);
  gradDef('tipG', 'radialGradient', { cx: '40%', cy: '32%', r: '75%' }, [['0', '#f2efe8'], ['1', '#7e7a70']]);
  const lblOn = svgEl(s, 'text', { x: cx, y: 12, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--gold-hi)' });
  lblOn.textContent = opts.onLabel || 'ON';
  const lblOff = svgEl(s, 'text', { x: cx, y: 96, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--dim)' });
  lblOff.textContent = opts.offLabel || 'OFF';
  svgEl(s, 'circle', { cx, cy, r: 13, fill: 'url(#discRed)', stroke: '#4e150a', 'stroke-width': 1 });
  const pts = []; for (let k = 0; k < 6; k++) { const a = (k * 60 + 30) * Math.PI / 180; pts.push((cx + 11 * Math.cos(a)) + ',' + (cy + 11 * Math.sin(a))); }
  svgEl(s, 'polygon', { points: pts.join(' '), fill: 'url(#nutG)', stroke: '#2b2822' });
  svgEl(s, 'circle', { cx, cy, r: 6, fill: '#14110e', stroke: '#000' });
  for (const gx of [16, 74]) {
    svgEl(s, 'rect', { x: gx - 6, y: cy - 24, width: 12, height: 48, rx: 6, fill: 'url(#nutG)', stroke: '#2b2822', 'stroke-width': 1 });
    svgEl(s, 'rect', { x: gx - 4, y: cy - 21, width: 3.5, height: 42, rx: 2, fill: 'rgba(255,255,255,.14)' });
  }
  const lever = svgEl(s, 'g', {});
  svgEl(lever, 'path', { d: `M ${cx - 3} ${cy} L ${cx - 2} 26 L ${cx + 2} 26 L ${cx + 3} ${cy} Z`, fill: 'url(#chromeG)', stroke: '#4e4a42', 'stroke-width': .5 });
  svgEl(lever, 'rect', { x: cx - 4.5, y: 16, width: 9, height: 12, rx: 2, fill: 'url(#tipG)', stroke: '#5e5a52', 'stroke-width': .6 });
  for (let r = 0; r < 4; r++) svgEl(lever, 'line', { x1: cx - 3.5, y1: 18.5 + r * 2.4, x2: cx + 3.5, y2: 18.5 + r * 2.4, stroke: 'rgba(0,0,0,.25)', 'stroke-width': .8 });
  lever.style.transformOrigin = `${cx}px ${cy}px`; lever.style.transition = 'transform .12s';
  let on;
  const set = v => {
    on = !!v;
    lever.style.transform = on ? 'rotate(0deg)' : 'rotate(180deg)';
    lblOn.setAttribute('fill', on ? 'var(--gold-hi)' : 'var(--dim)');
    lblOff.setAttribute('fill', on ? 'var(--dim)' : 'var(--gold-hi)');
    onChange(on, on ? 'ON' : 'OFF');
  };
  s.addEventListener('click', () => set(!on));
  set(opts.on !== undefined ? opts.on : true);
  return { el: s, get: () => on, set };
};

/* R32 mechanical timer dial — dial rotates under a fixed index; wind by drag, stop by the red knob.
   Runs its own 1 Hz wind-down (a demo minute per second) unless reduced motion is set. */
GW.timerDial = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 158, 132), cx = 62, cy = 58;
  gradDef('mtFace', 'radialGradient', { cx: '50%', cy: '42%', r: '75%' }, [['0', '#282320'], ['1', '#14110e']]);
  gradDef('mtRed', 'radialGradient', { cx: '38%', cy: '32%', r: '80%' }, [['0', '#e0523a'], ['1', '#8f2416']]);
  gradDef('mtHub', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#c9c4b8'], ['1', '#6e685c']]);
  /* bezel + knurled coin edge */
  svgEl(s, 'circle', { cx, cy, r: 50, fill: '#17140f', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 47.5, fill: 'none', stroke: '#3a352c', 'stroke-width': 4, 'stroke-dasharray': '2 1.6' });
  svgEl(s, 'circle', { cx, cy, r: 44, fill: 'url(#mtFace)', stroke: '#0a0908', 'stroke-width': 1 });
  /* rotating scale: OFF at 0, minutes climb clockwise at 4.5 deg/min (60 at 270) */
  const rot = svgEl(s, 'g', {});
  for (let m = 0; m <= 60; m += 5) {
    const major = m % 20 === 0;
    const [x1, y1] = polar(cx, cy, 40, m * 4.5), [x2, y2] = polar(cx, cy, major ? 34 : 37, m * 4.5);
    svgEl(rot, 'line', { x1, y1, x2, y2, stroke: 'var(--cream)', 'stroke-width': major ? 1.2 : .55, opacity: major ? .9 : .55 });
  }
  for (const m of [20, 40, 60]) {
    const [x, y] = polar(cx, cy, 27, m * 4.5);
    svgEl(rot, 'text', { x, y: y + 3, 'text-anchor': 'middle', 'font-size': 9, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' }).textContent = String(m);
  }
  const [ox, oy] = polar(cx, cy, 27, 0);
  svgEl(rot, 'text', { x: ox, y: oy + 3, 'text-anchor': 'middle', 'font-size': 7.5, 'font-weight': 700, 'font-family': 'var(--mono)', fill: '#e0523a' }).textContent = 'OFF';
  const [mx, my] = polar(cx, cy, 16, 180);
  svgEl(rot, 'text', { x: mx, y: my + 2.5, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.14em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = 'MINUTES';
  /* hub with screw slot */
  svgEl(s, 'circle', { cx, cy, r: 9, fill: 'url(#mtHub)', stroke: '#3c382f', 'stroke-width': 1 });
  svgEl(s, 'line', { x1: cx - 5.5, y1: cy, x2: cx + 5.5, y2: cy, stroke: '#4a4438', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 2.2, fill: '#8f897b' });
  /* fixed red index at top + winding-direction arrow */
  svgEl(s, 'line', { x1: cx, y1: cy - 44, x2: cx, y2: cy - 32, stroke: '#e0523a', 'stroke-width': 1.6 });
  svgEl(s, 'path', { d: 'M 122 14 A 26 26 0 0 1 136 26', fill: 'none', stroke: 'var(--steel)', 'stroke-width': 1.6 });
  svgEl(s, 'polygon', { points: '136,26 130.5,24.5 134.5,19.5', fill: 'var(--steel)' });
  /* engraved plate captions */
  const cap = (t, y) => svgEl(s, 'text', { x: 4, y, 'font-size': 6.2, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = t;
  cap('PUSH TO STOP', 118); cap('TURN TO START', 128);
  let min;
  const set = m => {
    min = Math.max(0, Math.min(60, m));
    rot.setAttribute('transform', `rotate(${(-min * 4.5).toFixed(2)},${cx},${cy})`);
    onChange(min, min > 0.5 ? 'T-' + Math.round(min) + ' MIN' : 'OFF');
  };
  /* dial drag surface (under the knob in DOM so the knob wins the overlap) */
  const hit = svgEl(s, 'circle', { cx, cy, r: 50, fill: 'transparent' });
  hit.style.cursor = 'grab';
  dragDelta(hit, () => min, set, { min: 0, max: 60 });
  /* red stop knob: fluted edge, domed center */
  const knob = svgEl(s, 'g', {});
  svgEl(knob, 'circle', { cx: 126, cy: 104, r: 20, fill: 'url(#mtRed)', stroke: '#5c150c', 'stroke-width': 1.5 });
  svgEl(knob, 'circle', { cx: 126, cy: 104, r: 18, fill: 'none', stroke: 'rgba(0,0,0,.4)', 'stroke-width': 3.4, 'stroke-dasharray': '3 2.4' });
  svgEl(knob, 'circle', { cx: 126, cy: 104, r: 8.5, fill: 'url(#mtRed)', stroke: 'rgba(0,0,0,.3)', 'stroke-width': .8 });
  svgEl(knob, 'ellipse', { cx: 121, cy: 98, rx: 6, ry: 3.4, fill: 'rgba(255,255,255,.18)', transform: 'rotate(-28,121,98)' });
  knob.style.cursor = 'pointer';
  knob.addEventListener('click', () => { set(0); onChange(0, 'STOP · OFF'); });
  set(opts.minutes !== undefined ? opts.minutes : 0);
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches)
    setInterval(() => { if (min > 0) { set(min - 1); if (min === 0) onChange(0, 'DING · OFF'); } }, 1000);
  return { el: s, get: () => min, set };
};

/* R33 four-way rocker — quadrant clicks step a tracked cursor; arrows flash on press */
GW.rockerPad = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 110, 110), cx = 55, cy = 55;
  gradDef('rk4Pad', 'radialGradient', { cx: '42%', cy: '34%', r: '85%' }, [['0', '#33302b'], ['1', '#141210']]);
  gradDef('rk4Arr', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#e9e4d6'], ['1', '#9d988b']]);
  gradDef('rk4Nub', 'radialGradient', { cx: '38%', cy: '30%', r: '85%' }, [['0', '#4a453e'], ['1', '#0d0c0a']]);
  /* recessed plate + rubber pad */
  svgEl(s, 'rect', { x: 3, y: 3, width: 104, height: 104, rx: 18, fill: '#211e1a', stroke: '#0c0b09', 'stroke-width': 1.5 });
  svgEl(s, 'circle', { cx, cy, r: 45, fill: '#0f0d0b' });
  svgEl(s, 'circle', { cx, cy, r: 41, fill: 'url(#rk4Pad)', stroke: '#060505', 'stroke-width': 1 });
  /* four arrows, pointing outward */
  const ARR = { up: '55,22 45,36 65,36', down: '55,88 45,74 65,74', left: '22,55 36,45 36,65', right: '88,55 74,45 74,65' };
  const arrows = {};
  for (const [dir, pts] of Object.entries(ARR))
    arrows[dir] = svgEl(s, 'polygon', { points: pts, fill: 'url(#rk4Arr)', stroke: '#3c382f', 'stroke-width': .7 });
  /* center pivot nub */
  svgEl(s, 'circle', { cx, cy, r: 7, fill: 'url(#rk4Nub)', stroke: '#060505', 'stroke-width': .8 });
  svgEl(s, 'ellipse', { cx: cx - 2, cy: cy - 2.5, rx: 2.6, ry: 1.7, fill: 'rgba(255,255,255,.25)' });
  /* quadrant hit zones (drawn last so they win), press flash + tracked position */
  let rx = 0, ry = 0;
  const press = (dir, dx, dy) => {
    rx += dx; ry += dy;
    onChange({ x: rx, y: ry, dir }, dir.toUpperCase() + ' · x ' + rx + ' y ' + ry);
    arrows[dir].setAttribute('fill', 'var(--gold-hi)');
    setTimeout(() => arrows[dir].setAttribute('fill', 'url(#rk4Arr)'), 160);
  };
  const zone = (dir, pts, dx, dy) => {
    const z = svgEl(s, 'polygon', { points: pts, fill: 'transparent' });
    z.style.cursor = 'pointer'; z.addEventListener('click', () => press(dir, dx, dy));
  };
  zone('up', `${cx},${cy} 20,20 90,20`, 0, 1);
  zone('down', `${cx},${cy} 20,90 90,90`, 0, -1);
  zone('left', `${cx},${cy} 20,20 20,90`, -1, 0);
  zone('right', `${cx},${cy} 90,20 90,90`, 1, 0);
  onChange({ x: 0, y: 0, dir: null }, 'x 0 y 0');
  return { el: s, get: () => ({ x: rx, y: ry }) };
};

/* R34 four-way toggle selector — ball lever throws to a diagonal; corner lamps show the state */
GW.fourWayToggle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 130, 130), cx = 65, cy = 65;
  gradDef('fw4Chrome', 'linearGradient', { x1: 0, y1: 0, x2: 1, y2: 1 }, [['0', '#e8e6e0'], ['.5', '#9a968c'], ['1', '#55524a']]);
  gradDef('fw4Ball', 'radialGradient', { cx: '36%', cy: '30%', r: '80%' }, [['0', '#f2f0ea'], ['.55', '#8e8a80'], ['1', '#3c3a34']]);
  /* printed panel graphics: axes, circle, diagonal square, labels */
  svgEl(s, 'line', { x1: 8, y1: cy, x2: 122, y2: cy, stroke: 'var(--steel)', 'stroke-width': .7, opacity: .7 });
  svgEl(s, 'line', { x1: cx, y1: 8, x2: cx, y2: 122, stroke: 'var(--steel)', 'stroke-width': .7, opacity: .7 });
  svgEl(s, 'text', { x: cx + 2, y: 13, 'font-size': 7, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = 'Y';
  svgEl(s, 'text', { x: 116, y: cy - 4, 'font-size': 7, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = 'X';
  svgEl(s, 'circle', { cx, cy, r: 42, fill: 'none', stroke: 'var(--steel)', 'stroke-width': .9, opacity: .8 });
  const QUAD = { A: 315, B: 45, C: 135, D: 225 };
  const diag = Object.values(QUAD).map(a => polar(cx, cy, 42, a));
  svgEl(s, 'polygon', { points: diag.map(p => p.join(',')).join(' '), fill: 'none', stroke: 'var(--steel)', 'stroke-width': .8, opacity: .8 });
  const LAMP_AT = { A: [14, 14], B: [116, 14], C: [116, 116], D: [14, 116] };
  const lamps = {};
  for (const [q, a] of Object.entries(QUAD)) {
    const [lx, ly] = polar(cx, cy, 42, a);
    const [px, py] = LAMP_AT[q];
    svgEl(s, 'line', { x1: lx, y1: ly, x2: px, y2: py, stroke: 'var(--steel)', 'stroke-width': .7, opacity: .5 });
    svgEl(s, 'circle', { cx: lx, cy: ly, r: 6.5, fill: '#14110e', stroke: 'var(--steel)', 'stroke-width': .9 });
    svgEl(s, 'text', { x: lx, y: ly + 2.8, 'text-anchor': 'middle', 'font-size': 7.5, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' }).textContent = q;
    svgEl(s, 'circle', { cx: px, cy: py, r: 5.5, fill: '#0d0b09', stroke: '#2c2820', 'stroke-width': 1 });
    lamps[q] = svgEl(s, 'circle', { cx: px, cy: py, r: 3.6, fill: '#3a3426' });
  }
  /* bezel + boot */
  svgEl(s, 'circle', { cx, cy, r: 20, fill: '#0d0c0a', stroke: '#2a2722', 'stroke-width': 1.5 });
  svgEl(s, 'circle', { cx, cy, r: 15, fill: '#17140f', stroke: '#060505', 'stroke-width': 1 });
  /* lever: shaft + grip rotate to the selected diagonal; ball pivot stays centered */
  const lever = svgEl(s, 'g', {});
  svgEl(lever, 'polygon', { points: `${cx - 3},${cy} ${cx + 3},${cy} ${cx + 2},${cy - 26} ${cx - 2},${cy - 26}`, fill: 'url(#fw4Chrome)', stroke: '#3c3a34', 'stroke-width': .6 });
  svgEl(lever, 'rect', { x: cx - 3.4, y: cy - 40, width: 6.8, height: 16, rx: 3, fill: 'url(#fw4Chrome)', stroke: '#3c3a34', 'stroke-width': .6 });
  svgEl(s, 'circle', { cx, cy, r: 8.5, fill: 'url(#fw4Ball)', stroke: '#26241f', 'stroke-width': .8 });
  svgEl(s, 'ellipse', { cx: cx - 2.6, cy: cy - 3, rx: 2.8, ry: 1.9, fill: 'rgba(255,255,255,.5)' });
  let pos = null;
  const set = q => {
    pos = q;
    lever.setAttribute('transform', `rotate(${QUAD[q]},${cx},${cy})`);
    for (const k of Object.keys(QUAD)) {
      lamps[k].setAttribute('fill', k === q ? 'var(--jewel-a)' : '#3a3426');
      lamps[k].setAttribute('filter', k === q ? 'drop-shadow(0 0 4px rgba(255,180,58,.8))' : 'none');
    }
    onChange(pos, 'POS ' + q);
  };
  /* quadrant click zones (diagonal quadrants, drawn last) */
  const zone = (q, pts) => {
    const z = svgEl(s, 'polygon', { points: pts, fill: 'transparent' });
    z.style.cursor = 'pointer'; z.addEventListener('click', () => set(q));
  };
  zone('A', `${cx},${cy} ${cx},5 5,5 5,${cy}`);
  zone('B', `${cx},${cy} ${cx},5 125,5 125,${cy}`);
  zone('C', `${cx},${cy} 125,${cy} 125,125 ${cx},125`);
  zone('D', `${cx},${cy} ${cx},125 5,125 5,${cy}`);
  set(opts.position || 'C');
  return { el: s, get: () => pos, set };
};

/* R37 pin routing matrix — click an intersection to seat/pull a pin; many-to-many */
GW.pinMatrix = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const ROWS = opts.rows || ['OSC1', 'OSC2', 'LFO', 'NOIS', 'ENV'];
  const COLS = opts.cols || ['VCF', 'VCA', 'PAN', 'DLY', 'OUT', 'MOD'];
  const pins = new Set(opts.pins || ['OSC1>VCF', 'LFO>PAN', 'ENV>VCA']);   /* a legible default patch */
  const s = stageSvg(host, 'rsvg press', 160, 110);
  const X0 = 42, Y0 = 30, DX = 19, DY = 15.5;
  svgEl(s, 'rect', { x: 2, y: 2, width: 156, height: 106, rx: 8, fill: '#1c1916', stroke: '#060505', 'stroke-width': 1.5 });
  COLS.forEach((c, j) => svgEl(s, 'text', { x: X0 + j * DX, y: 16, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.05em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = c);
  ROWS.forEach((r, i) => svgEl(s, 'text', { x: 34, y: Y0 + i * DY + 2, 'text-anchor': 'end', 'font-size': 5.4, 'letter-spacing': '.05em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = r);
  ROWS.forEach((r, i) => COLS.forEach((c, j) => {
    const cx = X0 + j * DX, cy = Y0 + i * DY, key = r + '>' + c;
    svgEl(s, 'circle', { cx, cy, r: 3.4, fill: '#0a0908', stroke: '#2c2820', 'stroke-width': 1 });
    const cap = svgEl(s, 'circle', { cx, cy, r: 4.4, fill: 'var(--gold)', stroke: '#7d5c16', 'stroke-width': 1, opacity: pins.has(key) ? 1 : 0, filter: 'drop-shadow(0 1px 2px rgba(0,0,0,.6))' });
    const hit = svgEl(s, 'circle', { cx, cy, r: 8, fill: 'transparent' });
    hit.style.cursor = 'pointer';
    hit.addEventListener('click', () => {
      const on = !pins.has(key);
      if (on) pins.add(key); else pins.delete(key);
      cap.setAttribute('opacity', on ? 1 : 0);
      onChange([...pins], (on ? r + ' → ' + c : 'pulled ' + r + ' → ' + c) + ' · ' + pins.size + ' routes');
    });
  }));
  onChange([...pins], pins.size + ' routes');
  return { el: s, get: () => [...pins] };
};

/* R38 dead-man button — state exists only while the pointer holds it down */
GW.deadMan = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 120, 110), cx = 60, cy = 58;
  gradDef('dmBtn', 'radialGradient', { cx: '40%', cy: '32%', r: '85%' }, [['0', '#3a3631'], ['1', '#16130f']]);
  svgEl(s, 'rect', { x: 4, y: 4, width: 112, height: 102, rx: 12, fill: '#211e1a', stroke: '#0c0b09', 'stroke-width': 1.5 });
  svgEl(s, 'text', { x: cx, y: 18, 'text-anchor': 'middle', 'font-size': 6.2, 'letter-spacing': '.16em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = opts.caption || 'HOLD TO RUN';
  const lamp = svgEl(s, 'circle', { cx: 104, cy: 16, r: 4.5, fill: '#1e2a12' });
  const ring = svgEl(s, 'circle', { cx, cy, r: 33, fill: 'none', stroke: '#2c2820', 'stroke-width': 3 });
  const btn = svgEl(s, 'g', {});
  svgEl(btn, 'circle', { cx, cy, r: 28, fill: 'url(#dmBtn)', stroke: '#060505', 'stroke-width': 1.5 });
  svgEl(btn, 'circle', { cx, cy, r: 22, fill: 'none', stroke: 'rgba(255,255,255,.07)', 'stroke-width': 1 });
  svgEl(btn, 'text', { x: cx, y: cy + 2.5, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.1em', 'font-family': 'var(--mono)', fill: 'var(--silver)' }).textContent = opts.label || 'RUN';
  btn.style.cursor = 'pointer';
  let t0 = null, iv = null;
  const stop = () => {
    if (t0 === null) return;
    const held = ((Date.now() - t0) / 1000).toFixed(1);
    t0 = null; clearInterval(iv);
    btn.removeAttribute('transform');
    ring.setAttribute('stroke', '#2c2820'); ring.removeAttribute('filter');
    lamp.setAttribute('fill', '#1e2a12'); lamp.removeAttribute('filter');
    onChange(false, 'SAFE (held ' + held + 's)');
  };
  btn.addEventListener('pointerdown', e => {
    btn.setPointerCapture(e.pointerId);
    t0 = Date.now();
    btn.setAttribute('transform', 'translate(0,1.5)');
    ring.setAttribute('stroke', 'var(--gold)'); ring.setAttribute('filter', 'drop-shadow(0 0 5px rgba(var(--glow-lo),.7))');
    lamp.setAttribute('fill', 'var(--pass)'); lamp.setAttribute('filter', 'drop-shadow(0 0 4px rgba(116,147,47,.8))');
    onChange(true, 'RUNNING 0.0s');
    iv = setInterval(() => { if (t0 !== null) onChange(true, 'RUNNING ' + ((Date.now() - t0) / 1000).toFixed(1) + 's'); }, 100);
    e.preventDefault();
  });
  btn.addEventListener('pointerup', stop);
  btn.addEventListener('pointercancel', stop);
  onChange(false, 'SAFE');
  return { el: s, get: () => t0 !== null };
};

/* R39 rotary telephone dial — click a hole; the wheel winds to the stop and returns */
GW.telephoneDial = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 130, 130), cx = 65, cy = 63;
  const DIGITS = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0'];
  const angOf = i => (60 - i * 30 + 360) % 360;            /* 1 at 60cw, counterclockwise to 0 at 150 */
  const STOP = 105;
  gradDef('tdWheel', 'radialGradient', { cx: '42%', cy: '36%', r: '85%' }, [['0', '#8f8a7e'], ['1', '#4a463e']]);
  svgEl(s, 'circle', { cx, cy, r: 56, fill: '#14110e', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 50, fill: '#1e1a16', stroke: '#0a0908', 'stroke-width': 1 });
  /* rotating finger wheel: ring + hole openings (dark wells punched in the metal) */
  const wheel = svgEl(s, 'g', {});
  svgEl(wheel, 'circle', { cx, cy, r: 46, fill: 'none', stroke: 'url(#tdWheel)', 'stroke-width': 17, opacity: .95 });
  DIGITS.forEach((_, i) => {
    const [x, y] = polar(cx, cy, 38, angOf(i));
    svgEl(wheel, 'circle', { cx: x, cy: y, r: 7.2, fill: '#1e1a16', stroke: '#26221c', 'stroke-width': 1.4 });
  });
  /* fixed digits ON TOP so they read through the holes (they stay put while the wheel spins) */
  DIGITS.forEach((d, i) => {
    const [x, y] = polar(cx, cy, 38, angOf(i));
    svgEl(s, 'text', { x, y: y + 3, 'text-anchor': 'middle', 'font-size': 8.5, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' }).textContent = d;
  });
  svgEl(s, 'circle', { cx, cy, r: 16, fill: 'url(#tdWheel)', stroke: '#26221c', 'stroke-width': 1 });
  /* finger stop */
  const [fx, fy] = polar(cx, cy, 52, STOP);
  svgEl(s, 'rect', { x: fx - 2.5, y: fy - 8, width: 5, height: 16, rx: 2, fill: '#b8b2a4', stroke: '#3c382f', 'stroke-width': 1, transform: `rotate(${STOP},${fx},${fy})` });
  let dialed = '', spinning = false;
  const setW = a => wheel.setAttribute('transform', `rotate(${a},${cx},${cy})`);
  const finish = d => { dialed = (dialed + d).slice(-10); onChange(dialed, dialed); spinning = false; };
  DIGITS.forEach((d, i) => {
    const [x, y] = polar(cx, cy, 38, angOf(i));
    const hit = svgEl(s, 'circle', { cx: x, cy: y, r: 8.5, fill: 'transparent' });
    hit.style.cursor = 'pointer';
    hit.addEventListener('click', () => {
      if (spinning) return; spinning = true;
      const R = (STOP - angOf(i) + 360) % 360;
      if (matchMedia('(prefers-reduced-motion: reduce)').matches) { setW(R); setTimeout(() => { setW(0); finish(d); }, 160); return; }
      const t0 = performance.now(), Tf = R / 300 * 1000, Tb = R / 450 * 1000;
      const step = t => {
        const el = t - t0;
        if (el < Tf) { setW(R * el / Tf); requestAnimationFrame(step); }
        else if (el < Tf + 80) { setW(R); requestAnimationFrame(step); }
        else if (el < Tf + 80 + Tb) { setW(R * (1 - (el - Tf - 80) / Tb)); requestAnimationFrame(step); }
        else { setW(0); finish(d); }
      };
      requestAnimationFrame(step);
    });
  });
  onChange('', 'dial a number');
  return { el: s, get: () => dialed };
};

/* R40 circuit breaker panel — on/off by click, TRIP pops one to the amber mid-state, reset is two-step */
GW.breakerPanel = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const NAMES = opts.names || ['MAIN', 'PUMP', 'LAMP', 'AUX'];
  const s = stageSvg(host, 'rsvg press', 160, 110);
  svgEl(s, 'rect', { x: 2, y: 2, width: 156, height: 106, rx: 8, fill: '#1c1916', stroke: '#060505', 'stroke-width': 1.5 });
  const brk = [];
  const draw = () => {
    let closed = 0, trip = null;
    brk.forEach(b => {
      if (b.state === 'on') closed++; if (b.state === 'tripped') trip = b.name;
      b.lamp.setAttribute('fill', b.state === 'on' ? 'var(--pass)' : '#1e2a12');
      b.lamp.setAttribute('filter', b.state === 'on' ? 'drop-shadow(0 0 3px rgba(116,147,47,.8))' : 'none');
      b.handle.setAttribute('y', b.state === 'on' ? 40 : b.state === 'tripped' ? 57 : 74);
      b.collar.setAttribute('opacity', b.state === 'tripped' ? 1 : 0);
    });
    onChange(brk.map(b => b.state), closed + '/' + NAMES.length + ' closed' + (trip ? ' · ' + trip + ' TRIPPED' : ''));
  };
  NAMES.forEach((name, i) => {
    const x = 14 + i * 30;
    svgEl(s, 'rect', { x, y: 36, width: 20, height: 52, rx: 4, fill: '#14110e', stroke: '#2c2820', 'stroke-width': 1 });
    const lamp = svgEl(s, 'circle', { cx: x + 10, cy: 26, r: 4, fill: '#1e2a12' });
    const collar = svgEl(s, 'rect', { x: x + 4, y: 69, width: 12, height: 5, fill: 'var(--amber-warn)', opacity: 0 });
    const handle = svgEl(s, 'rect', { x: x + 4, y: 40, width: 12, height: 14, rx: 2, fill: '#3a3631', stroke: '#060505', 'stroke-width': 1 });
    svgEl(s, 'text', { x: x + 10, y: 98, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.05em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = name;
    const hit = svgEl(s, 'rect', { x, y: 20, width: 20, height: 80, fill: 'transparent' });
    hit.style.cursor = 'pointer';
    const b = { name, state: i < 3 ? 'on' : 'off', lamp, collar, handle };
    hit.addEventListener('click', () => { b.state = b.state === 'on' ? 'off' : b.state === 'off' ? 'on' : 'off'; draw(); });
    brk.push(b);
  });
  const tb = svgEl(s, 'g', {});
  svgEl(tb, 'rect', { x: 132, y: 40, width: 22, height: 16, rx: 4, fill: 'var(--fail)', stroke: '#5c150c', 'stroke-width': 1 });
  svgEl(tb, 'text', { x: 143, y: 50.5, 'text-anchor': 'middle', 'font-size': 6, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' }).textContent = 'TRIP';
  tb.style.cursor = 'pointer';
  tb.addEventListener('click', () => { for (let i = brk.length - 1; i >= 0; i--) if (brk[i].state === 'on') { brk[i].state = 'tripped'; break; } draw(); });
  draw();
  return { el: s, get: () => brk.map(b => b.state) };
};

/* R41 DSKY — verb/noun command grammar with status lamps and a lamp-test verb */
GW.dsky = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const LAMPS = ['UPLINK', 'TEMP', 'GIMBAL', 'PROG', 'RESTART', 'OPR ERR'];
  const el = document.createElement('div'); el.className = 'dsky'; host.appendChild(el);
  el.innerHTML =
    `<div class="lampcol">${LAMPS.map(l => `<div class="sl" data-l="${l}">${l}</div>`).join('')}</div>` +
    `<div class="right"><div class="wins">` +
    `<div class="win" data-w="prog"><span class="wl">PROG</span><span class="wd"></span></div>` +
    `<div class="win" data-w="verb"><span class="wl">VERB</span><span class="wd"></span></div>` +
    `<div class="win" data-w="noun"><span class="wl">NOUN</span><span class="wd"></span></div>` +
    `</div><div class="pad"></div></div>`;
  const win = w => el.querySelector(`[data-w="${w}"]`);
  const setWin = (w, txt) => { win(w).querySelector('.wd').innerHTML = seg7(txt[0] || ' ') + seg7(txt[1] || ' '); };
  const lampEl = l => el.querySelector(`[data-l="${l}"]`);
  let mode = null, vals = { prog: '  ', verb: '  ', noun: '  ' }, entry = '';
  const KEYS = ['VERB', 'NOUN', 'CLR', 'ENTR', 'RSET', '7', '8', '9', '4', '5', '6', '1', '2', '3', '0'];
  const pad = el.querySelector('.pad');
  const hot = () => { el.querySelectorAll('.win').forEach(w => w.classList.toggle('hot', w.dataset.w === mode)); };
  const oprErr = () => { lampEl('OPR ERR').classList.add('on'); setTimeout(() => lampEl('OPR ERR').classList.remove('on'), 1200); onChange(vals, 'OPR ERR'); };
  const commit = () => {
    if (vals.verb.trim().length < 2) { oprErr(); return; }
    const v = vals.verb, n = vals.noun.trim();
    if (v === '35') {
      LAMPS.forEach(l => lampEl(l).classList.add('on'));
      setTimeout(() => LAMPS.forEach(l => lampEl(l).classList.remove('on')), 1400);
      onChange(vals, 'V35 · lamp test');
    }
    else if (v === '16' && n === '36') { vals.prog = '16'; setWin('prog', vals.prog); onChange(vals, 'V16 N36 · monitor clock'); }
    else onChange(vals, 'V' + v + (n ? ' N' + n : '') + ' ENTR');
    vals.verb = '  '; vals.noun = '  '; entry = ''; mode = null; hot();
  };
  KEYS.forEach(k => {
    const b = document.createElement('button'); b.className = 'key'; b.textContent = k;
    b.addEventListener('click', () => {
      if (k === 'VERB' || k === 'NOUN') { mode = k.toLowerCase(); entry = ''; vals[mode] = '  '; setWin(mode, '  '); hot(); }
      else if (k === 'CLR') { if (mode) { vals[mode] = '  '; entry = ''; setWin(mode, '  '); } }
      else if (k === 'RSET') { LAMPS.forEach(l => lampEl(l).classList.remove('on')); onChange(vals, 'RSET'); }
      else if (k === 'ENTR') commit();
      else if (/\d/.test(k)) {
        if (!mode) { oprErr(); return; }
        entry = (entry + k).slice(0, 2); vals[mode] = entry.padEnd(2, ' '); setWin(mode, vals[mode]);
      }
    });
    pad.appendChild(b);
  });
  vals.prog = '00'; setWin('prog', vals.prog); setWin('verb', '  '); setWin('noun', '  ');
  onChange(vals, 'VERB ## ENTR');
  return { el, get: () => ({ ...vals }) };
};

/* R42 cam-timer program drum — the program is a ring; the pointer self-advances through it.
   Runs its own reduced-motion-gated 2 s step interval once started. */
GW.camTimer = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const STEPS = opts.steps || ['OFF', 'FILL', 'WASH', 'WASH', 'WASH', 'RINSE', 'RINSE', 'DRAIN', 'SPIN', 'SPIN', 'FLUFF', 'COOL'];
  const COLS = opts.colors || { OFF: '#3a3426', FILL: '#54677d', WASH: '#d29638', RINSE: '#46b89e', DRAIN: '#969385', SPIN: '#cb6b4d', FLUFF: '#c9b98a', COOL: '#7c99b0' };
  const s = stageSvg(host, 'rsvg press', 130, 130), cx = 65, cy = 65;
  svgEl(s, 'circle', { cx, cy, r: 60, fill: '#17140f', stroke: '#060505', 'stroke-width': 2 });
  STEPS.forEach((st, i) => {
    const a0 = i * 30 - 90, a1 = a0 + 30;
    const p0o = polar(cx, cy, 52, a0 + 90), p1o = polar(cx, cy, 52, a1 + 90), p0i = polar(cx, cy, 38, a0 + 90), p1i = polar(cx, cy, 38, a1 + 90);
    svgEl(s, 'path', { d: `M ${p0i[0]} ${p0i[1]} L ${p0o[0]} ${p0o[1]} A 52 52 0 0 1 ${p1o[0]} ${p1o[1]} L ${p1i[0]} ${p1i[1]} A 38 38 0 0 0 ${p0i[0]} ${p0i[1]} Z`, fill: COLS[st], opacity: .75, stroke: '#0a0908', 'stroke-width': .8 });
    const [tx, ty] = polar(cx, cy, 45, i * 30 + 15);
    svgEl(s, 'text', { x: tx, y: ty + 2, 'text-anchor': 'middle', 'font-size': 4.4, 'font-weight': 700, 'font-family': 'var(--mono)', fill: st === 'OFF' ? 'var(--cream)' : '#14110e' }).textContent = st === 'OFF' ? 'OFF' : st[0];
  });
  svgEl(s, 'circle', { cx, cy, r: 34, fill: '#211e1a', stroke: '#0a0908', 'stroke-width': 1.5 });
  STEPS.forEach((st, i) => {
    if (i === 0) return; const [lx, ly] = polar(cx, cy, 27, i * 30 + 15);
    svgEl(s, 'text', { x: lx, y: ly + 1.8, 'text-anchor': 'middle', 'font-size': 4.2, 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = st;
  });
  svgEl(s, 'circle', { cx, cy, r: 17, fill: '#14110e', stroke: '#2c2820', 'stroke-width': 1.5 });
  const ptr = svgEl(s, 'polygon', { points: `${cx - 2.5},${cy} ${cx + 2.5},${cy} ${cx},${cy - 31}`, fill: 'var(--gold-hi)', filter: 'drop-shadow(0 0 3px rgba(var(--glow-lo),.7))' });
  svgEl(s, 'circle', { cx, cy, r: 5, fill: '#3a3631', stroke: '#060505', 'stroke-width': 1 });
  let pos;
  const set = i => {
    pos = i;
    ptr.setAttribute('transform', `rotate(${i * 30 + 15},${cx},${cy})`);
    onChange(pos, pos === 0 ? 'OFF' : 'STEP ' + pos + ' · ' + STEPS[pos]);
  };
  s.style.cursor = 'pointer';
  s.addEventListener('click', () => set((pos + 1) % STEPS.length));
  set(opts.position !== undefined ? opts.position : 0);
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches)
    setInterval(() => { if (pos > 0) { const n = (pos + 1) % STEPS.length; set(n); if (n === 0) onChange(0, 'CYCLE DONE · OFF'); } }, 2000);
  return { el: s, get: () => pos, set };
};

/* R48 knife switch (side view) — the blade hinges at the left post and lands in the right jaw */
GW.knifeSwitch = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 130, 110);
  gradDef('ksCu', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#d09a5c'], ['1', '#8a5a2a']]);
  const HX = 32, HY = 74;                            /* hinge pivot */
  svgEl(s, 'rect', { x: 6, y: 56, width: 118, height: 44, rx: 6, fill: '#22262a', stroke: '#0c0d0e', 'stroke-width': 1.5 });
  const lamp = svgEl(s, 'circle', { cx: 116, cy: 22, r: 4.5, fill: '#1e2a12' });
  svgEl(s, 'text', { x: 116, y: 36, 'text-anchor': 'middle', 'font-size': 4.8, 'letter-spacing': '.08em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = 'LIVE';
  /* hinge post (left) and jaw clip (right), both on the base */
  svgEl(s, 'rect', { x: HX - 6, y: HY - 6, width: 12, height: 16, rx: 2, fill: 'url(#ksCu)', stroke: '#5c3a18', 'stroke-width': .8 });
  svgEl(s, 'rect', { x: 96, y: HY - 9, width: 5, height: 18, rx: 1.5, fill: 'url(#ksCu)', stroke: '#5c3a18', 'stroke-width': .7 });
  svgEl(s, 'rect', { x: 104, y: HY - 9, width: 5, height: 18, rx: 1.5, fill: 'url(#ksCu)', stroke: '#5c3a18', 'stroke-width': .7 });
  /* blade + upright handle, hinged at (HX,HY) */
  const blade = svgEl(s, 'g', {});
  svgEl(blade, 'rect', { x: HX, y: HY - 3, width: 71, height: 6, rx: 2.5, fill: 'url(#ksCu)', stroke: '#5c3a18', 'stroke-width': .8 });
  svgEl(blade, 'rect', { x: 88, y: HY - 26, width: 7, height: 26, rx: 3, fill: '#14110e', stroke: '#000', 'stroke-width': 1 });
  svgEl(blade, 'circle', { cx: 91.5, cy: HY - 26, r: 5, fill: '#14110e', stroke: '#000', 'stroke-width': 1 });
  svgEl(s, 'circle', { cx: HX, cy: HY, r: 3, fill: '#5c3a18' });
  blade.style.transformBox = 'view-box'; blade.style.transformOrigin = `${HX}px ${HY}px`;
  blade.style.transition = 'transform .28s ease';
  let closed;
  const set = v => {
    closed = !!v;
    blade.style.transform = closed ? 'rotate(0deg)' : 'rotate(-46deg)';
    lamp.setAttribute('fill', closed ? 'var(--pass)' : '#1e2a12');
    lamp.setAttribute('filter', closed ? 'drop-shadow(0 0 4px rgba(116,147,47,.8))' : 'none');
    onChange(closed, closed ? 'CLOSED · live' : 'OPEN · visibly dead');
  };
  s.style.cursor = 'pointer';
  s.addEventListener('click', () => set(!closed));
  set(opts.closed !== undefined ? opts.closed : true);
  return { el: s, get: () => closed, set };
};

/* R49 decade box — four skirted knobs, one digit each; the value is their sum */
GW.decadeBox = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const MUL = [1000, 100, 10, 1], LBL = ['x1000', 'x100', 'x10', 'x1'];
  const digs = (opts.digits || [3, 5, 0, 0]).slice();
  const s = stageSvg(host, 'rsvg', 160, 100);
  svgEl(s, 'rect', { x: 2, y: 2, width: 156, height: 96, rx: 8, fill: '#17140f', stroke: '#060505', 'stroke-width': 1.5 });
  const wins = [], knobs = [];
  const total = () => digs.reduce((a, d, i) => a + d * MUL[i], 0);
  const draw = () => {
    wins.forEach((w, i) => w.textContent = String(digs[i]));
    knobs.forEach((k, i) => k.setAttribute('transform', `rotate(${digs[i] * 36},${28 + i * 35},58)`));
    onChange(total(), total().toLocaleString('en-US') + ' Ω');
  };
  MUL.forEach((_, i) => {
    const cx = 28 + i * 35, cy = 58;
    svgEl(s, 'rect', { x: cx - 8, y: 16, width: 16, height: 12, rx: 2, fill: '#0a0806', stroke: '#2c2820', 'stroke-width': 1 });
    wins.push(svgEl(s, 'text', { x: cx, y: 25.5, 'text-anchor': 'middle', 'font-size': 8, 'font-weight': 700, 'font-family': 'var(--mono)', fill: 'var(--cream)' }));
    svgEl(s, 'circle', { cx, cy, r: 15, fill: '#211e1a', stroke: '#0a0908', 'stroke-width': 1.5 });   /* skirt */
    for (let t = 0; t < 10; t++) {
      const [x1, y1] = polar(cx, cy, 14, t * 36), [x2, y2] = polar(cx, cy, 12, t * 36);
      svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--steel)', 'stroke-width': .6, opacity: .7 });
    }
    const k = svgEl(s, 'g', {});
    svgEl(k, 'circle', { cx, cy, r: 10, fill: '#2c2824', stroke: '#060505', 'stroke-width': 1 });
    svgEl(k, 'line', { x1: cx, y1: cy - 9, x2: cx, y2: cy - 4, stroke: 'var(--gold-hi)', 'stroke-width': 1.8 });
    knobs.push(k);
    svgEl(s, 'text', { x: cx, y: 88, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.06em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = LBL[i];
    const hit = svgEl(s, 'circle', { cx, cy, r: 16, fill: 'transparent' });
    hit.style.cursor = 'ns-resize';
    dragDelta(hit, () => digs[i], v => { digs[i] = Math.round(Math.max(0, Math.min(9, v))); draw(); }, { min: 0, max: 9, sens: 9 / 70 });
  });
  draw();
  return { el: s, get: () => total() };
};

/* R50 two-hand safety — one palm button arms a 500ms window; the other completes the cycle */
GW.twoHandSafety = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 160, 100);
  svgEl(s, 'rect', { x: 2, y: 2, width: 156, height: 96, rx: 8, fill: '#1c1916', stroke: '#060505', 'stroke-width': 1.5 });
  const runLamp = svgEl(s, 'circle', { cx: 80, cy: 24, r: 5.5, fill: '#1e2a12' });
  svgEl(s, 'text', { x: 80, y: 40, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.12em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = 'CYCLE';
  const mkBtn = (cx, lbl) => {
    const g = svgEl(s, 'g', {});
    svgEl(g, 'ellipse', { cx, cy: 70, rx: 19, ry: 6, fill: '#0d0b09' });
    const cap = svgEl(g, 'circle', { cx, cy: 62, r: 16, fill: '#8f2416', stroke: '#5c150c', 'stroke-width': 1.5 });
    svgEl(g, 'ellipse', { cx: cx - 5, cy: 56, rx: 6, ry: 3.4, fill: 'rgba(255,255,255,.22)' });
    svgEl(s, 'text', { x: cx, y: 92, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.08em', 'font-family': 'var(--mono)', fill: 'var(--steel)' }).textContent = lbl;
    g.style.cursor = 'pointer'; return { g, cap };
  };
  const L = mkBtn(32, 'LEFT PALM'), R = mkBtn(128, 'RIGHT PALM');
  let armed = null, armT = null, busy = false;
  const flash = cap => { cap.setAttribute('fill', '#e0523a'); setTimeout(() => cap.setAttribute('fill', '#8f2416'), 200); };
  const fault = () => { armed = null; clearTimeout(armT); onChange('fault', 'TIE-DOWN FAULT · release and retry'); };
  const press = side => {
    if (busy) return;
    if (armed === null) {
      armed = side; flash(side === 'L' ? L.cap : R.cap);
      onChange('armed', side + ' armed · other hand within 0.5s');
      armT = setTimeout(fault, 500); return;
    }
    if (armed === side) { fault(); return; }                 /* same hand twice = tie-down */
    clearTimeout(armT); armed = null; busy = true;
    flash(side === 'L' ? L.cap : R.cap);
    runLamp.setAttribute('fill', 'var(--pass)');
    runLamp.setAttribute('filter', 'drop-shadow(0 0 5px rgba(116,147,47,.8))');
    onChange('running', 'CYCLE RUNNING');
    setTimeout(() => {
      runLamp.setAttribute('fill', '#1e2a12'); runLamp.removeAttribute('filter');
      busy = false; onChange('ready', 'ready');
    }, 1500);
  };
  L.g.addEventListener('click', () => press('L'));
  R.g.addEventListener('click', () => press('R'));
  onChange('ready', 'ready');
  return { el: s, press };
};

/* R51 voice-loop keyset — independent monitor states, exclusive talk, activity flicker */
GW.voiceLoop = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const LOOPS = opts.loops || ['FD', 'GNC', 'ECOM', 'SURG', 'A/G', 'NET1', 'NET2', 'PAO'];
  const el = document.createElement('div'); el.className = 'vloop'; host.appendChild(el);
  const keys = LOOPS.map(l => {
    const k = document.createElement('div'); k.className = 'vk';
    k.innerHTML = l + '<span class="bar"></span>'; k.dataset.state = '0'; el.appendChild(k); return k;
  });
  /* a legible default: FD + A/G monitored, GNC talking */
  keys[0].dataset.state = '1'; keys[0].classList.add('mon');
  keys[4].dataset.state = '1'; keys[4].classList.add('mon');
  keys[1].dataset.state = '2'; keys[1].classList.add('mon', 'tlk');
  const refresh = () => {
    const mon = keys.filter(k => k.dataset.state !== '0').length;
    const tlk = keys.findIndex(k => k.dataset.state === '2');
    onChange(keys.map(k => k.dataset.state), mon === 0 ? 'all loops dropped' : mon + ' monitored' + (tlk >= 0 ? ' · talk ' + LOOPS[tlk] : ''));
  };
  keys.forEach(k => k.addEventListener('click', () => {
    const st = k.dataset.state;
    if (st === '0') { k.dataset.state = '1'; k.classList.add('mon'); }
    else if (st === '1') {
      keys.forEach(o => { if (o.dataset.state === '2') { o.dataset.state = '1'; o.classList.remove('tlk'); } });
      k.dataset.state = '2'; k.classList.add('tlk');
    }
    else { k.dataset.state = '0'; k.classList.remove('mon', 'tlk', 'act'); }
    refresh();
  }));
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches)
    setInterval(() => {
      const t = performance.now() / 1000;
      keys.forEach((k, i) => {
        if (k.dataset.state === '0') { k.classList.remove('act'); return; }
        k.classList.toggle('act', Math.sin(t * (1.1 + i * 0.37) + i * 2.1) > 0.55);
      });
    }, 300);
  refresh();
  return { el, get: () => keys.map(k => k.dataset.state) };
};

/* ---- meters & gauges ----
   Tick contract: the page owns the clock and the signal; live meters expose
   value-driven handles (set/push) that repaint synchronously and fire
   onChange(value, text) like every other builder. Display-side state that
   belongs to the instrument (peak-hold, history buffers) lives in here. */

/* 10 needle gauge — drag up/down sweeps the needle over a 120° arc */
GW.needleGauge = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 50;
  const el = document.createElement('div'); el.className = 'gauge';
  el.innerHTML = `<div class="dial"><div class="arc"></div>
     <div class="tk" style="transform:rotate(-60deg)"></div><div class="tk" style="transform:rotate(0)"></div><div class="tk" style="transform:rotate(60deg)"></div>
     <div class="ndl"></div><div class="hub"></div></div><div class="gv"><span>0</span>%</div>`;
  host.appendChild(el);
  const ndl = el.querySelector('.ndl'), num = el.querySelector('.gv span');
  function set(nv) {
    v = nv;
    ndl.style.transform = `rotate(${-60 + v / 100 * 120}deg)`;
    num.textContent = Math.round(v);
    onChange(v, 'value ' + Math.round(v) + '%');
  }
  dragDelta(el, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el, get: () => v, set };
};

/* 11 stereo VU — two LED bars with peak-hold; set(l, r) drives both */
GW.vuPair = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const n = opts.bars || 16;
  const el = document.createElement('div'); el.className = 'vu';
  el.innerHTML = `<div class="vurow"><span class="ch">L</span><span class="vubar"></span></div>
     <div class="vurow"><span class="ch">R</span><span class="vubar"></span></div>`;
  host.appendChild(el);
  const bars = el.querySelectorAll('.vubar');
  bars.forEach(b => buildBars(b, n));
  const pkL = { v: 0 }, pkR = { v: 0 };
  function paint(bar, l, pk) {
    const b = bar.children, lit = Math.round(l * n);
    pk.v = Math.max(lit, (pk.v || 0) - 0.4); const p = Math.round(pk.v);
    for (let k = 0; k < n; k++) {
      let c = k < lit ? (k >= n - 2 ? 'clip' : k >= n - 4 ? 'hot' : 'on') : '';
      if (p > 0 && k === p - 1) c = (c ? c + ' ' : '') + 'peak';
      b[k].className = c;
    }
  }
  let lv = 0, rv = 0;
  function set(l, r) {
    lv = l; rv = r;
    paint(bars[0], l, pkL); paint(bars[1], r, pkR);
    onChange([l, r], 'L ' + Math.round(l * 100) + ' · R ' + Math.round(r * 100));
  }
  return { el, get: () => [lv, rv], set };
};

/* 12 mini 4-bar signal — compact activity meter; set(level) */
GW.miniSig = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const el = document.createElement('span'); el.className = 'sig';
  el.innerHTML = '<i></i><i></i><i></i><i></i>';
  host.appendChild(el);
  let v = 0;
  function set(l) {
    v = l;
    const b = el.children, lit = Math.round(l * 4);
    for (let k = 0; k < 4; k++) b[k].className = k < lit ? (k >= 3 ? 'clip' : k >= 2 ? 'hot' : 'on') : '';
    onChange(l, Math.round(l * 100) + '%');
  }
  return { el, get: () => v, set };
};

/* 13 signal ladder — stepped 0-4 strength; click cycles */
GW.signalLadder = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 3;
  const el = document.createElement('span'); el.className = 'ladder';
  el.innerHTML = '<i></i><i></i><i></i><i></i>';
  host.appendChild(el);
  function set(nv) {
    v = nv;
    const bars = el.children;
    for (let i = 0; i < bars.length; i++) bars[i].style.background = i < v ? 'var(--gold)' : 'var(--wash)';
    onChange(v, v + '/4');
  }
  el.onclick = () => set((v + 1) % 5);
  set(v);
  return { el, get: () => v, set };
};

/* 14 linear fuel bar — one 0-100 bar, warn tint under the threshold; drag to set */
GW.fuelBar = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const warnAt = opts.warnAt ?? 20;
  let v = opts.value ?? 50;
  const el = document.createElement('div'); el.className = 'bar';
  el.innerHTML = '<span></span>';
  host.appendChild(el);
  const fill = el.querySelector('span');
  function set(p) {
    v = p;
    fill.style.width = p + '%';
    el.classList.toggle('warn', p < warnAt);
    onChange(p, Math.round(p) + '%');
  }
  dragX(el, set);
  set(v);
  return { el, get: () => v, set };
};

/* 15 radial ring — percentage donut; drag up/down to set */
GW.radialRing = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 68;
  const el = document.createElement('span'); el.className = 'ring';
  el.innerHTML = '<b></b>';
  host.appendChild(el);
  const num = el.querySelector('b');
  function set(nv) {
    v = nv;
    el.style.setProperty('--p', v);
    num.textContent = Math.round(v);
    onChange(v, Math.round(v) + '%');
  }
  dragDelta(el, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el, get: () => v, set };
};

/* 16 sparkline — rolling history trace; push(v) appends a sample, fill(v) levels it */
GW.sparkline = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const n = opts.samples || 40;
  const hist = Array.from({ length: n }, () => opts.value ?? 0.5);
  const el = document.createElement('span'); el.className = 'spark';
  el.innerHTML = '<svg viewBox="0 0 170 44" preserveAspectRatio="none"><polyline fill="none" stroke="var(--gold-hi)" stroke-width="1.5"/></svg>';
  host.appendChild(el);
  const line = el.querySelector('polyline');
  const clamp = x => Math.max(0, Math.min(1, x));
  function paint() {
    line.setAttribute('points', hist.map((v, i) => `${i / (n - 1) * 170},${44 - clamp(v) * 40 - 2}`).join(' '));
    onChange(hist[n - 1], String(Math.round(clamp(hist[n - 1]) * 100)));
  }
  function push(v) { hist.push(v); hist.shift(); paint(); }
  function fill(v) { hist.fill(v); paint(); }
  return { el, get: () => hist[n - 1], push, fill };
};

/* 17 waveform strip — sampled trace; set(samples, amp) with samples in -1..1 */
GW.waveStrip = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const el = document.createElement('span'); el.className = 'wave';
  el.innerHTML = '<svg viewBox="0 0 170 38" preserveAspectRatio="none"><path fill="none" stroke="var(--gold)" stroke-width="1.2"/></svg>';
  host.appendChild(el);
  const path = el.querySelector('path');
  let amp = 0;
  function set(samples, a) {
    amp = a;
    let d = 'M0 19';
    if (samples.length < 2) d += ' L170 19';
    else for (let i = 0; i < samples.length; i++)
      d += ` L${(i / (samples.length - 1) * 170).toFixed(1)} ${(19 + samples[i] * 14).toFixed(1)}`;
    path.setAttribute('d', d);
    onChange(amp, 'amp ' + Math.round(amp * 100) + '%');
  }
  set([], opts.amp ?? 0.6);
  return { el, get: () => amp, set };
};

/* N11 oscilloscope — sampled phosphor trace; set(samples, vpp) with samples in -1..1 */
GW.scope = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const el = document.createElement('span'); el.className = 'scope';
  el.innerHTML = '<span class="grat"></span><svg viewBox="0 0 176 78" preserveAspectRatio="none"><polyline/></svg>';
  host.appendChild(el);
  const line = el.querySelector('polyline');
  let vpp = 0;
  function set(samples, v) {
    vpp = v;
    const n = samples.length;
    line.setAttribute('points', samples.map((s, i) => `${(i / (n - 1) * 176).toFixed(1)},${(39 + s * 22).toFixed(1)}`).join(' '));
    onChange(vpp, 'Vpp ' + Math.round(vpp * 100));
  }
  return { el, get: () => vpp, set };
};

/* N12 spectrum / EQ bars — set(values) paints one column per band */
GW.eqBars = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const bands = opts.bands || 11, cells = opts.cells || 9;
  const el = document.createElement('span'); el.className = 'eq';
  host.appendChild(el);
  for (let b = 0; b < bands; b++) {
    const band = document.createElement('span'); band.className = 'band';
    for (let s = 0; s < cells; s++) band.appendChild(document.createElement('i'));
    el.appendChild(band);
  }
  let vals = [];
  function set(values) {
    vals = values;
    let peak = 0;
    for (let b = 0; b < bands; b++) {
      const col = el.children[b].children, val = values[b], lit = Math.round(val * cells);
      peak = Math.max(peak, val);
      for (let k = 0; k < cells; k++) {
        let c = '';
        if (k < lit) c = (k >= cells - 1 ? 'clip' : k >= cells - 3 ? 'hot' : 'on');
        col[k].className = c;
      }
    }
    onChange(vals, 'peak ' + Math.round(peak * 100) + '%');
  }
  return { el, get: () => vals, set };
};

/* N13 crossed-needle meter — one drive value, FWD and RFL needles cross */
GW.crossNeedle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 55;
  const el = document.createElement('div'); el.className = 'crossm';
  el.innerHTML = `<div class="face"><div class="arc"></div><div class="nA"></div><div class="nB"></div></div>
     <div class="lbl"><span>FWD</span><span>RFL</span></div>`;
  host.appendChild(el);
  const face = el.querySelector('.face'), nA = el.querySelector('.nA'), nB = el.querySelector('.nB');
  function set(nv) {
    v = nv;
    const fwd = v, rfl = v * 0.68;
    nA.style.transform = `rotate(${-42 + fwd / 100 * 84}deg)`;
    nB.style.transform = `rotate(${42 - rfl / 100 * 84}deg)`;
    onChange(v, 'FWD ' + Math.round(fwd) + ' · RFL ' + Math.round(rfl));
  }
  dragDelta(face, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el, get: () => v, set };
};

/* N14 thermometer column — mercury rises with the value */
GW.thermometer = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 58;
  const el = document.createElement('div'); el.className = 'thermo';
  el.innerHTML = `<div class="scale"><span>90</span><span>60</span><span>30</span></div>
     <div class="wrapcol"><div class="tube"><div class="fill"></div></div><div class="bulb"></div></div>`;
  host.appendChild(el);
  const fill = el.querySelector('.fill');
  function set(nv) {
    v = nv;
    fill.style.height = v + '%';
    onChange(v, Math.round(30 + v / 100 * 60) + '°');
  }
  dragDelta(el, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el, get: () => v, set };
};

/* N15 bourdon pressure gauge — needle over a printed arc with a redline */
GW.bourdon = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let v = opts.value ?? 45;
  const el = document.createElement('div'); el.className = 'bourdon';
  el.innerHTML = `<svg viewBox="0 0 82 82"><path d="M14 62 A34 34 0 0 1 68 62" fill="none" stroke="#2c2f32" stroke-width="3"/>
       <path d="M52 22 A34 34 0 0 1 68 62" fill="none" stroke="#cb6b4d" stroke-width="3"/></svg>
     <div class="ndl"></div><div class="hub"></div><div class="cap">PSI</div>`;
  host.appendChild(el);
  const ndl = el.querySelector('.ndl');
  function set(nv) {
    v = nv;
    ndl.style.transform = `rotate(${-60 + v / 100 * 120}deg)`;
    onChange(v, Math.round(v / 100 * 160) + ' PSI');
  }
  dragDelta(el, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el, get: () => v, set };
};

/* N16 strip-chart recorder — scrolling history, pen rides the newest value;
   push(v) appends, set(samples, current) replaces the trace (values 0..1) */
GW.stripChart = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const n = opts.samples || 60;
  const hist = Array.from({ length: n }, () => opts.value ?? 0.5);
  const el = document.createElement('span'); el.className = 'strip';
  el.innerHTML = '<span class="rule"></span><svg viewBox="0 0 176 62" preserveAspectRatio="none"><polyline/></svg><span class="pen" style="top:31px"></span>';
  host.appendChild(el);
  const line = el.querySelector('polyline'), pen = el.querySelector('.pen');
  const clamp = x => Math.max(0, Math.min(1, x));
  const yPx = v => 59 - clamp(v) * 56;
  function paint(current) {
    line.setAttribute('points', hist.map((v, i) => `${i / (n - 1) * 176},${yPx(v).toFixed(1)}`).join(' '));
    pen.style.top = yPx(current) + 'px';
    onChange(current, String(Math.round(clamp(current) * 100)));
  }
  function push(v) { hist.push(v); hist.shift(); paint(v); }
  function set(samples, current) {
    for (let i = 0; i < n; i++) hist[i] = samples[i] ?? 0.5;
    paint(current ?? hist[n - 1]);
  }
  return { el, get: () => hist[n - 1], push, set };
};

/* N17 correlation meter — needle rests at 0 and swings ±; drag left/right */
GW.corrMeter = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  let p = opts.value ?? 58;
  const el = document.createElement('div'); el.className = 'corr';
  el.innerHTML = `<div class="face"><div class="arc"></div><div class="zero"></div><div class="ndl"></div></div>
     <div class="lbl"><span>−1</span><span>0</span><span>+1</span></div>`;
  host.appendChild(el);
  const ndl = el.querySelector('.ndl');
  function set(np) {
    p = np;
    const v = (p - 50) / 50;
    ndl.style.transform = `rotate(${v * 38}deg)`;
    onChange(v, (v >= 0 ? '+' : '') + v.toFixed(2));
  }
  dragX(el, set);
  set(p);
  return { el, get: () => p, set };
};

/* N18 battery-cell gauge — charge as discrete cells, the low end warns */
GW.battCells = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const cells = opts.cells || 8, warnAt = opts.warnAt ?? 25;
  let p = opts.value ?? 62;
  const el = document.createElement('div'); el.className = 'batt';
  el.innerHTML = '<div class="cells"></div><span class="nub"></span>';
  host.appendChild(el);
  const cc = el.querySelector('.cells');
  for (let i = 0; i < cells; i++) { const c = document.createElement('span'); c.className = 'cell'; cc.appendChild(c); }
  function set(np) {
    p = np;
    const lit = Math.round(p / 100 * cells);
    for (let i = 0; i < cells; i++) cc.children[i].className = 'cell' + (i < lit ? ' on' : '') + ((p <= warnAt && i < lit) ? ' warn' : '');
    onChange(p, Math.round(p) + '%');
  }
  dragX(el, set);
  set(p);
  return { el, get: () => p, set };
};

/* R01 moving-coil VU — pivot below the face, authentic nonlinear dB scale;
   set(t) positions instantly (0..1.02); ballistics belong to the signal owner */
GW.mcVu = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 150, 96);
  const cx = 75, cy = 112, sweep = t => -43 + t * 86;
  const glassId = uid('vuGlass'), clipId = uid('vuFace');
  const defs = svgEl(s, 'defs', {});
  const g1 = svgEl(defs, 'linearGradient', { id: glassId, x1: 0, y1: 0, x2: 0, y2: 1 });
  svgEl(g1, 'stop', { offset: '0', 'stop-color': 'rgba(255,255,255,.13)' });
  svgEl(g1, 'stop', { offset: '.35', 'stop-color': 'rgba(255,255,255,0)' });
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'rect', { x: 8, y: 8, width: 134, height: 74, rx: 3 });
  svgEl(s, 'rect', { x: .5, y: .5, width: 149, height: 95, rx: 7, fill: '#16130f', stroke: '#060505' });
  svgEl(s, 'rect', { x: 8, y: 8, width: 134, height: 74, rx: 3, fill: 'var(--cream)' });
  const face = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const arcPt = t => polar(cx, cy, 58, sweep(t));
  const [ax1, ay1] = arcPt(0), [ax2, ay2] = arcPt(1);
  svgEl(face, 'path', { d: `M ${ax1} ${ay1} A 58 58 0 0 1 ${ax2} ${ay2}`, fill: 'none', stroke: '#3a3128', 'stroke-width': 1.2 });
  const [rx1, ry1] = arcPt(.75);
  svgEl(face, 'path', { d: `M ${rx1} ${ry1} A 58 58 0 0 1 ${ax2} ${ay2}`, fill: 'none', stroke: 'var(--fail)', 'stroke-width': 3.5 });
  for (const [db, t] of VUDB) {
    const a = sweep(t), [x1, y1] = polar(cx, cy, 55, a), [x2, y2] = polar(cx, cy, 63, a);
    svgEl(face, 'line', { x1, y1, x2, y2, stroke: db > 0 ? 'var(--fail)' : '#3a3128', 'stroke-width': 1.1 });
  }
  for (const [db, t] of VUDB) {
    if (![-20, -10, -5, -3, 0, 1, 2, 3].includes(db)) continue;
    const [x, y] = polar(cx, cy, 69, sweep(t));
    svgEl(face, 'text', {
      x, y: y + 2, 'text-anchor': 'middle', 'font-size': 5.8, 'font-family': 'var(--mono)',
      fill: db > 0 ? 'var(--fail)' : '#3a3128'
    }).textContent = Math.abs(db);
  }
  svgEl(face, 'text', {
    x: 75, y: 78, 'text-anchor': 'middle', 'font-size': 11, 'font-weight': 700,
    'font-family': 'var(--mono)', fill: '#3a3128'
  }).textContent = 'VU';
  const needle = svgEl(face, 'line', {
    x1: cx, y1: cy, x2: cx, y2: cy - 62, stroke: '#1a1613', 'stroke-width': 1.6,
    transform: `rotate(${sweep(.35)},${cx},${cy})`
  });
  svgEl(face, 'circle', { cx, cy: 88, r: 9, fill: '#16130f' });
  svgEl(s, 'rect', { x: 8, y: 8, width: 134, height: 74, rx: 3, fill: `url(#${glassId})` });
  let t = opts.value ?? .35;
  function set(nt) {
    t = Math.max(0, Math.min(1.02, nt));
    needle.setAttribute('transform', `rotate(${sweep(Math.min(1, t))},${cx},${cy})`);
    const db = vuDb(Math.min(1, t));
    onChange(t, (db > 0 ? '+' : '') + db.toFixed(1) + ' VU');
  }
  return { el: s, get: () => t, set };
};

/* R07 round panel meter — porthole bezel, same VU law as R01; drag up/down */
GW.roundMeter = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 110, 104);
  const cx = 55, fy = 54, py = 74, sweep = t => -40 + t * 80;
  const clipId = uid('rndFace');
  const defs = svgEl(s, 'defs', {});
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'circle', { cx, cy: fy, r: 40 });
  svgEl(s, 'circle', { cx, cy: fy, r: 48, fill: '#141110', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy: fy, r: 40, fill: 'var(--cream)' });
  const g = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const pt = (r, t) => polar(cx, py, r, sweep(t));
  const [ax1, ay1] = pt(44, 0), [ax2, ay2] = pt(44, 1);
  svgEl(g, 'path', { d: `M ${ax1} ${ay1} A 44 44 0 0 1 ${ax2} ${ay2}`, fill: 'none', stroke: '#3a3128', 'stroke-width': 1.1 });
  const [rzx, rzy] = pt(44, .75);
  svgEl(g, 'path', { d: `M ${rzx} ${rzy} A 44 44 0 0 1 ${ax2} ${ay2}`, fill: 'none', stroke: 'var(--fail)', 'stroke-width': 3 });
  for (const [db, t] of VUDB) {
    const [x1, y1] = pt(41.5, t), [x2, y2] = pt(47, t);
    svgEl(g, 'line', { x1, y1, x2, y2, stroke: db > 0 ? 'var(--fail)' : '#3a3128', 'stroke-width': 1 });
  }
  for (const [db, t] of VUDB) {
    if (![-20, -10, -5, -3, 0, 3].includes(db)) continue;
    const [x, y] = pt(52, t);
    svgEl(g, 'text', {
      x, y: y + 2, 'text-anchor': 'middle', 'font-size': 5.5, 'font-family': 'var(--mono)',
      fill: db > 0 ? 'var(--fail)' : '#3a3128'
    }).textContent = Math.abs(db);
  }
  svgEl(g, 'text', {
    x: cx, y: fy + 14, 'text-anchor': 'middle', 'font-size': 8, 'font-weight': 700,
    'font-family': 'var(--mono)', fill: '#3a3128'
  }).textContent = 'dB';
  const needle = svgEl(g, 'line', {
    x1: cx, y1: py, x2: cx, y2: py - 46, stroke: '#1a1613', 'stroke-width': 1.5,
    transform: `rotate(0,${cx},${py})`
  });
  svgEl(g, 'circle', { cx, cy: py, r: 5, fill: '#141110' });
  svgEl(s, 'ellipse', { cx: cx - 8, cy: fy - 22, rx: 20, ry: 9, fill: 'rgba(255,255,255,.07)', transform: `rotate(-18,${cx - 8},${fy - 22})` });
  let v = opts.value ?? 50;
  function set(nv) {
    v = nv;
    const t = Math.max(0, Math.min(1, v / 100));
    needle.setAttribute('transform', `rotate(${-40 + t * 80},${cx},${py})`);
    const db = vuDb(t);
    onChange(v, (db > 0 ? '+' : '') + db.toFixed(1) + ' dB');
  }
  dragDelta(s, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el: s, get: () => v, set };
};

/* R08 chrome MIN/MAX indicator — dark pointer over a brushed dome */
GW.chromeMinMax = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 110, 104);
  const cx = 55, cy = 58;
  gradDef('chrRing', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#eceef0'], ['.5', '#9aa0a8'], ['1', '#54585e']]);
  gradDef('chrDome', 'radialGradient', { cx: '48%', cy: '20%', r: '85%' }, [['0', '#e6e8ec'], ['1', '#82878f']]);
  svgEl(s, 'circle', { cx, cy: 54, r: 47, fill: 'url(#chrRing)' });
  svgEl(s, 'circle', { cx, cy: 54, r: 40, fill: '#101214', stroke: '#2c2f33', 'stroke-width': 1 });
  svgEl(s, 'path', { d: `M 21 60 A 34 34 0 0 1 89 60 Z`, fill: 'url(#chrDome)', stroke: '#55595f', 'stroke-width': .5 });
  for (const r of [14, 22, 30])
    svgEl(s, 'path', { d: `M ${cx - r} 60 A ${r} ${r} 0 0 1 ${cx + r} 60`, fill: 'none', stroke: 'rgba(255,255,255,.13)', 'stroke-width': .7 });
  const ptr = svgEl(s, 'line', { x1: cx, y1: cy - 10, x2: cx, y2: cy - 31, stroke: '#17191b', 'stroke-width': 2.2, 'stroke-linecap': 'round' });
  svgEl(s, 'circle', { cx, cy, r: 6, fill: '#23262a' });
  for (let k = 0; k < 8; k++) {
    const [x, y] = polar(cx, cy, 6, k * 45);
    svgEl(s, 'circle', { cx: x, cy: y, r: 1.3, fill: '#23262a' });
  }
  svgEl(s, 'circle', { cx, cy, r: 1.6, fill: '#0c0d0e' });
  svgEl(s, 'text', {
    x: 24, y: 66, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.05em',
    'font-family': 'var(--mono)', fill: '#d7dade'
  }).textContent = 'MIN';
  svgEl(s, 'text', {
    x: 86, y: 66, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.05em',
    'font-family': 'var(--mono)', fill: '#d7dade'
  }).textContent = 'MAX';
  svgEl(s, 'text', {
    x: cx, y: 84, 'text-anchor': 'middle', 'font-size': 7, 'font-style': 'italic',
    'font-family': 'var(--mono)', fill: '#787c82'
  }).textContent = 'dupre.';
  svgEl(s, 'ellipse', { cx: 47, cy: 34, rx: 22, ry: 9, fill: 'rgba(255,255,255,.10)', transform: 'rotate(-16,47,34)' });
  let v = opts.value ?? 50;
  function set(nv) {
    v = Math.max(0, Math.min(100, nv));
    ptr.setAttribute('transform', `rotate(${-55 + v / 100 * 110},${cx},${cy})`);
    onChange(v, v <= 2 ? 'MIN' : v >= 98 ? 'MAX' : Math.round(v) + '%');
  }
  dragDelta(s, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el: s, get: () => v, set };
};

/* R09 black-face aviation gauge — zone arcs per the airspeed-indicator scheme */
GW.aviationGauge = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg drag', 110, 104);
  const cx = 55, cy = 52, sweep = t => -135 + t * 270;
  def('avGlow', d => {
    const fl = svgEl(d, 'filter', { id: 'avGlow', x: '-60%', y: '-60%', width: '220%', height: '220%' });
    svgEl(fl, 'feGaussianBlur', { in: 'SourceGraphic', stdDeviation: 1.4 });
  });
  svgEl(s, 'circle', { cx, cy, r: 47, fill: '#1b1917', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 41, fill: '#0a0908', stroke: '#3a352c', 'stroke-width': 1 });
  const zone = (t1, t2, color) => {
    const [x1, y1] = polar(cx, cy, 37, sweep(t1)), [x2, y2] = polar(cx, cy, 37, sweep(t2));
    svgEl(s, 'path', { d: `M ${x1} ${y1} A 37 37 0 ${(t2 - t1) > .5 ? 1 : 0} 1 ${x2} ${y2}`, fill: 'none', stroke: color, 'stroke-width': 3, opacity: .85 });
  };
  zone(.15, .6, 'var(--pass)'); zone(.6, .85, 'var(--gold)'); zone(.85, 1, 'var(--fail)');
  for (let i = 0; i <= 40; i++) {
    const t = i / 40, major = i % 5 === 0, a = sweep(t);
    const [x1, y1] = polar(cx, cy, 40, a), [x2, y2] = polar(cx, cy, major ? 32 : 36, a);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--gold)', 'stroke-width': major ? 1.6 : .8, opacity: major ? 1 : .7 });
    if (major) {
      const [nx, ny] = polar(cx, cy, 25, a);
      svgEl(s, 'text', {
        x: nx, y: ny + 2.4, 'text-anchor': 'middle', 'font-size': 6.5, 'font-family': 'var(--mono)',
        fill: 'var(--gold-hi)'
      }).textContent = i / 5;
    }
  }
  svgEl(s, 'text', {
    x: cx, y: cy + 16, 'text-anchor': 'middle', 'font-size': 5.5, 'letter-spacing': '.14em',
    'font-family': 'var(--mono)', fill: 'var(--gold)', opacity: .8
  }).textContent = '×100 RPM';
  const needle = svgEl(s, 'g', {});
  svgEl(needle, 'line', {
    x1: cx, y1: cy + 8, x2: cx, y2: cy - 30, stroke: 'var(--gold-hi)', 'stroke-width': 4,
    'stroke-linecap': 'round', opacity: .5, filter: 'url(#avGlow)'
  });
  svgEl(needle, 'line', {
    x1: cx, y1: cy + 8, x2: cx, y2: cy - 30, stroke: 'var(--gold-hi)', 'stroke-width': 2.2,
    'stroke-linecap': 'round'
  });
  svgEl(s, 'circle', { cx, cy, r: 5, fill: '#1b1917', stroke: '#3a352c' });
  svgEl(s, 'ellipse', { cx: cx - 10, cy: cy - 24, rx: 18, ry: 8, fill: 'rgba(255,255,255,.05)', transform: `rotate(-18,${cx - 10},${cy - 24})` });
  let v = opts.value ?? 52;
  function set(nv) {
    v = Math.max(0, Math.min(100, nv));
    needle.setAttribute('transform', `rotate(${-135 + v / 100 * 270},${cx},${cy})`);
    onChange(v, (v / 100 * 8).toFixed(1) + ' ×100 rpm');
  }
  dragDelta(s, () => v, set, { min: 0, max: 100 });
  set(v);
  return { el: s, get: () => v, set };
};

/* R13 edgewise strip meter — compressed log scale, the bar rides the edge */
GW.edgeMeter = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const SCALE = [[0, .08], [3, .26], [6, .44], [12, .62], [20, .78], [40, .94]];
  const s = stageSvg(host, 'rsvg drag', 70, 130);
  const wy0 = 12, wy1 = 118;
  const faceId = uid('edgeFace');
  const defs = svgEl(s, 'defs', {});
  const pg = svgEl(defs, 'linearGradient', { id: faceId, x1: 0, y1: 0, x2: 1, y2: 0 });
  svgEl(pg, 'stop', { offset: '0', 'stop-color': '#efe6ca' });
  svgEl(pg, 'stop', { offset: '1', 'stop-color': '#d9cfae' });
  svgEl(s, 'rect', { x: 8, y: 6, width: 54, height: 118, rx: 8, fill: '#171412', stroke: '#060505', 'stroke-width': 1.5 });
  svgEl(s, 'rect', { x: 14, y: wy0, width: 42, height: wy1 - wy0, fill: `url(#${faceId})`, stroke: '#0a0908' });
  const yOf = f => wy0 + f * (wy1 - wy0);
  for (const [db, f] of SCALE) {
    const y = yOf(f);
    svgEl(s, 'line', { x1: 19, y1: y, x2: 40, y2: y, stroke: '#3a3128', 'stroke-width': 1 });
    svgEl(s, 'text', {
      x: 52, y: y + 2.4, 'text-anchor': 'end', 'font-size': 7, 'font-family': 'var(--mono)',
      fill: '#3a3128'
    }).textContent = db;
  }
  for (let i = 0; i < SCALE.length - 1; i++) {
    const y = yOf((SCALE[i][1] + SCALE[i + 1][1]) / 2);
    svgEl(s, 'line', { x1: 19, y1: y, x2: 32, y2: y, stroke: '#3a3128', 'stroke-width': .6, opacity: .7 });
  }
  const bar = svgEl(s, 'polygon', { points: '56,0 24,-1.4 24,1.4', fill: '#1a1613' });
  svgEl(s, 'rect', { x: 14, y: wy0, width: 42, height: 24, fill: 'rgba(255,255,255,.08)' });
  let frac = opts.value ?? .62;
  function set(f) {
    frac = Math.max(.08, Math.min(.94, f));
    bar.setAttribute('transform', `translate(0,${wy0 + frac * (wy1 - wy0)})`);
    let i = 0; while (i < SCALE.length - 2 && SCALE[i + 1][1] < frac) i++;
    const [d1, f1] = SCALE[i], [d2, f2] = SCALE[i + 1];
    const db = d1 + (d2 - d1) * Math.max(0, Math.min(1, (frac - f1) / (f2 - f1)));
    onChange(frac, '−' + db.toFixed(1) + ' dB');
  }
  dragY(s, pct => set(.08 + (100 - pct) / 100 * .86));
  set(frac);
  return { el: s, get: () => frac, set };
};

/* R17 round CRT scope — pale phosphor face; the trace is the widget's own
   animation, so it lives here with its reduced-motion gate */
GW.roundCrt = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 110, 104);
  const cx = 55, cy = 52;
  const faceId = uid('rcrtFace'), clipId = uid('rcrtClip');
  gradDef('sfScrew', 'radialGradient', { cx: '40%', cy: '35%', r: '75%' }, [['0', '#9b968a'], ['1', '#4a463e']]);
  def('avGlow', d => {
    const fl = svgEl(d, 'filter', { id: 'avGlow', x: '-60%', y: '-60%', width: '220%', height: '220%' });
    svgEl(fl, 'feGaussianBlur', { in: 'SourceGraphic', stdDeviation: 1.4 });
  });
  /* the face gradient reads screen-family vars from this widget's subtree,
     so it must live in the local defs, not the shared def sink */
  const defs = svgEl(s, 'defs', {});
  const ph = svgEl(defs, 'radialGradient', { id: faceId, cx: '50%', cy: '44%', r: '70%' });
  svgEl(ph, 'stop', { offset: '0', 'stop-color': 'var(--crt-face1,#b9d8c0)' });
  svgEl(ph, 'stop', { offset: '1', 'stop-color': 'var(--crt-face2,#8bb296)' });
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'circle', { cx, cy, r: 38 });
  svgEl(s, 'circle', { cx, cy, r: 48, fill: '#141110', stroke: '#060505', 'stroke-width': 2 });
  for (let k = 0; k < 4; k++) {
    const [x, y] = polar(cx, cy, 43, 45 + k * 90);
    svgEl(s, 'circle', { cx: x, cy: y, r: 2.6, fill: 'url(#sfScrew)', stroke: '#0a0908', 'stroke-width': .5 });
  }
  svgEl(s, 'circle', { cx, cy, r: 38, fill: `url(#${faceId})` });
  const g = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  for (let i = -4; i <= 4; i++) {
    svgEl(g, 'line', { x1: cx + i * 9, y1: cy - 38, x2: cx + i * 9, y2: cy + 38, stroke: 'var(--scr-dim,#3d5c46)', 'stroke-width': i === 0 ? .9 : .5, opacity: .8 });
    svgEl(g, 'line', { x1: cx - 38, y1: cy + i * 9, x2: cx + 38, y2: cy + i * 9, stroke: 'var(--scr-dim,#3d5c46)', 'stroke-width': i === 0 ? .9 : .5, opacity: .8 });
  }
  const glow = svgEl(g, 'polyline', { points: '', fill: 'none', stroke: 'var(--crt-glow,#eef7ee)', 'stroke-width': 3, opacity: .35, filter: 'url(#avGlow)' });
  const trace = svgEl(g, 'polyline', { points: '', fill: 'none', stroke: '#f4fcf4', 'stroke-width': 1.3 });
  svgEl(s, 'ellipse', { cx: cx - 10, cy: cy - 16, rx: 20, ry: 10, fill: 'rgba(255,255,255,.10)', transform: `rotate(-20,${cx - 10},${cy - 16})` });
  let tph = 0;
  function tick() {
    tph += 0.12;
    const amp = 8 + 3 * Math.sin(tph * 0.35);
    let pts = '';
    for (let x = -38; x <= 38; x += 2) {
      const y = Math.sin(x * 0.55 + tph * 2.5) * amp;
      pts += `${cx + x},${(cy + y).toFixed(1)} `;
    }
    trace.setAttribute('points', pts.trim());
    glow.setAttribute('points', pts.trim());
    onChange(amp, 'Vpp ' + Math.round(amp * 2 * 4.5));
  }
  tick();
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches) setInterval(tick, 80);
  return { el: s, tick };
};

/* R43 attitude indicator — sky/ground roll+shift behind a fixed miniature aircraft; 2D drag */
GW.attitudeIndicator = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 130, 130);
  const cx = 65, cy = 65;
  const clipId = uid('aiClip');
  gradDef('aiSky', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#54677d'], ['1', '#3a4c60']]);
  gradDef('aiGnd', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#5c4630'], ['1', '#3c2e1e']]);
  const defs = svgEl(s, 'defs', {});
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'circle', { cx, cy, r: 48 });
  svgEl(s, 'circle', { cx, cy, r: 56, fill: '#14110e', stroke: '#060505', 'stroke-width': 2 });
  const g = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const ball = svgEl(g, 'g', {});
  svgEl(ball, 'rect', { x: cx - 90, y: cy - 180, width: 180, height: 180, fill: 'url(#aiSky)' });
  svgEl(ball, 'rect', { x: cx - 90, y: cy, width: 180, height: 180, fill: 'url(#aiGnd)' });
  svgEl(ball, 'line', { x1: cx - 90, y1: cy, x2: cx + 90, y2: cy, stroke: '#f3e7c5', 'stroke-width': 1.4 });
  for (const p of [-20, -10, 10, 20]) {
    const y = cy - p * 1.6, w = p % 20 === 0 ? 16 : 10;
    svgEl(ball, 'line', { x1: cx - w, y1: y, x2: cx + w, y2: y, stroke: '#f3e7c5', 'stroke-width': .8, opacity: .85 });
    svgEl(ball, 'text', {
      x: cx + w + 3, y: y + 2, 'font-size': 4.6, 'font-family': 'var(--mono)',
      fill: '#f3e7c5', opacity: .85
    }).textContent = String(Math.abs(p));
  }
  /* fixed bank scale + pointer + miniature aircraft */
  for (const b of [-60, -45, -30, -20, -10, 0, 10, 20, 30, 45, 60]) {
    const [x1, y1] = polar(cx, cy, 47, b), [x2, y2] = polar(cx, cy, b % 30 === 0 ? 42 : 44, b);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--cream)', 'stroke-width': b === 0 ? 1.6 : .9, opacity: .9 });
  }
  svgEl(s, 'polygon', { points: `${cx - 3.5},${cy - 38} ${cx + 3.5},${cy - 38} ${cx},${cy - 44}`, fill: 'var(--gold-hi)' });
  svgEl(s, 'path', {
    d: `M ${cx - 22} ${cy} L ${cx - 7} ${cy} L ${cx - 4} ${cy + 4} M ${cx + 22} ${cy} L ${cx + 7} ${cy} L ${cx + 4} ${cy + 4}`,
    fill: 'none', stroke: 'var(--gold-hi)', 'stroke-width': 2.4, 'stroke-linecap': 'round'
  });
  svgEl(s, 'circle', { cx, cy, r: 2, fill: 'var(--gold-hi)' });
  let bank = 0, pitch = 0;
  function set(b, p) {
    bank = Math.max(-60, Math.min(60, b)); pitch = Math.max(-20, Math.min(20, p));
    ball.setAttribute('transform', `rotate(${(-bank).toFixed(1)},${cx},${cy}) translate(0,${(pitch * 1.6).toFixed(1)})`);
    onChange({ bank, pitch }, 'BANK ' + (bank < 0 ? 'L' : bank > 0 ? 'R' : '') + Math.abs(Math.round(bank)) +
      ' · PITCH ' + (pitch >= 0 ? '+' : '-') + String(Math.abs(Math.round(pitch))).padStart(2, '0'));
  }
  s.style.touchAction = 'none'; s.style.cursor = 'move';
  s.addEventListener('pointerdown', e => {
    s.setPointerCapture(e.pointerId);
    const x0 = e.clientX, y0 = e.clientY, b0 = bank, p0 = pitch;
    const mv = ev => set(b0 + (ev.clientX - x0) * 0.4, p0 + (ev.clientY - y0) * 0.25);
    const up = () => { s.removeEventListener('pointermove', mv); s.removeEventListener('pointerup', up); s.removeEventListener('pointercancel', up); };
    s.addEventListener('pointermove', mv); s.addEventListener('pointerup', up); s.addEventListener('pointercancel', up); e.preventDefault();
  });
  set(opts.bank ?? 0, opts.pitch ?? 0);
  return { el: s, get: () => ({ bank, pitch }), set };
};

/* R44 heading bug + servo needle — drag parks the command; the needle chases
   with honest servo lag (widget-owned animation, reduced-motion gated) */
GW.headingBug = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 130, 130);
  const cx = 65, cy = 65;
  svgEl(s, 'circle', { cx, cy, r: 56, fill: '#14110e', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 50, fill: '#1a1714', stroke: '#2c2820', 'stroke-width': 1 });
  for (let d = 0; d < 360; d += 10) {
    const maj = d % 30 === 0;
    const [x1, y1] = polar(cx, cy, 48, d), [x2, y2] = polar(cx, cy, maj ? 42 : 45, d);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--cream)', 'stroke-width': maj ? 1 : .5, opacity: maj ? .9 : .5 });
  }
  for (let d = 0; d < 360; d += 30) {
    const lbl = d === 0 ? 'N' : d === 90 ? 'E' : d === 180 ? 'S' : d === 270 ? 'W' : String(d / 10);
    const [x, y] = polar(cx, cy, 35, d);
    svgEl(s, 'text', {
      x, y: y + 2.6, 'text-anchor': 'middle', 'font-size': d % 90 === 0 ? 8 : 6.4, 'font-weight': 700,
      'font-family': 'var(--mono)', fill: d % 90 === 0 ? 'var(--cream)' : 'var(--steel)'
    }).textContent = lbl;
  }
  svgEl(s, 'line', { x1: cx, y1: cy - 56, x2: cx, y2: cy - 48, stroke: 'var(--fail)', 'stroke-width': 2 });
  const bug = svgEl(s, 'path', {
    d: `M ${cx - 6} ${cy - 49} L ${cx - 6} ${cy - 44} L ${cx - 2.5} ${cy - 44} L ${cx} ${cy - 47} L ${cx + 2.5} ${cy - 44} L ${cx + 6} ${cy - 44} L ${cx + 6} ${cy - 49} Z`,
    fill: 'var(--gold-hi)', stroke: '#7d5c16', 'stroke-width': .7
  });
  const needle = svgEl(s, 'g', {});
  svgEl(needle, 'polygon', {
    points: `${cx - 2},${cy + 10} ${cx + 2},${cy + 10} ${cx + 1.2},${cy - 40} ${cx},${cy - 44} ${cx - 1.2},${cy - 40}`,
    fill: '#bfc4d0', stroke: '#4a4e58', 'stroke-width': .6
  });
  svgEl(s, 'circle', { cx, cy, r: 4.5, fill: '#3a3631', stroke: '#060505', 'stroke-width': 1 });
  let cmd = opts.value ?? 90, act = cmd;
  const draw = () => {
    bug.setAttribute('transform', `rotate(${cmd.toFixed(1)},${cx},${cy})`);
    needle.setAttribute('transform', `rotate(${act.toFixed(1)},${cx},${cy})`);
    onChange({ cmd, act }, 'CMD ' + String(Math.round((cmd % 360 + 360) % 360)).padStart(3, '0') +
      ' · ACT ' + String(Math.round((act % 360 + 360) % 360)).padStart(3, '0'));
  };
  function set(v) { cmd = (v % 360 + 360) % 360; draw(); }
  dragDelta(s, () => cmd, set, { min: -100000, max: 100000, sens: 1.2 });
  draw();
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches)
    setInterval(() => {
      const diff = ((cmd - act + 540) % 360) - 180;
      if (Math.abs(diff) < 0.4) { if (act !== cmd) { act = cmd; draw(); } return; }
      act = (act + diff * 0.07 + 360) % 360; draw();
    }, 80);
  return { el: s, get: () => ({ cmd, act }), set };
};

/* R53 circular chart recorder — a day per revolution; the pen draws the cycle
   (widget-owned clock, reduced-motion paints the full day once); click for fresh paper */
GW.chartRecorder = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 130, 130);
  const cx = 65, cy = 65;
  svgEl(s, 'circle', { cx, cy, r: 60, fill: '#17140f', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 54, fill: '#efe9da', stroke: '#8f897b', 'stroke-width': .8 });
  for (const r of [20, 31, 42])
    svgEl(s, 'circle', { cx, cy, r, fill: 'none', stroke: '#b8ae98', 'stroke-width': .5 });
  for (let h = 0; h < 24; h++) {
    const a = h * 15;
    const [x1, y1] = polar(cx, cy, 54, a), [x2, y2] = polar(cx, cy, h % 6 === 0 ? 12 : 48, a);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: '#b8ae98', 'stroke-width': h % 6 === 0 ? .6 : .35, opacity: .8 });
    if (h % 6 === 0) {
      const [tx, ty] = polar(cx, cy, 50, a + 5);
      svgEl(s, 'text', {
        x: tx, y: ty + 2, 'text-anchor': 'middle', 'font-size': 4.6, 'font-family': 'var(--mono)',
        fill: '#6e6552'
      }).textContent = String(h).padStart(2, '0');
    }
  }
  const trace = svgEl(s, 'path', { d: '', fill: 'none', stroke: '#8f2416', 'stroke-width': 1.1, 'stroke-linejoin': 'round' });
  const pen = svgEl(s, 'line', { x1: cx, y1: cy, x2: cx, y2: cy - 54, stroke: '#4a463e', 'stroke-width': 1 });
  const penDot = svgEl(s, 'circle', { cx, cy: cy - 30, r: 2, fill: '#8f2416' });
  svgEl(s, 'circle', { cx, cy, r: 4, fill: '#4a463e' });
  const val = h => 52 + 30 * Math.sin(h / 24 * 2 * Math.PI - 2.1) + 12 * Math.sin(h / 24 * 6 * Math.PI) + 4 * Math.sin(h * 2.7);
  const rOf = v => 12 + Math.max(0, Math.min(100, v)) * 0.36;
  let pts = [], hour = 0;
  const draw = () => {
    const a = hour * 15, r = rOf(val(hour));
    pts.push(polar(cx, cy, r, a));
    if (pts.length > 1) trace.setAttribute('d', 'M ' + pts.map(p => p[0].toFixed(1) + ' ' + p[1].toFixed(1)).join(' L '));
    pen.setAttribute('transform', `rotate(${a},${cx},${cy})`);
    const [px, py] = polar(cx, cy, r, a);
    penDot.setAttribute('cx', px); penDot.setAttribute('cy', py);
    onChange(hour, String(Math.floor(hour)).padStart(2, '0') + ':' + (hour % 1 >= 0.5 ? '30' : '00') + ' · ' + Math.round(val(hour)) + '%');
  };
  const reset = () => { pts = []; hour = 0; trace.setAttribute('d', ''); draw(); };
  s.style.cursor = 'pointer';
  s.addEventListener('click', reset);
  if (matchMedia('(prefers-reduced-motion: reduce)').matches) {
    for (hour = 0; hour < 24; hour += 0.25) draw();
    hour = 23.75;
  } else {
    reset();
    setInterval(() => { hour += 0.25; if (hour >= 24) { pts = []; hour = 0; } draw(); }, 375);
  }
  return { el: s, get: () => hour, reset };
};

/* R54 vertical tape instrument — the scale scrolls behind a fixed index; drag to drive */
GW.verticalTape = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 70, 130);
  const CX = 38, CY = 65;
  const MIN = 5, MAX = 35, PPU = 5.5;            /* rpm x100, px per unit */
  const clipId = uid('vtClip');
  const defs = svgEl(s, 'defs', {});
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'rect', { x: 14, y: 8, width: 48, height: 114, rx: 4 });
  svgEl(s, 'rect', { x: 2, y: 2, width: 66, height: 126, rx: 7, fill: '#1c1916', stroke: '#060505', 'stroke-width': 1.5 });
  svgEl(s, 'rect', { x: 14, y: 8, width: 48, height: 114, rx: 4, fill: '#0d0c0a', stroke: '#2c2820', 'stroke-width': 1 });
  const tapeG = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const tape = svgEl(tapeG, 'g', {});
  for (let u = MIN; u <= MAX; u++) {
    const y = -u * PPU;                          /* higher value further up the tape */
    const maj = u % 5 === 0;
    svgEl(tape, 'line', { x1: maj ? 20 : 26, y1: y, x2: 34, y2: y, stroke: 'var(--cream)', 'stroke-width': maj ? 1.1 : .55, opacity: maj ? .95 : .6 });
    if (maj) svgEl(tape, 'text', {
      x: 48, y: y + 3, 'text-anchor': 'middle', 'font-size': 9, 'font-weight': 700,
      'font-family': 'var(--mono)', fill: 'var(--cream)'
    }).textContent = String(u);
  }
  /* fixed index: side pointer + line across the window at center height */
  svgEl(s, 'polygon', { points: `8,${CY} 15,${CY - 4} 15,${CY + 4}`, fill: 'var(--gold-hi)' });
  svgEl(s, 'line', { x1: 15, y1: CY, x2: 62, y2: CY, stroke: 'var(--gold-hi)', 'stroke-width': 1, opacity: .85 });
  svgEl(s, 'text', {
    x: CX, y: 126, 'text-anchor': 'middle', 'font-size': 5, 'letter-spacing': '.1em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'RPM x100';
  let v = opts.value ?? 24;
  function set(nv) {
    v = Math.max(MIN, Math.min(MAX, nv));
    tape.setAttribute('transform', `translate(0,${(CY + v * PPU).toFixed(1)})`);
    onChange(v, 'RPM ' + Math.round(v * 100));
  }
  s.style.cursor = 'ns-resize';
  dragDelta(s, () => v, set, { min: MIN, max: MAX, sens: (MAX - MIN) / 140 });
  set(v);
  return { el: s, get: () => v, set };
};

/* R55 twin-needle gauge — mirrored half-scales, one hub, two independent needles */
GW.twinNeedle = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 120, 110);
  const cx = 60, cy = 62, R = 44;
  svgEl(s, 'circle', { cx, cy, r: 52, fill: '#14110e', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 46, fill: '#1a1714', stroke: '#2c2820', 'stroke-width': 1 });
  /* mirrored arcs: left = FUEL (0 at bottom-left up to 4 at top), right = OIL */
  const angL = v => -170 + v / 4 * 160;          /* 0..4 -> -170..-10 (left side, cw from top) */
  const angR = v => 170 - v / 4 * 160;           /* 0..4 -> 170..10 (right side) */
  for (let v = 0; v <= 4; v++) {
    for (const ang of [angL(v), angR(v)]) {
      const [x1, y1] = polar(cx, cy, R, ang), [x2, y2] = polar(cx, cy, R - 5, ang);
      svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--cream)', 'stroke-width': 1, opacity: .9 });
      const [tx, ty] = polar(cx, cy, R - 11, ang);
      svgEl(s, 'text', {
        x: tx, y: ty + 2.4, 'text-anchor': 'middle', 'font-size': 6, 'font-family': 'var(--mono)',
        fill: 'var(--cream)'
      }).textContent = String(v);
    }
  }
  for (let v = 0.5; v < 4; v += 0.5) {
    if (v % 1 === 0) continue;
    for (const ang of [angL(v), angR(v)]) {
      const [x1, y1] = polar(cx, cy, R, ang), [x2, y2] = polar(cx, cy, R - 3, ang);
      svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--cream)', 'stroke-width': .5, opacity: .55 });
    }
  }
  svgEl(s, 'text', {
    x: cx - 20, y: cy + 34, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.08em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'FUEL';
  svgEl(s, 'text', {
    x: cx + 20, y: cy + 34, 'text-anchor': 'middle', 'font-size': 5.4, 'letter-spacing': '.08em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'OIL';
  svgEl(s, 'text', {
    x: cx, y: cy - 26, 'text-anchor': 'middle', 'font-size': 4.6, 'letter-spacing': '.06em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'kg/cm2';
  const needle = color => {
    const g = svgEl(s, 'g', {});
    svgEl(g, 'polygon', {
      points: `${cx - 1.6},${cy + 8} ${cx + 1.6},${cy + 8} ${cx + 1},${cy - R + 8} ${cx},${cy - R + 4} ${cx - 1},${cy - R + 8}`,
      fill: color, stroke: 'rgba(0,0,0,.4)', 'stroke-width': .5
    }); return g;
  };
  const nF = needle('#e0523a'), nO = needle('#bfc4d0');
  svgEl(s, 'circle', { cx, cy, r: 5, fill: '#3a3631', stroke: '#060505', 'stroke-width': 1 });
  let vF = opts.fuel ?? 2.4, vO = opts.oil ?? 3.1;
  const draw = () => {
    nF.setAttribute('transform', `rotate(${angL(vF).toFixed(1)},${cx},${cy})`);
    nO.setAttribute('transform', `rotate(${angR(vO).toFixed(1)},${cx},${cy})`);
    onChange([vF, vO], 'FUEL ' + vF.toFixed(1) + ' · OIL ' + vO.toFixed(1));
  };
  function set(f, o) { vF = Math.max(0, Math.min(4, f)); vO = Math.max(0, Math.min(4, o)); draw(); }
  /* each half is its own drag surface */
  const half = (x, get, setV) => {
    const hit = svgEl(s, 'rect', { x, y: 10, width: 60, height: 104, fill: 'transparent' });
    hit.style.cursor = 'ns-resize';
    dragDelta(hit, get, v => { setV(Math.max(0, Math.min(4, v))); draw(); }, { min: 0, max: 4, sens: 4 / 110 });
  };
  half(0, () => vF, v => vF = v);
  half(60, () => vO, v => vO = v);
  draw();
  return { el: s, get: () => [vF, vO], set };
};

/* R56 comfort-zone crossed needles — temp and humidity cross over printed verdicts */
GW.comfortMeter = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 130, 122);
  const cx = 65, cy = 60;
  const clipId = uid('cmClip');
  gradDef('cmBrass', 'linearGradient', { x1: 0, y1: 0, x2: 0, y2: 1 }, [['0', '#d8b25c'], ['.5', '#a07c30'], ['1', '#6e5218']]);
  const defs = svgEl(s, 'defs', {});
  svgEl(s, 'circle', { cx, cy, r: 56, fill: 'url(#cmBrass)', stroke: '#4a3610', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 53, fill: 'none', stroke: '#7a5c1e', 'stroke-width': 2.5, 'stroke-dasharray': '2 1.4' });
  svgEl(s, 'circle', { cx, cy, r: 49, fill: '#efe9da', stroke: '#8f897b', 'stroke-width': 1 });
  const PT = [38, 96], PH = [92, 96];            /* temp pivot (BL), humidity pivot (BR) */
  const angT = t => 105 - (t - 40) / 60 * 70;    /* 40..100F -> bearing 105..35 from PT */
  const angH = h => -105 + h / 100 * 70;         /* 0..100% -> bearing -105..-35 from PH */
  /* scale ticks along each sweep, near the rim */
  for (let t = 40; t <= 100; t += 10) {
    const a = angT(t);
    const [x1, y1] = polar(PT[0], PT[1], 86, a), [x2, y2] = polar(PT[0], PT[1], 82, a);
    if (Math.hypot(x1 - cx, y1 - cy) < 48) {
      svgEl(s, 'line', { x1, y1, x2, y2, stroke: '#3c382f', 'stroke-width': t % 20 === 0 ? 1 : .5 });
      if (t % 20 === 0) {
        const [tx, ty] = polar(PT[0], PT[1], 78, a);
        svgEl(s, 'text', {
          x: tx, y: ty + 2, 'text-anchor': 'middle', 'font-size': 4.6, 'font-family': 'var(--mono)',
          fill: '#3c382f'
        }).textContent = String(t);
      }
    }
  }
  for (let h = 0; h <= 100; h += 10) {
    const a = angH(h);
    const [x1, y1] = polar(PH[0], PH[1], 86, a), [x2, y2] = polar(PH[0], PH[1], 82, a);
    if (Math.hypot(x1 - cx, y1 - cy) < 48) {
      svgEl(s, 'line', { x1, y1, x2, y2, stroke: '#3c382f', 'stroke-width': h % 20 === 0 ? 1 : .5 });
      if (h % 20 === 0) {
        const [tx, ty] = polar(PH[0], PH[1], 78, a);
        svgEl(s, 'text', {
          x: tx, y: ty + 2, 'text-anchor': 'middle', 'font-size': 4.6, 'font-family': 'var(--mono)',
          fill: '#3c382f'
        }).textContent = String(h);
      }
    }
  }
  /* printed zone verdicts; the active one goes red */
  const zones = {};
  const zone = (key, txt, x, y, rot, size) => {
    zones[key] = svgEl(s, 'text', {
      x, y, 'text-anchor': 'middle',
      'font-size': size || 5.2, 'font-weight': 700, 'letter-spacing': '.06em', 'font-family': 'var(--mono)',
      fill: '#8f897b', transform: `rotate(${rot},${x},${y})`
    }); zones[key].textContent = txt;
  };
  zone('humid', 'TOO HUMID', 42, 34, -32);
  zone('warm', 'TOO WARM', 89, 34, 32);
  zone('right', 'JUST RIGHT', 65, 58, 0, 6.2);
  zone('dry', 'TOO DRY', 38, 74, 28);
  zone('cold', 'TOO COLD', 93, 74, -28);
  svgEl(s, 'text', {
    x: cx, y: 92, 'text-anchor': 'middle', 'font-size': 5.6, 'letter-spacing': '.18em',
    'font-family': 'var(--mono)', fill: '#3c382f'
  }).textContent = 'WEATHER STATION';
  /* needles: temp from bottom-left, humidity from bottom-right — clipped to the face */
  const nclip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(nclip, 'circle', { cx, cy, r: 49 });
  const ng = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const needle = () => {
    const g = svgEl(ng, 'g', {});
    svgEl(g, 'line', { x1: 0, y1: 0, x2: 0, y2: -84, stroke: '#c23a28', 'stroke-width': 1.6, 'stroke-linecap': 'round' });
    svgEl(g, 'circle', { cx: 0, cy: 0, r: 2.6, fill: '#8f2416' }); return g;
  };
  const nT = needle(), nH = needle();
  nT.setAttribute('transform', `translate(${PT[0]},${PT[1]})`);
  nH.setAttribute('transform', `translate(${PH[0]},${PH[1]})`);
  let vT = opts.temp ?? 72, vH = opts.humidity ?? 45;
  const verdict = () => vT > 78 ? 'warm' : vT < 62 ? 'cold' : vH > 60 ? 'humid' : vH < 30 ? 'dry' : 'right';
  const draw = () => {
    nT.setAttribute('transform', `translate(${PT[0]},${PT[1]}) rotate(${angT(vT).toFixed(1)})`);
    nH.setAttribute('transform', `translate(${PH[0]},${PH[1]}) rotate(${angH(vH).toFixed(1)})`);
    const v = verdict();
    for (const k of Object.keys(zones)) zones[k].setAttribute('fill', k === v ? '#c23a28' : '#8f897b');
    onChange([vT, vH], Math.round(vT) + 'F · ' + Math.round(vH) + '% RH · ' + zones[v].textContent);
  };
  function set(t, h) { vT = Math.max(40, Math.min(100, t)); vH = Math.max(0, Math.min(100, h)); draw(); }
  const half = (x, get, setV, min, max) => {
    const hit = svgEl(s, 'rect', { x, y: 8, width: 65, height: 106, fill: 'transparent' });
    hit.style.cursor = 'ns-resize';
    dragDelta(hit, get, v => { setV(Math.max(min, Math.min(max, v))); draw(); }, { min, max, sens: (max - min) / 110 });
  };
  half(0, () => vT, v => vT = v, 40, 100);
  half(65, () => vH, v => vH = v, 0, 100);
  draw();
  return { el: s, get: () => [vT, vH], set };
};

/* ================= indicators & readouts ================= */

/* 18 status lamps — one lamp per health state; click any lamp to cycle it */
GW.statusLamps = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const CLS = ['lamp', 'lamp gold', 'lamp red', 'lamp off', 'lamp busy'];
  const NAMES = ['ok', 'engaged', 'fault', 'off', 'busy'];
  const states = (opts.states || [0, 1, 2, 3, 4]).slice();
  const wrap = document.createElement('span');
  wrap.style.cssText = 'display:inline-flex;gap:9px;align-items:center';
  const lamps = states.map((st, i) => {
    const l = document.createElement('span'); l.className = CLS[st]; l.style.cursor = 'pointer';
    l.addEventListener('click', () => set(i, states[i] + 1));
    wrap.appendChild(l); return l;
  });
  host.appendChild(wrap);
  function set(i, st) {
    states[i] = ((st % CLS.length) + CLS.length) % CLS.length;
    lamps[i].className = CLS[states[i]];
    onChange(states.slice(), NAMES[states[i]]);
  }
  onChange(states.slice(), states.length === 5 ? 'five states' : states.length + ' states');
  return { el: wrap, get: () => states.slice(), set };
};

/* 19 badges — labelled flags; click a badge to cycle its variant */
GW.badges = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const CLS = ['badge', 'badge red', 'badge ghost'];
  const items = opts.items || [['TUNNEL', 0], ['LOW BATT', 1], ['2.4G', 2]];
  const vars = items.map(it => it[1]);
  const wrap = document.createElement('span');
  const els = items.map(([txt, v], i) => {
    const b = document.createElement('span'); b.className = CLS[v]; b.textContent = txt; b.style.cursor = 'pointer';
    b.addEventListener('click', () => set(i, vars[i] + 1));
    wrap.appendChild(b);
    if (i < items.length - 1) wrap.appendChild(document.createTextNode(' '));
    return b;
  });
  host.appendChild(wrap);
  function set(i, v) {
    vars[i] = ((v % CLS.length) + CLS.length) % CLS.length;
    els[i].className = CLS[vars[i]];
    onChange(vars.slice(), items[i][0]);
  }
  onChange(vars.slice(), items.length === 3 ? 'three variants' : items.length + ' variants');
  return { el: wrap, get: () => vars.slice(), set };
};

/* 20 tabular readout — mm:ss countdown; builder owns the state, the page
   drives tick() on its own clock (tick contract); click pauses/resumes */
GW.tabularReadout = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const wrap = document.createElement('div'); wrap.style.textAlign = 'center';
  wrap.innerHTML = '<div class="readout"></div><span class="u"></span>';
  const out = wrap.querySelector('.readout');
  wrap.querySelector('.u').textContent = opts.unit || 'timer';
  host.appendChild(wrap);
  let secs, run = opts.run !== undefined ? !!opts.run : true;
  const draw = () => {
    out.textContent = String(Math.floor(secs / 60)).padStart(2, '0') + ':' + String(secs % 60).padStart(2, '0');
    onChange(secs, run ? 'running' : 'paused');
  };
  const set = v => { secs = ((v % 3600) + 3600) % 3600; draw(); };
  out.addEventListener('click', () => { run = !run; draw(); });
  set(opts.secs !== undefined ? opts.secs : 24 * 60 + 10);
  return { el: wrap, get: () => secs, set, tick: () => { if (run) set(secs - 1); } };
};

/* 21 engraved label — hairline-flanked caps label with a count; click bumps 1-9 */
GW.engravedLabel = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const e = document.createElement('span'); e.className = 'engrave';
  e.append(opts.label || 'outputs');
  const c = document.createElement('span'); c.className = 'cnt'; e.appendChild(c);
  host.appendChild(e);
  let n;
  const set = v => { n = v; c.textContent = '· ' + n; onChange(n, 'count ' + n); };
  e.addEventListener('click', () => set(n % 9 + 1));
  set(opts.count !== undefined ? opts.count : 3);
  return { el: e, get: () => n, set };
};

/* 22 output well — streaming step log, lamp per step; click streams the next
   demo step; push([lampCls, name, evidence]) appends programmatically */
GW.outputWell = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const seed = opts.seed || [['', 'Link', 'wlp170s0 · @Hyatt'], ['gold', 'DNS', 'resolving…']];
  const steps = opts.steps || [['gold', 'Probe', '8.8.8.8 …'], ['', 'Gateway', '10.0.0.1 ok'], ['', 'DNS', '1.1.1.1 ok'], ['red', 'Retry', 'timeout']];
  const keep = opts.keep || 5;
  const w = document.createElement('div'); w.className = 'owell'; host.appendChild(w);
  const add = s => {
    const d = document.createElement('div'); d.className = 'ostep';
    d.innerHTML = `<span class="lamp ${s[0]}"></span><span><b>${s[1]}</b><span class="ev">${s[2]}</span></span>`;
    w.appendChild(d); while (w.children.length > keep) w.removeChild(w.firstChild);
  };
  seed.forEach(add);
  const push = s => { add(s); onChange(s, '+ ' + s[1]); };
  let i = 0;
  w.addEventListener('click', () => { i = (i + 1) % steps.length; push(steps[i]); });
  onChange(null, 'click to stream');
  return { el: w, push };
};

/* 23 toast — one-line transient confirmation; click fires the next demo
   message; fire(msg) shows any message with the fade-in */
GW.toast = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const msgs = opts.msgs || ['link up · 300 Mbps', 'bt paired — WH-1000XM4', 'profile switched', 'joined @Hyatt_WiFi — saved'];
  const t = document.createElement('span'); t.className = 'toastw';
  t.textContent = opts.text || msgs[msgs.length - 1];
  host.appendChild(t);
  const fire = msg => {
    t.textContent = msg; t.style.opacity = '0';
    requestAnimationFrame(() => { t.style.transition = 'opacity .3s'; t.style.opacity = '1'; });
  };
  let n = 0;
  t.addEventListener('click', () => { n++; fire(msgs[n % msgs.length]); onChange(n, 'fired ' + n); });
  onChange(0, 'click to fire');
  return { el: t, fire };
};

/* 26 nixie tubes — one lit numeral per tube, leading zeros dark; click increments */
GW.nixie = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const digits = opts.digits || 2;
  const max = Math.pow(10, digits);
  const nx = document.createElement('span'); nx.className = 'nixie';
  for (let i = 0; i < digits; i++) {
    const tu = document.createElement('span'); tu.className = 'tube'; tu.innerHTML = '<b></b>'; nx.appendChild(tu);
  }
  host.appendChild(nx);
  let v;
  const set = x => {
    v = ((x % max) + max) % max;
    const s = String(v).padStart(digits, '0');
    [...nx.children].forEach((tu, i) => {
      tu.classList.toggle('off', i < digits - 1 && v < Math.pow(10, digits - 1 - i));
      tu.querySelector('b').textContent = s[i];
    });
    onChange(v, s);
  };
  nx.addEventListener('click', () => set(v + 1));
  set(opts.value !== undefined ? opts.value : 8);
  return { el: nx, get: () => v, set };
};

/* N20 split-flap — windows flip to the next word with the mechanical clack;
   the page drives next() on its own cadence; first paint is silent like the original */
GW.splitFlap = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const words = opts.words || ['DNS ', 'LINK', 'SYNC', 'WIFI', 'SCAN'];
  const animate = opts.animate !== undefined ? !!opts.animate : true;
  const cells = opts.cells || 3;
  const f = document.createElement('span'); f.className = 'flap';
  for (let i = 0; i < cells; i++) {
    const d = document.createElement('span'); d.className = 'flapd'; d.innerHTML = '<b></b>'; f.appendChild(d);
  }
  host.appendChild(f);
  let idx = 0;
  const paint = () => {
    const w = words[idx].padEnd(cells + 1, ' ');
    [...f.children].forEach((dd, i) => {
      const ch = w[i] || ' ', bel = dd.querySelector('b');
      if (bel.textContent !== ch) {
        bel.textContent = ch;
        if (animate) { dd.classList.remove('flip'); void dd.offsetWidth; dd.classList.add('flip'); }
      }
    });
  };
  const set = i => { idx = ((i % words.length) + words.length) % words.length; paint(); onChange(idx, words[idx].trim()); };
  f.addEventListener('click', () => set(idx + 1));
  paint();
  return { el: f, get: () => idx, set, next: () => set(idx + 1) };
};

/* N21 seven-segment countdown — mm:ss in lit segments; the page drives tick();
   click adds a minute */
GW.sevenSeg = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const sv = document.createElement('span'); sv.className = 'seven'; host.appendChild(sv);
  let secs;
  const set = v => {
    secs = ((v % 3600) + 3600) % 3600;
    const mm = String(Math.floor(secs / 60)).padStart(2, '0'), ss = String(secs % 60).padStart(2, '0');
    sv.innerHTML = seg7(mm[0]) + seg7(mm[1]) + '<span class="colon"><i></i><i></i></span>' + seg7(ss[0]) + seg7(ss[1]);
    onChange(secs, mm + ':' + ss);
  };
  sv.addEventListener('click', () => set(secs + 60));
  set(opts.secs !== undefined ? opts.secs : 24 * 60 + 10);
  return { el: sv, get: () => secs, set, tick: () => set(secs - 1) };
};

/* N22 VFD marquee — teal dot-matrix scroll; the page drives tick(); click cycles the message */
GW.vfdMarquee = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const msgs = opts.msgs || ['ARCHSETUP · NET OK · BT 2 · SND 62%', 'WIFI @Hyatt · 300 Mbps · VPN UP', 'BATTERY 84% · DISK 61% · TEMP 47C'];
  const W = opts.width || 176;
  const m = document.createElement('span'); m.className = 'vfdm';
  m.innerHTML = '<span class="txt"></span><span class="mesh"></span>';
  const t = m.querySelector('.txt'); t.textContent = msgs[0];
  host.appendChild(m);
  let mi = 0, x = W;
  m.addEventListener('click', () => {
    mi = (mi + 1) % msgs.length; t.textContent = msgs[mi]; x = W;
    onChange(mi, 'msg ' + (mi + 1) + '/' + msgs.length);
  });
  onChange(0, 'scrolling');
  return {
    el: m, get: () => mi,
    tick: () => { x -= 1.1; if (x < -t.offsetWidth) x = W; t.style.left = x + 'px'; }
  };
};

/* N23 annunciator — named alarm grid with the raise → MSTR CAUTION → ACK → RESET
   lifecycle; TEST proves the bulbs then restores the board */
GW.annunciator = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const CLS = ['acell', 'acell warn', 'acell fault'];
  const NAMES = ['ok', 'warn', 'fault'];
  const cells = opts.cells || [['SYNC', 0], ['LOW BATT', 1], ['LINK', 0], ['NO DNS', 2], ['VPN', 0], ['DISK', 0]];
  const wrap = document.createElement('div'); wrap.className = 'annwrap';
  const grid = document.createElement('div'); grid.className = 'annun'; wrap.appendChild(grid);
  const bar = document.createElement('div'); bar.className = 'annbar';
  const mc = document.createElement('span'); mc.className = 'mc'; mc.textContent = 'MSTR CAUTION'; bar.appendChild(mc);
  ['ACK', 'TEST', 'RESET'].forEach(a => {
    const b = document.createElement('button'); b.className = 'key'; b.dataset.k = a; b.textContent = a; bar.appendChild(b);
  });
  wrap.appendChild(bar); host.appendChild(wrap);
  const els = cells.map(([label, st]) => {
    const c = document.createElement('span'); c.className = CLS[st]; c.textContent = label; grid.appendChild(c); return c;
  });
  let acked = false;
  const active = () => grid.querySelectorAll('.warn,.fault').length;
  const refresh = () => {
    const n = active();
    mc.classList.toggle('on', n > 0); mc.classList.toggle('fl', n > 0 && !acked);
    onChange(n, n === 0 ? 'clear' : n + ' active · ' + (acked ? 'ACK' : 'UNACK'));
  };
  els.forEach((c, i) => c.addEventListener('click', () => {
    let j = CLS.indexOf(c.className.trim()); if (j < 0) j = 0; j = (j + 1) % CLS.length; c.className = CLS[j];
    if (j > 0) acked = false;                 /* a new alarm re-arms the flasher */
    refresh(); onChange(j, cells[i][0] + ' → ' + NAMES[j]);
  }));
  bar.querySelectorAll('.key').forEach(k => k.addEventListener('click', () => {
    const a = k.dataset.k;
    if (a === 'ACK') { if (active() > 0) acked = true; refresh(); }
    else if (a === 'RESET') { els.forEach(c => c.className = 'acell'); acked = false; refresh(); }
    else if (a === 'TEST') {
      const prev = els.map(c => c.className);
      els.forEach(c => c.className = 'acell fault');
      mc.classList.add('on', 'fl'); onChange(null, 'lamp test');
      setTimeout(() => { els.forEach((c, i) => c.className = prev[i]); refresh(); }, 1100);
    }
  }));
  refresh();
  return {
    el: wrap, get: () => els.map(c => Math.max(0, CLS.indexOf(c.className.trim()))),
    set: (i, st) => { els[i].className = CLS[st]; if (st > 0) acked = false; refresh(); }
  };
};

/* N24 jewel pilot lamps — faceted bezel indicators; click cycles red · amber · green · dark */
GW.jewels = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const cols = ['var(--jewel-r)', 'var(--jewel-a)', 'var(--jewel-g)'];
  const NAMES = ['red', 'amber', 'green'];
  const init = opts.states || [0, 1, 2, -1];   /* index into cols; -1 = dark */
  const wrap = document.createElement('span');
  wrap.style.cssText = 'display:inline-flex;gap:10px;align-items:center';
  init.forEach(st => {
    const j = document.createElement('span'); j.className = 'jewel' + (st < 0 ? ' dim' : '');
    if (st >= 0) j.style.setProperty('--jc', cols[st]);
    j.addEventListener('click', () => {
      if (j.classList.contains('dim')) { j.classList.remove('dim'); j.style.setProperty('--jc', cols[0]); onChange(0, 'red'); return; }
      const cur = j.style.getPropertyValue('--jc').trim(); const i = cols.indexOf(cur);
      if (i >= cols.length - 1 || i < 0) { j.classList.add('dim'); onChange(-1, 'dark'); }
      else { j.style.setProperty('--jc', cols[i + 1]); onChange(i + 1, NAMES[i + 1]); }
    });
    wrap.appendChild(j);
  });
  host.appendChild(wrap);
  onChange(null, 'click to cycle');
  return { el: wrap };
};

/* N25 tape counter — odometer wheels; set(total) rolls each wheel to its digit */
GW.tapeCounter = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const wheels = opts.wheels || 6, redFrom = opts.redFrom !== undefined ? opts.redFrom : 4;
  const ct = document.createElement('span'); ct.className = 'counter'; host.appendChild(ct);
  for (let idx = 0; idx < wheels; idx++) {
    const w = document.createElement('span'); w.className = 'cwheel' + (idx >= redFrom ? ' redw' : '');
    const col = document.createElement('span'); col.className = 'col';
    for (let n = -1; n <= 10; n++) { const sp = document.createElement('span'); sp.textContent = ((n + 10) % 10); col.appendChild(sp); }
    w.appendChild(col); ct.appendChild(w);
  }
  const max = Math.pow(10, wheels);
  let v;
  const set = x => {
    v = ((Math.round(x) % max) + max) % max;
    const s = String(v).padStart(wheels, '0');
    [...ct.children].forEach((w, i) => { w.querySelector('.col').style.top = (-(+s[i] + 1) * 34) + 'px'; });
    onChange(v, s);
  };
  set(opts.value !== undefined ? opts.value : 471300);
  return { el: ct, get: () => v, set };
};

/* N26 analog clock — engraved ticks + three hands; the page owns the time source
   and drives set(h, m, s); silent until the first set, like the live original */
GW.analogClock = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const cl = document.createElement('span'); cl.className = 'clock';
  for (let i = 0; i < 12; i++) { const t = document.createElement('span'); t.className = 'tk'; t.style.transform = `rotate(${i * 30}deg)`; cl.appendChild(t); }
  cl.insertAdjacentHTML('beforeend', '<span class="hh"></span><span class="mh"></span><span class="sh"></span><span class="pin"></span>');
  host.appendChild(cl);
  const hh = cl.querySelector('.hh'), mh = cl.querySelector('.mh'), sh = cl.querySelector('.sh');
  const set = (h, m, s) => {
    sh.style.transform = `rotate(${s * 6}deg)`;
    mh.style.transform = `rotate(${m * 6 + s * 0.1}deg)`;
    hh.style.transform = `rotate(${(h % 12) * 30 + m * 0.5}deg)`;
    onChange([h, m, s], String(h).padStart(2, '0') + ':' + String(m).padStart(2, '0') + ':' + String(s).padStart(2, '0'));
  };
  return { el: cl, set };
};

/* N27 frequency-dial scale — printed log axis, marks crowd low and spread high;
   drag the pointer to tune */
GW.freqScale = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const W = opts.width || 184;
  const marks = opts.marks || [0.5, 1, 2, 3, 5, 7, 10, 14, 20];
  const unit = opts.unit || 'MHz';
  const lo = Math.log10(marks[0]), hi = Math.log10(marks[marks.length - 1]);
  const px = m => 6 + ((Math.log10(m) - lo) / (hi - lo)) * (W - 12);
  const fs = document.createElement('span'); fs.className = 'freqscale';
  const band = document.createElement('span'); band.className = 'band'; band.textContent = unit; fs.appendChild(band);
  marks.forEach(m => {
    const tk = document.createElement('span'); tk.className = 'tick'; tk.style.left = px(m) + 'px'; tk.style.height = '11px'; fs.appendChild(tk);
    const mk = document.createElement('span'); mk.className = 'mk'; mk.style.left = px(m) + 'px'; mk.textContent = m; fs.appendChild(mk);
  });
  for (let m = marks[0]; m <= marks[marks.length - 1]; m += (m < 2 ? 0.25 : m < 10 ? 1 : 2)) {
    const tk = document.createElement('span'); tk.className = 'tick'; tk.style.left = px(m) + 'px'; tk.style.height = '6px'; tk.style.opacity = '.5'; fs.appendChild(tk);
  }
  const ptr = document.createElement('span'); ptr.className = 'fptr'; fs.appendChild(ptr);
  host.appendChild(fs);
  let pct;
  const set = p => {
    pct = Math.max(0, Math.min(100, p));
    ptr.style.left = (6 + pct / 100 * (W - 12)) + 'px';
    const f = Math.pow(10, lo + (pct / 100) * (hi - lo));
    onChange(f, (f < 10 ? f.toFixed(1) : Math.round(f)) + ' ' + unit);
  };
  dragX(fs, set);
  set(opts.value !== undefined ? opts.value : 45);
  return { el: fs, get: () => pct, set };
};

/* N28 patch bay — jack grid with SVG cables; click one jack then another to
   patch or unpatch the pair; redraws itself on window resize */
GW.patchBay = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const rows = opts.rows || 2, cols = opts.cols || 4;
  const patch = document.createElement('div'); patch.className = 'patch';
  const jacks = [];
  for (let r = 0; r < rows; r++) {
    const rowEl = document.createElement('div'); rowEl.className = 'row';
    for (let c = 0; c < cols; c++) { const j = document.createElement('span'); j.className = 'jack'; j.dataset.id = (r * cols + c); rowEl.appendChild(j); jacks.push(j); }
    patch.appendChild(rowEl);
  }
  const svg = document.createElementNS(SVGNS, 'svg'); patch.appendChild(svg);
  host.appendChild(patch);
  let conns = (opts.conns || ['0-5', '2-7']).slice(); let pending = null;
  const key = (a, b) => Math.min(a, b) + '-' + Math.max(a, b);
  const draw = () => {
    while (svg.firstChild) svg.removeChild(svg.firstChild);
    const pr = patch.getBoundingClientRect();
    jacks.forEach(j => j.classList.remove('hot'));
    conns.forEach(pair => {
      const [a, b] = pair.split('-').map(Number);
      const ra = jacks[a].getBoundingClientRect(), rb = jacks[b].getBoundingClientRect();
      const x1 = ra.left - pr.left + ra.width / 2, y1 = ra.top - pr.top + ra.height / 2;
      const x2 = rb.left - pr.left + rb.width / 2, y2 = rb.top - pr.top + rb.height / 2;
      const p = document.createElementNS(SVGNS, 'path');
      const my = Math.max(y1, y2) + 16; p.setAttribute('d', `M${x1} ${y1} C${x1} ${my} ${x2} ${my} ${x2} ${y2}`); svg.appendChild(p);
      jacks[a].classList.add('hot'); jacks[b].classList.add('hot');
    });
    onChange(conns.slice(), conns.length ? conns.map(c => { const [a, b] = c.split('-'); return a + '↔' + b; }).join('  ') : 'no cables');
  };
  jacks.forEach(j => {
    j.addEventListener('click', () => {
      const id = +j.dataset.id;
      if (pending == null) { pending = id; j.classList.add('sel'); return; }
      if (pending === id) { pending = null; j.classList.remove('sel'); return; }
      const k = key(pending, id); const i = conns.indexOf(k); if (i >= 0) conns.splice(i, 1); else conns.push(k);
      jacks[pending].classList.remove('sel'); pending = null; draw();
    });
  });
  draw(); window.addEventListener('resize', draw);
  return { el: patch, get: () => conns.slice(), set: c => { conns = c.slice(); draw(); } };
};

/* R10 data matrix readout — a page of labeled amber fields; click cycles pages;
   a page marked live re-renders on the builder's own 1s clock (reduced-motion gated) */
GW.dataMatrix = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const pages = opts.pages || [
    ['SYS', () => ['CPU 42   MEM 61', 'DSK 58   TMP 47C', 'ARCH 6.18 LTS']],
    ['NET', () => ['WIFI @HYATT  300M', 'VPN UP   DNS OK', 'BT 2 PAIRED']],
    ['TIME', () => {
      const d = new Date(), p = n => String(n).padStart(2, '0');
      return [`${d.getFullYear()}-${p(d.getMonth() + 1)}-${p(d.getDate())}`,
        `${p(d.getHours())}:${p(d.getMinutes())}:${p(d.getSeconds())}`,
        'UP 14D 06:12'];
    }, true]];
  const s = stageSvg(host, 'rsvg press', 190, 74);
  def('dmxGlow', d => {
    const fl = svgEl(d, 'filter', { id: 'dmxGlow', x: '-30%', y: '-30%', width: '160%', height: '160%' });
    svgEl(fl, 'feGaussianBlur', { in: 'SourceGraphic', stdDeviation: 1.1 });
  });
  /* the background gradient reads screen-family vars from this widget's subtree,
     so it lives in the local defs, not the shared def sink */
  const bgId = uid('dmxBg');
  const defs = svgEl(s, 'defs', {});
  const bg = svgEl(defs, 'linearGradient', { id: bgId, x1: 0, y1: 0, x2: 0, y2: 1 });
  svgEl(bg, 'stop', { offset: '0', 'stop-color': 'var(--scr-bg1,#140d06)' });
  svgEl(bg, 'stop', { offset: '1', 'stop-color': 'var(--scr-bg2,#0a0705)' });
  svgEl(s, 'rect', { x: 1, y: 1, width: 188, height: 72, rx: 5, fill: `url(#${bgId})`, stroke: '#2c261d' });
  const lines = [];
  for (let r = 0; r < 3; r++) {
    const glow = svgEl(s, 'text', {
      x: 12, y: 24 + r * 18, 'font-size': 9, 'letter-spacing': '.15em',
      'font-family': 'var(--mono)', fill: 'var(--scr-hi,var(--gold-hi))', opacity: .6, filter: 'url(#dmxGlow)'
    });
    const crisp = svgEl(s, 'text', {
      x: 12, y: 24 + r * 18, 'font-size': 9, 'letter-spacing': '.15em',
      'font-family': 'var(--mono)', fill: 'var(--scr-hi,var(--gold-hi))'
    });
    lines.push([glow, crisp]);
  }
  let pi;
  const set = i => {
    pi = ((i % pages.length) + pages.length) % pages.length;
    const [name, rowsFn] = pages[pi];
    rowsFn().forEach((txt, r) => { lines[r][0].textContent = txt; lines[r][1].textContent = txt; });
    onChange(pi, 'page ' + name);
  };
  s.addEventListener('click', () => set(pi + 1));
  set(opts.page || 0);
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches)
    setInterval(() => { if (pages[pi][2]) set(pi); }, 1000);
  return { el: s, get: () => pi, set };
};

/* R11 warning flag window — the striped mechanical flag slides into the window
   when the condition trips; click trips and clears it */
GW.warningFlag = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 120, 64);
  def('barber', d => {
    const pat = svgEl(d, 'pattern', { id: 'barber', width: 10, height: 10, patternUnits: 'userSpaceOnUse', patternTransform: 'rotate(45)' });
    svgEl(pat, 'rect', { x: 0, y: 0, width: 10, height: 10, fill: '#17130c' });
    svgEl(pat, 'rect', { x: 0, y: 0, width: 5, height: 10, fill: 'var(--gold)' });
  });
  const clipId = uid('flagWin');
  const defs = svgEl(s, 'defs', {});
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'rect', { x: 14, y: 20, width: 56, height: 24 });
  svgEl(s, 'rect', { x: 11, y: 17, width: 62, height: 30, rx: 3, fill: '#0a0908', stroke: '#2c261d', 'stroke-width': 2 });
  const g = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  const stripes = svgEl(g, 'rect', { x: 14, y: 20, width: 56, height: 24, fill: 'url(#barber)' });
  stripes.style.transition = 'transform .18s'; stripes.style.transform = 'translateX(-58px)';
  svgEl(s, 'text', {
    x: 92, y: 35, 'text-anchor': 'middle', 'font-size': 7, 'letter-spacing': '.14em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = opts.label || 'VIB';
  let on;
  const set = v => { on = !!v; stripes.style.transform = on ? 'translateX(0)' : 'translateX(-58px)'; onChange(on, on ? 'FLAG' : 'clear'); };
  s.addEventListener('click', () => set(!on));
  set(opts.on || false);
  return { el: s, get: () => on, set };
};

/* R25 fourteen-segment display — the starburst alphanumeric that spells words;
   click cycles the word */
GW.seg14 = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const words = opts.words || ['ZOOM', 'ECHO', 'TAPE', 'MOOD', 'HALL', 'COMP'];
  const MAP = {
    A: ['a', 'b', 'c', 'e', 'f', 'g1', 'g2'], C: ['a', 'd', 'e', 'f'],
    D: ['a', 'b', 'c', 'd', 'i', 'l'], E: ['a', 'd', 'e', 'f', 'g1', 'g2'], H: ['b', 'c', 'e', 'f', 'g1', 'g2'],
    L: ['d', 'e', 'f'], M: ['b', 'c', 'e', 'f', 'h', 'j'], O: ['a', 'b', 'c', 'd', 'e', 'f'],
    P: ['a', 'b', 'e', 'f', 'g1', 'g2'], T: ['a', 'i', 'l'], Z: ['a', 'd', 'j', 'k']
  };
  const s = stageSvg(host, 'rsvg press', 130, 54);
  svgEl(s, 'rect', { x: 1, y: 1, width: 128, height: 52, rx: 5, fill: '#0a0f08', stroke: '#1c2a16', 'stroke-width': 2 });
  /* segment shapes in a 22x36 local box */
  const TH = 2.6, W = 22, H = 36, mid = H / 2;
  const segs = {
    a: [[2, 0], [W - 2, 0], [W - 4, TH], [4, TH]],
    d: [[2, H], [W - 2, H], [W - 4, H - TH], [4, H - TH]],
    f: [[0, 2], [TH, 4], [TH, mid - 2], [0, mid - 1]],
    e: [[0, H - 2], [TH, H - 4], [TH, mid + 2], [0, mid + 1]],
    b: [[W, 2], [W - TH, 4], [W - TH, mid - 2], [W, mid - 1]],
    c: [[W, H - 2], [W - TH, H - 4], [W - TH, mid + 2], [W, mid + 1]],
    g1: [[2, mid], [4, mid - TH / 2], [W / 2 - 1, mid - TH / 2], [W / 2 - 1, mid + TH / 2], [4, mid + TH / 2]],
    g2: [[W - 2, mid], [W - 4, mid - TH / 2], [W / 2 + 1, mid - TH / 2], [W / 2 + 1, mid + TH / 2], [W - 4, mid + TH / 2]],
    i: [[W / 2 - TH / 2, 3], [W / 2 + TH / 2, 3], [W / 2 + TH / 2, mid - 2], [W / 2 - TH / 2, mid - 2]],
    l: [[W / 2 - TH / 2, H - 3], [W / 2 + TH / 2, H - 3], [W / 2 + TH / 2, mid + 2], [W / 2 - TH / 2, mid + 2]],
    h: [[3, 3], [5.5, 3], [W / 2 - 2, mid - 3], [W / 2 - 4.5, mid - 3]],
    j: [[W - 3, 3], [W - 5.5, 3], [W / 2 + 2, mid - 3], [W / 2 + 4.5, mid - 3]],
    k: [[3, H - 3], [5.5, H - 3], [W / 2 - 2, mid + 3], [W / 2 - 4.5, mid + 3]],
    m: [[W - 3, H - 3], [W - 5.5, H - 3], [W / 2 + 2, mid + 3], [W / 2 + 4.5, mid + 3]]
  };
  const cells = [];
  for (let d = 0; d < 4; d++) {
    const x0 = 13 + d * 28, y0 = 9, cell = {};
    for (const k in segs) {
      cell[k] = svgEl(s, 'polygon', { points: segs[k].map(p => `${x0 + p[0]},${y0 + p[1]}`).join(' '), fill: 'var(--sevoff)' });
    }
    cells.push(cell);
  }
  let wi;
  const set = i => {
    wi = ((i % words.length) + words.length) % words.length;
    const word = words[wi].padEnd(4, ' ');
    cells.forEach((cell, d) => {
      const lit = MAP[word[d]] || [];
      for (const k in cell) {
        const on = lit.includes(k);
        cell[k].setAttribute('fill', on ? 'var(--sevgrn)' : 'var(--sevoff)');
        cell[k].setAttribute('style', on ? 'filter:drop-shadow(0 0 2.5px rgba(87,211,87,.6))' : '');
      }
    });
    onChange(wi, words[wi]);
  };
  s.addEventListener('click', () => set(wi + 1));
  set(opts.index || 0);
  return { el: s, get: () => wi, set };
};

/* R26 response graph — log-frequency axes with a draggable amber peak; 2D drag
   places the peak in both axes at once */
GW.responseGraph = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg', 190, 110);
  const RG = { x0: 30, x1: 182, y0: 8, y1: 86, fLo: Math.log10(32), fHi: Math.log10(16000), db: 12 };
  def('avGlow', d => {
    const fl = svgEl(d, 'filter', { id: 'avGlow', x: '-60%', y: '-60%', width: '220%', height: '220%' });
    svgEl(fl, 'feGaussianBlur', { in: 'SourceGraphic', stdDeviation: 1.4 });
  });
  svgEl(s, 'rect', { x: 1, y: 1, width: 188, height: 108, rx: 5, fill: '#0d1410', stroke: '#22301f', 'stroke-width': 2 });
  const FREQS = [32, 64, 128, 250, 500, 1000, 2000, 4000, 8000, 16000];
  const xOf = f => RG.x0 + (Math.log10(f) - RG.fLo) / (RG.fHi - RG.fLo) * (RG.x1 - RG.x0);
  const yOf = db => RG.y0 + (RG.db - db) / (2 * RG.db) * (RG.y1 - RG.y0);
  FREQS.forEach(f => {
    const x = xOf(f);
    svgEl(s, 'line', { x1: x, y1: RG.y0, x2: x, y2: RG.y1, stroke: '#22301f', 'stroke-width': .6 });
    svgEl(s, 'text', {
      x, y: RG.y1 + 9, 'text-anchor': 'middle', 'font-size': 4.8, 'font-family': 'var(--mono)',
      fill: 'var(--steel)'
    }).textContent = f < 1000 ? f : (f / 1000) + 'k';
  });
  for (const db of [12, 6, 0, -6, -12]) {
    const y = yOf(db);
    svgEl(s, 'line', { x1: RG.x0, y1: y, x2: RG.x1, y2: y, stroke: '#22301f', 'stroke-width': db === 0 ? 1 : .6 });
    svgEl(s, 'text', {
      x: RG.x0 - 4, y: y + 2, 'text-anchor': 'end', 'font-size': 4.8, 'font-family': 'var(--mono)',
      fill: 'var(--steel)'
    }).textContent = (db > 0 ? '+' : '') + db;
  }
  const glowLine = svgEl(s, 'polyline', { points: '', fill: 'none', stroke: 'var(--gold-hi)', 'stroke-width': 3, opacity: .35, filter: 'url(#avGlow)' });
  const curve = svgEl(s, 'polyline', { points: '', fill: 'none', stroke: 'var(--gold)', 'stroke-width': 1.6 });
  const handle = svgEl(s, 'circle', { r: 4, fill: 'var(--gold-hi)', stroke: '#7d5c16', 'stroke-width': 1 });
  handle.style.cursor = 'move';
  let fc, gain;
  const set = (f, g) => {
    fc = Math.max(32, Math.min(16000, f)); gain = Math.max(-12, Math.min(12, g));
    const sigma = 0.28; let pts = '';
    for (let i = 0; i <= 76; i++) {
      const lf = RG.fLo + i / 76 * (RG.fHi - RG.fLo);
      const db = gain * Math.exp(-Math.pow(lf - Math.log10(fc), 2) / (2 * sigma * sigma));
      pts += `${xOf(Math.pow(10, lf)).toFixed(1)},${yOf(db).toFixed(1)} `;
    }
    curve.setAttribute('points', pts.trim()); glowLine.setAttribute('points', pts.trim());
    handle.setAttribute('cx', xOf(fc)); handle.setAttribute('cy', yOf(gain));
    const fLbl = fc < 1000 ? Math.round(fc) + ' Hz' : (fc / 1000).toFixed(1) + ' kHz';
    onChange([fc, gain], `${fLbl} · ${gain >= 0 ? '+' : ''}${gain.toFixed(1)} dB`);
  };
  /* 2D drag: the plot places the peak in both axes at once */
  s.style.touchAction = 'none';
  s.addEventListener('pointerdown', e => {
    s.setPointerCapture(e.pointerId);
    const move = ev => {
      const r = s.getBoundingClientRect(), sx = 190 / r.width, sy = 110 / r.height;
      const px = (ev.clientX - r.left) * sx, py = (ev.clientY - r.top) * sy;
      const lf = RG.fLo + Math.max(0, Math.min(1, (px - RG.x0) / (RG.x1 - RG.x0))) * (RG.fHi - RG.fLo);
      const g = RG.db - Math.max(0, Math.min(1, (py - RG.y0) / (RG.y1 - RG.y0))) * 2 * RG.db;
      set(Math.pow(10, lf), g);
    };
    move(e);
    const up = () => { s.removeEventListener('pointermove', move); s.removeEventListener('pointerup', up); s.removeEventListener('pointercancel', up); };
    s.addEventListener('pointermove', move); s.addEventListener('pointerup', up); s.addEventListener('pointercancel', up);
    e.preventDefault();
  });
  set(opts.fc !== undefined ? opts.fc : 1200, opts.gain !== undefined ? opts.gain : 6.5);
  return { el: s, get: () => [fc, gain], set };
};

/* R30 telegraph indicator — the pointer names the active state on labeled
   sectors, engine-telegraph style; click steps the state */
GW.telegraphIndicator = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const states = opts.states || ['OK', 'TEST', 'BUSY', 'STOP', 'ATTN', 'FAULT'];
  const s = stageSvg(host, 'rsvg press', 110, 110), cx = 55, cy = 55, N = states.length;
  svgEl(s, 'circle', { cx, cy, r: 50, fill: '#171412', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 43, fill: 'var(--cream)', stroke: '#b7b29a', 'stroke-width': 1 });
  states.forEach((st, i) => {
    const a = i * 360 / N - 90 + 180 / N;
    const [lx1, ly1] = polar(cx, cy, 9, i * 360 / N), [lx2, ly2] = polar(cx, cy, 43, i * 360 / N);
    svgEl(s, 'line', { x1: lx1, y1: ly1, x2: lx2, y2: ly2, stroke: '#2b2418', 'stroke-width': 1 });
    const g = svgEl(s, 'g', { transform: `rotate(${a + 90},${cx},${cy})` });
    svgEl(g, 'text', {
      x: cx, y: cy - 28, 'text-anchor': 'middle', 'font-size': 7, 'font-weight': 700,
      'font-family': 'var(--mono)', fill: '#2b2418'
    }).textContent = st;
  });
  const ptr = svgEl(s, 'g', {}); ptr.style.transition = 'transform .18s'; ptr.style.transformOrigin = `${cx}px ${cy}px`;
  svgEl(ptr, 'polygon', { points: `${cx - 2.5},${cy} ${cx},${cy - 38} ${cx + 2.5},${cy}`, fill: 'var(--fail)', stroke: '#7a2a1a', 'stroke-width': .5 });
  svgEl(ptr, 'rect', { x: cx + 1, y: cy - 16, width: 10, height: 7, rx: 1, fill: 'var(--gold)', stroke: '#7d5c16', 'stroke-width': .6 });
  svgEl(s, 'circle', { cx, cy, r: 8, fill: '#171412', stroke: '#000' });
  let si;
  const set = i => {
    si = ((i % N) + N) % N;
    ptr.style.transform = `rotate(${si * 360 / N + 180 / N}deg)`;
    onChange(si, states[si]);
  };
  s.addEventListener('click', () => set(si + 1));
  set(opts.index || 0);
  return { el: s, get: () => si, set };
};

/* R31 radar sweep — the beam circles the bearing ring on the builder's own
   clock (reduced-motion gated), contacts bloom as it passes; click marks the bearing */
GW.radarSweep = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const contacts = opts.contacts || [[60, .55], [205, .7], [318, .4]];
  const s = stageSvg(host, 'rsvg press', 130, 130), cx = 65, cy = 65;
  const clipId = uid('radarClip');
  const defs = svgEl(s, 'defs', {});
  const clip = svgEl(defs, 'clipPath', { id: clipId });
  svgEl(clip, 'circle', { cx, cy, r: 46 });
  svgEl(s, 'circle', { cx, cy, r: 62, fill: '#1a1714', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 52, fill: 'var(--scr-bg1,#120b05)', stroke: 'var(--scr-brd,#3a2a12)', 'stroke-width': 1 });
  for (let d = 0; d < 360; d += 30) {
    const [x1, y1] = polar(cx, cy, 51, d), [x2, y2] = polar(cx, cy, 47, d);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--scr-ink,var(--gold))', 'stroke-width': 1, opacity: .8 });
    const g = svgEl(s, 'g', { transform: `rotate(${d},${cx},${cy})` });
    svgEl(g, 'text', {
      x: cx, y: cy - 47.5, 'text-anchor': 'middle', 'font-size': 4.6, 'font-family': 'var(--mono)',
      fill: 'var(--scr-ink,var(--gold))', opacity: .9
    }).textContent = String(d).padStart(3, '0');
  }
  for (let d = 0; d < 360; d += 10) {
    if (d % 30 === 0) continue;
    const [x1, y1] = polar(cx, cy, 51, d), [x2, y2] = polar(cx, cy, 49, d);
    svgEl(s, 'line', { x1, y1, x2, y2, stroke: 'var(--scr-ink,var(--gold))', 'stroke-width': .6, opacity: .5 });
  }
  const g = svgEl(s, 'g', { 'clip-path': `url(#${clipId})` });
  svgEl(g, 'circle', { cx, cy, r: 46, fill: 'var(--scr-bg2,#0d0803)' });
  for (const r of [15, 30, 45])
    svgEl(g, 'circle', { cx, cy, r, fill: 'none', stroke: 'var(--scr-ink,var(--gold))', 'stroke-opacity': .18, 'stroke-width': .7 });
  const sweep = svgEl(g, 'g', {});
  for (let t = 0; t < 5; t++) {
    const a0 = -14 + t * 2.8, a1 = a0 + 2.8;
    const [x1, y1] = polar(cx, cy, 46, a0), [x2, y2] = polar(cx, cy, 46, a1);
    svgEl(sweep, 'path', {
      d: `M ${cx} ${cy} L ${x1} ${y1} A 46 46 0 0 1 ${x2} ${y2} Z`,
      fill: 'var(--scr-ink,var(--gold))', 'fill-opacity': (0.04 + t * 0.045).toFixed(3)
    });
  }
  svgEl(sweep, 'line', {
    x1: cx, y1: cy, x2: cx, y2: cy - 46, stroke: 'var(--scr-hi,var(--gold-hi))', 'stroke-width': 1.4,
    transform: `rotate(0,${cx},${cy})`, opacity: .95
  });
  const blips = contacts.map(([bd, rf]) => {
    const [x, y] = polar(cx, cy, 46 * rf, bd);
    return svgEl(g, 'circle', { cx: x, cy: y, r: 2.2, fill: 'var(--scr-hi,var(--gold-hi))', opacity: 0 });
  });
  svgEl(s, 'circle', { cx, cy, r: 3, fill: 'var(--scr-ink,var(--gold))', opacity: .8 });
  const mark = svgEl(s, 'text', {
    x: cx, y: 124, 'text-anchor': 'middle', 'font-size': 6, 'letter-spacing': '.12em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  });
  mark.textContent = 'BEARING —';
  let a = opts.bearing !== undefined ? opts.bearing : 210;
  const tick = () => {
    a = (a + 2.6) % 360;
    sweep.setAttribute('transform', `rotate(${a},${cx},${cy})`);
    contacts.forEach(([bd], i) => {
      const d = (a - bd + 360) % 360;                 /* degrees since beam passed */
      blips[i].setAttribute('opacity', d < 200 ? Math.max(0, .95 - d / 200) : 0);
    });
    mark.textContent = mark.textContent.startsWith('MARK') ? mark.textContent :
      'BEARING ' + String(Math.round(a) % 360).padStart(3, '0');
  };
  s.addEventListener('click', () => {
    const b = String(Math.round(a) % 360).padStart(3, '0');
    mark.textContent = 'MARK ' + b;
    onChange(a, 'mark ' + b);
  });
  tick(); onChange(a, 'sweeping');
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches) setInterval(tick, 50);
  return { el: s, get: () => a, tick };
};

/* R35 day-date disc calendar — coaxial printed discs rotate so today reads
   under the fixed hand; starts on today; click rolls midnight forward */
GW.dayDateCal = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const DAYS = ['SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'];
  const s = stageSvg(host, 'rsvg press', 130, 130), cx = 65, cy = 65, HAND = 135;
  gradDef('ddFace', 'radialGradient', { cx: '46%', cy: '40%', r: '75%' }, [['0', '#efe9da'], ['1', '#cfc8b6']]);
  /* movement plate + white calendar disc */
  svgEl(s, 'circle', { cx, cy, r: 62, fill: '#17140f', stroke: '#060505', 'stroke-width': 2 });
  for (let k = 0; k < 5; k++) {
    const [x, y] = polar(cx, cy, 58, 20 + k * 72);
    svgEl(s, 'circle', { cx: x, cy: y, r: 1.8, fill: '#060505' });
  }
  svgEl(s, 'circle', { cx, cy, r: 54, fill: 'url(#ddFace)', stroke: '#8f897b', 'stroke-width': .8 });
  /* date ring: 31 radial numerals on its own group */
  const dateG = svgEl(s, 'g', {});
  for (let d = 1; d <= 31; d++) {
    const a = (d - 1) * (360 / 31);
    const g = svgEl(dateG, 'g', { transform: `rotate(${a},${cx},${cy})` });
    svgEl(g, 'text', {
      x: cx, y: cy - 46, 'text-anchor': 'middle', 'font-size': 7.5, 'font-weight': 700,
      'font-family': 'var(--mono)', fill: '#14110e'
    }).textContent = String(d);
  }
  /* inner weekday disc: 7 names twice around, separated by a hairline ring */
  svgEl(s, 'circle', { cx, cy, r: 38, fill: 'none', stroke: '#8f897b', 'stroke-width': .7 });
  const dayG = svgEl(s, 'g', {});
  for (let i = 0; i < 14; i++) {
    const a = i * (360 / 14);
    const g = svgEl(dayG, 'g', { transform: `rotate(${a},${cx},${cy})` });
    svgEl(g, 'text', {
      x: cx, y: cy - 28, 'text-anchor': 'middle', 'font-size': 6.8, 'font-weight': 700,
      'font-family': 'var(--mono)', fill: '#14110e'
    }).textContent = DAYS[i % 7];
  }
  /* fixed yellow hand from hub toward the read index, and the hub */
  const [hx, hy] = polar(cx, cy, 44, HAND);
  svgEl(s, 'line', { x1: cx, y1: cy, x2: hx, y2: hy, stroke: '#e8cf4a', 'stroke-width': 3, 'stroke-linecap': 'round' });
  svgEl(s, 'line', { x1: cx, y1: cy, x2: hx, y2: hy, stroke: 'rgba(0,0,0,.25)', 'stroke-width': .8 });
  svgEl(s, 'circle', { cx, cy, r: 6, fill: '#b8b2a4', stroke: '#5c574c', 'stroke-width': 1.2 });
  svgEl(s, 'circle', { cx, cy, r: 2.4, fill: '#7a7466' });
  s.style.cursor = 'pointer';
  let date, day;
  const set = (d, w) => {
    date = d; day = w;
    dateG.setAttribute('transform', `rotate(${(HAND - (d - 1) * (360 / 31)).toFixed(2)},${cx},${cy})`);
    dayG.setAttribute('transform', `rotate(${(HAND - w * (360 / 14)).toFixed(2)},${cx},${cy})`);
    onChange([d, w], DAYS[w] + ' ' + d);
  };
  s.addEventListener('click', () => set(date % 31 + 1, (day + 1) % 7));
  const now = new Date();
  set(opts.date !== undefined ? opts.date : now.getDate(),
    opts.day !== undefined ? opts.day : now.getDay());
  return { el: s, get: () => [date, day], set };
};

/* R36 LED dot matrix — 8x8 paintable bitmap behind a tinted window; click dots
   to paint; starts on the reference K */
GW.dotMatrix = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const N = 8, STEP = 11, X0 = 10.5, Y0 = 10.5;
  const glyph = opts.glyph || ['10000100', '10001000', '10010000', '11100000', '10100000', '10010000', '10001000', '10000100'];
  const s = stageSvg(host, 'rsvg press', 108, 108);
  svgEl(s, 'rect', { x: 2, y: 2, width: 104, height: 104, rx: 8, fill: '#17140f', stroke: '#060505', 'stroke-width': 1.5 });
  svgEl(s, 'rect', { x: 6, y: 6, width: 96, height: 96, rx: 5, fill: '#0d0505', stroke: '#241010', 'stroke-width': 1 });
  let lit = 0;
  const paint = (d, on) => {
    d.on = on;
    d.el.setAttribute('fill', on ? '#ff4a30' : '#2a1210');
    d.el.setAttribute('filter', on ? 'drop-shadow(0 0 3.5px rgba(255,74,48,.85))' : 'none');
  };
  for (let r = 0; r < N; r++) for (let c = 0; c < N; c++) {
    const el = svgEl(s, 'circle', { cx: X0 + c * STEP + STEP / 2, cy: Y0 + r * STEP + STEP / 2, r: 4.1, fill: '#2a1210' });
    el.style.cursor = 'pointer';
    const d = { el, on: false };
    paint(d, glyph[r][c] === '1'); if (d.on) lit++;
    el.addEventListener('click', () => {
      paint(d, !d.on); lit += d.on ? 1 : -1;
      onChange(lit, lit + ' / 64 lit');
    });
  }
  onChange(lit, lit + ' / 64 lit');
  return { el: s, get: () => lit };
};

/* R45 flip-disc tile array — bistable mechanical pixels; scaleX flip with the
   color swap at the midpoint; click a disc to flip it */
GW.flipDisc = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const COLS = 7, ROWS = 5, STEP = 14, X0 = 13, Y0 = 13;
  const glyph = opts.glyph || ['0000100', '0000010', '1111111', '0000010', '0000100'];   /* arrow right */
  const s = stageSvg(host, 'rsvg press', 120, 92);
  svgEl(s, 'rect', { x: 2, y: 2, width: 116, height: 88, rx: 7, fill: '#17140f', stroke: '#060505', 'stroke-width': 1.5 });
  let lit = 0;
  for (let r = 0; r < ROWS; r++) for (let c = 0; c < COLS; c++) {
    const el = svgEl(s, 'circle', { cx: X0 + c * STEP + STEP / 2 - 2, cy: Y0 + r * STEP + STEP / 2 - 2, r: 5.6, stroke: '#060505', 'stroke-width': .8 });
    el.style.transformBox = 'fill-box'; el.style.transformOrigin = 'center'; el.style.transition = 'transform .11s ease-in';
    el.style.cursor = 'pointer';
    const d = { el, on: glyph[r][c] === '1' };
    el.setAttribute('fill', d.on ? '#e3d44f' : '#141210'); if (d.on) lit++;
    el.addEventListener('click', () => {
      d.on = !d.on; lit += d.on ? 1 : -1;
      if (matchMedia('(prefers-reduced-motion: reduce)').matches) { el.setAttribute('fill', d.on ? '#e3d44f' : '#141210'); }
      else {
        el.style.transform = 'scaleX(0)';
        setTimeout(() => { el.setAttribute('fill', d.on ? '#e3d44f' : '#141210'); el.style.transform = 'scaleX(1)'; }, 115);
      }
      onChange(lit, lit + ' discs showing');
    });
  }
  onChange(lit, lit + ' discs showing');
  return { el: s, get: () => lit };
};

/* R46 dekatron counting ring — each click pulses the neon glow one cathode
   around; the wrap flashes the carry dot */
GW.dekatron = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 120, 120), cx = 60, cy = 60;
  svgEl(s, 'circle', { cx, cy, r: 52, fill: '#171310', stroke: '#060505', 'stroke-width': 2 });
  svgEl(s, 'circle', { cx, cy, r: 46, fill: '#0d0a08', stroke: '#2a221c', 'stroke-width': 1 });
  svgEl(s, 'ellipse', { cx: cx - 14, cy: cy - 18, rx: 20, ry: 11, fill: 'rgba(255,255,255,.05)', transform: `rotate(-24,${cx - 14},${cy - 18})` });
  const dots = [];
  for (let i = 0; i < 10; i++) {
    const [x, y] = polar(cx, cy, 34, i * 36);
    svgEl(s, 'text', {
      x: polar(cx, cy, 43, i * 36)[0], y: polar(cx, cy, 43, i * 36)[1] + 2, 'text-anchor': 'middle', 'font-size': 5.2,
      'font-family': 'var(--mono)', fill: 'var(--steel)'
    }).textContent = String(i);
    dots.push(svgEl(s, 'circle', { cx: x, cy: y, r: 3.4, fill: '#3a2a20' }));
  }
  const carry = svgEl(s, 'circle', { cx, cy: cy - 6, r: 3, fill: '#2a1c14' });
  svgEl(s, 'text', {
    x: cx, y: cy + 8, 'text-anchor': 'middle', 'font-size': 4.6, 'letter-spacing': '.12em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'CARRY';
  let pos = opts.count || 0, carries = 0;
  const draw = () => {
    dots.forEach((d, i) => {
      const on = i === pos;
      d.setAttribute('fill', on ? '#ff9a4c' : '#3a2a20');
      d.setAttribute('filter', on ? 'drop-shadow(0 0 5px rgba(255,154,76,.9))' : 'none');
    });
    onChange(pos, 'COUNT ' + pos + (carries ? ' · CARRY x' + carries : ''));
  };
  s.style.cursor = 'pointer';
  s.addEventListener('click', () => {
    pos = (pos + 1) % 10;
    if (pos === 0) {
      carries++; carry.setAttribute('fill', '#ff9a4c');
      carry.setAttribute('filter', 'drop-shadow(0 0 4px rgba(255,154,76,.9))');
      setTimeout(() => { carry.setAttribute('fill', '#2a1c14'); carry.removeAttribute('filter'); }, 220);
    }
    draw();
  });
  draw();
  return { el: s, get: () => pos };
};

/* R47 landing gear indicator — three greens or nothing; the lever cycles
   down → transit (amber pulse) → up */
GW.gearIndicator = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 140, 110);
  svgEl(s, 'rect', { x: 2, y: 2, width: 136, height: 106, rx: 9, fill: '#1c1916', stroke: '#060505', 'stroke-width': 1.5 });
  const POS = [['NOSE', 48, 28], ['L', 24, 74], ['R', 72, 74]];
  const lamps = {};
  POS.forEach(([n, x, y]) => {
    svgEl(s, 'circle', { cx: x, cy: y, r: 9, fill: '#0d0b09', stroke: '#2c2820', 'stroke-width': 1.5 });
    lamps[n] = svgEl(s, 'circle', { cx: x, cy: y, r: 6.2, fill: '#16240f' });
    svgEl(s, 'text', {
      x, y: y + 18, 'text-anchor': 'middle', 'font-size': 5.2, 'letter-spacing': '.08em',
      'font-family': 'var(--mono)', fill: 'var(--steel)'
    }).textContent = n;
  });
  /* gear lever: slot + wheel-shaped knob */
  svgEl(s, 'rect', { x: 106, y: 22, width: 8, height: 66, rx: 4, fill: '#0d0b09', stroke: '#2c2820', 'stroke-width': 1 });
  const lever = svgEl(s, 'g', {});
  svgEl(lever, 'rect', { x: 107.5, y: 36, width: 5, height: 26, fill: '#8f8a7e' });
  svgEl(lever, 'circle', { cx: 110, cy: 32, r: 8, fill: '#26221c', stroke: '#4a463e', 'stroke-width': 2.4 });
  svgEl(lever, 'circle', { cx: 110, cy: 32, r: 3, fill: '#4a463e' });
  svgEl(s, 'text', {
    x: 110, y: 100, 'text-anchor': 'middle', 'font-size': 5.2, 'letter-spacing': '.08em',
    'font-family': 'var(--mono)', fill: 'var(--steel)'
  }).textContent = 'GEAR';
  let state = opts.state || 'down', busy = false;
  const paint = () => {
    const c = state === 'down' ? 'var(--pass)' : state === 'transit' ? 'var(--amber-warn)' : '#16240f';
    for (const n of Object.keys(lamps)) {
      lamps[n].setAttribute('fill', c);
      lamps[n].setAttribute('filter', state === 'down' ? 'drop-shadow(0 0 4px rgba(116,147,47,.8))' :
        state === 'transit' ? 'drop-shadow(0 0 4px rgba(var(--glow-lo),.7))' : 'none');
      lamps[n].style.animation = state === 'transit' ? 'pulse var(--pulse-rate) ease-in-out infinite' : 'none';
    }
    lever.setAttribute('transform', state === 'up' ? 'translate(0,-8)' : state === 'transit' ? 'translate(0,-4)' : '');
    onChange(state, state === 'down' ? 'GEAR DOWN · 3 GREEN' : state === 'up' ? 'GEAR UP' : 'IN TRANSIT');
  };
  s.style.cursor = 'pointer';
  s.addEventListener('click', () => {
    if (busy) return;
    const target = state === 'down' ? 'up' : 'down';
    if (matchMedia('(prefers-reduced-motion: reduce)').matches) { state = target; paint(); return; }
    busy = true; state = 'transit'; paint();
    setTimeout(() => { state = target; busy = false; paint(); }, 1500);
  });
  paint();
  return { el: s, get: () => state };
};

/* R52 blinkenlights front panel — address/data lamps ripple with a live
   pseudo-PC (builder-owned clock, reduced-motion gated) that folds in the
   switch register; flip the SR bits and the pattern changes */
GW.blinkenlights = function (host, opts = {}) {
  const onChange = opts.onChange || noop;
  const s = stageSvg(host, 'rsvg press', 170, 100);
  svgEl(s, 'rect', { x: 2, y: 2, width: 166, height: 96, rx: 8, fill: '#3a1420', stroke: '#060505', 'stroke-width': 1.5 });
  svgEl(s, 'rect', { x: 8, y: 8, width: 154, height: 62, rx: 5, fill: '#14090e' });
  const mkRow = (y, lbl) => {
    const row = [];
    svgEl(s, 'text', {
      x: 12, y: y + 2.6, 'font-size': 4.6, 'letter-spacing': '.08em', 'font-family': 'var(--mono)',
      fill: '#b08a96'
    }).textContent = lbl;
    for (let i = 0; i < 12; i++) row.push(svgEl(s, 'circle', { cx: 46 + i * 10, cy: y, r: 3, fill: '#2a1210' }));
    return row;
  };
  const addr = mkRow(24, 'ADDR'), data = mkRow(46, 'DATA');
  const paint = (row, val) => row.forEach((d, i) => {
    const on = (val >> (11 - i)) & 1;
    d.setAttribute('fill', on ? '#ffb43a' : '#2a1210');
    d.setAttribute('filter', on ? 'drop-shadow(0 0 3px rgba(255,180,58,.8))' : 'none');
  });
  /* switch register: 8 mini toggles */
  let sr = opts.sr !== undefined ? opts.sr : 0b10100101;
  const toggles = [];
  for (let i = 0; i < 8; i++) {
    const x = 46 + i * 14;
    svgEl(s, 'rect', { x: x - 3, y: 76, width: 6, height: 16, rx: 3, fill: '#0d0b09', stroke: '#4a2432', 'stroke-width': 1 });
    const t = svgEl(s, 'circle', { cx: x, cy: 80, r: 4, fill: '#8f8a7e', stroke: '#3c382f', 'stroke-width': 1 });
    t.style.cursor = 'pointer';
    const hit = svgEl(s, 'rect', { x: x - 7, y: 72, width: 14, height: 24, fill: 'transparent' });
    hit.style.cursor = 'pointer';
    hit.addEventListener('click', () => { sr ^= (1 << (7 - i)); draw(); });
    toggles.push(t);
  }
  svgEl(s, 'text', {
    x: 12, y: 83, 'font-size': 4.6, 'letter-spacing': '.08em', 'font-family': 'var(--mono)',
    fill: '#b08a96'
  }).textContent = 'SR';
  let pc = 0o1234;
  const draw = () => {
    toggles.forEach((t, i) => t.setAttribute('cy', ((sr >> (7 - i)) & 1) ? 76 : 84));
    onChange(sr, 'SR ' + sr.toString(8).padStart(3, '0') + ' (octal)');
  };
  const tick = () => { pc = ((pc * 5 + sr + 1) & 0xFFF); paint(addr, pc); paint(data, (pc ^ (pc << 3) ^ sr) & 0xFFF); };
  draw(); tick();
  if (!matchMedia('(prefers-reduced-motion: reduce)').matches) setInterval(tick, 250);
  return { el: s, get: () => sr, tick };
};

/* ---- widget CSS: injected once, grows as builders move in ---- */
/* widget-internal CSS (moved from the gallery <style> block; gallery keeps page furniture) */
const GW_CSS = `
/* ---- shared primitives ---- */
.lamp{width:9px;height:9px;border-radius:50%;background:var(--pass);box-shadow:0 0 6px 1px rgba(116,147,47,.55)}
.lamp.gold{background:var(--gold);box-shadow:0 0 6px 1px rgba(var(--glow-lo),.6)}
.lamp.red{background:var(--fail);box-shadow:0 0 6px 1px rgba(203,107,77,.55)}
.lamp.off{background:var(--wash);box-shadow:none}
.lamp.busy{background:var(--gold);animation:pulse var(--pulse-rate) ease-in-out infinite}
/* standard pulse: 1s ease-in-out — the norm for every pulsing / flashing element */
@keyframes pulse{50%{opacity:.25}}

/* slide toggle — after the iPod-hold-switch pill: dome thumb, revealed state engraving.
   Flex layout with fixed px only: absolute insets and stretched widths misrender under stage zoom. */
.switch{display:inline-flex;vertical-align:middle;align-items:center;justify-content:space-between;
  width:52px;height:23px;border-radius:12px;padding:2px 7px 2px 2px;cursor:pointer;
  background:var(--sw-off-bg,linear-gradient(180deg,#15130f,#242019));
  border:1px solid var(--sw-off-brd,var(--slate));
  box-shadow:inset 0 1.5px 3px rgba(0,0,0,.55)}
.switch::before{content:"OFF";order:2;font-size:7px;letter-spacing:.06em;font-weight:700;
  font-family:var(--mono);color:var(--sw-off-ink,var(--cream))}
.switch::after{content:"";order:1;width:17px;height:17px;border-radius:50%;
  background:var(--sw-thumb,radial-gradient(circle at 35% 28%,#f6f2e8,#b0aa9a));
  box-shadow:0 1px 2.5px rgba(0,0,0,.65),inset 0 1px 0 rgba(255,255,255,.25)}
.switch.on{background:var(--sw-on-bg,linear-gradient(180deg,var(--amber-grad-top),var(--gold)));
  border-color:var(--sw-on-brd,var(--gold-hi));
  padding:2px 2px 2px 7px;box-shadow:inset 0 1.5px 3px rgba(0,0,0,.3)}
.switch.on::before{content:"ON";order:1;color:var(--sw-on-ink,var(--panel))}
.switch.on::after{order:2}
.switch.red{background:linear-gradient(180deg,#d98a6f,var(--fail));border-color:var(--fail);padding:2px 2px 2px 7px}
.switch.red::before{content:"OFF";order:1;color:var(--cream)}
.switch.red::after{order:2}

.key{font:inherit;font-size:11.5px;letter-spacing:.06em;color:var(--silver);cursor:pointer;
  background:linear-gradient(180deg,#23211e,#191715);border:1px solid #33302b;border-bottom-color:#0c0b0a;
  border-radius:8px;padding:8px 12px;box-shadow:inset 0 1px 0 rgba(255,255,255,.04),0 2px 3px rgba(0,0,0,.4)}
.key:hover{color:var(--gold);border-color:var(--gold)}
.key:active{transform:translateY(1px)}
.key.on{color:var(--panel);background:linear-gradient(180deg,var(--amber-grad-top),var(--gold));border-color:var(--gold-hi);font-weight:700}
.key.green{color:var(--cream);background:linear-gradient(180deg,#9cbf5e,var(--pass));border-color:var(--pass);font-weight:700}
.key.red{color:var(--cream);background:linear-gradient(180deg,#d98a6f,var(--fail));border-color:var(--fail)}
.key.off{opacity:.4}

.chip{color:var(--dim);cursor:pointer;border-bottom:1px dotted var(--wash);font-size:12px}
.chip.on{color:var(--gold);border-color:var(--gold)}

.badge{font-size:.62rem;letter-spacing:.18em;color:var(--panel);background:var(--gold);border-radius:4px;padding:1px 6px}
.badge.red{background:var(--fail);color:var(--cream)}
.badge.ghost{background:transparent;border:1px solid var(--slate);color:var(--silver)}

/* fader */
.fader{width:150px;height:16px;position:relative;cursor:pointer;touch-action:none}
.fader .slot{position:absolute;top:6px;left:0;right:0;height:4px;border-radius:2px;background:#0d0f10;border:1px solid #231f18;overflow:hidden}
.fader .fill{position:absolute;top:0;left:0;bottom:0;background:linear-gradient(90deg,var(--amber-grad-bot),var(--gold))}
.fader .cap{position:absolute;top:1px;width:7px;height:14px;border-radius:2px;margin-left:-3.5px;
  background:linear-gradient(180deg,var(--amber-grad-top),var(--amber-grad-mid));border:1px solid var(--amber-edge);box-shadow:0 1px 2px rgba(0,0,0,.5)}
/* vertical fader */
.vfader{width:16px;height:64px;position:relative;cursor:pointer;touch-action:none}
.vfader .slot{position:absolute;left:6px;top:0;bottom:0;width:4px;border-radius:2px;background:#0d0f10;border:1px solid #231f18;overflow:hidden}
.vfader .fill{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(0deg,var(--amber-grad-bot),var(--gold))}
.vfader .cap{position:absolute;left:1px;height:7px;width:14px;border-radius:2px;margin-top:-3.5px;
  background:linear-gradient(90deg,var(--amber-grad-mid),var(--amber-grad-top));border:1px solid var(--amber-edge)}

/* rotary knob */
.knob{width:52px;height:52px;border-radius:50%;position:relative;cursor:ns-resize;touch-action:none;
  background:radial-gradient(circle at 40% 35%,#2a2622,#141210);border:1px solid #3a352c;
  box-shadow:inset 0 2px 3px rgba(255,255,255,.05),0 3px 6px rgba(0,0,0,.5)}
.knob .ind{position:absolute;left:50%;top:5px;width:2px;height:16px;background:var(--gold-hi);
  margin-left:-1px;transform-origin:50% 21px;border-radius:1px;box-shadow:0 0 5px rgba(var(--glow-hi),.6)}

/* needle gauge */
.gauge{width:96px;cursor:ns-resize;touch-action:none}
.gauge .dial{position:relative;height:48px;overflow:hidden}
.gauge .arc{position:absolute;inset:0 0 -48px 0;border:2px solid var(--wash);border-radius:50%}
.gauge .tk{position:absolute;left:50%;top:1px;width:1.5px;height:8px;margin-left:-.75px;background:var(--steel);transform-origin:50% 47px}
.gauge .ndl{position:absolute;left:50%;bottom:0;width:2px;height:40px;background:var(--gold-hi);
  transform-origin:50% 100%;transform:rotate(0deg);border-radius:2px;box-shadow:0 0 6px rgba(var(--glow-hi),.5);
  transition:transform .12s cubic-bezier(.3,1.3,.5,1)}
.gauge .hub{position:absolute;left:50%;bottom:-4px;width:8px;height:8px;margin-left:-4px;border-radius:50%;background:var(--gold)}
.gauge .gv{color:var(--cream);text-align:center;font-size:12px;font-weight:700;margin-top:5px;font-variant-numeric:tabular-nums}

/* segmented VU / LED bar */
.vu{width:170px;display:flex;flex-direction:column;gap:5px}
.vurow{display:flex;align-items:center;gap:7px}
.vurow .ch{color:var(--steel);font-size:.6rem;width:8px}
.vubar{flex:1;display:flex;gap:2px;height:9px}
.vubar i{flex:1;background:var(--wash);border-radius:1px;opacity:.3}
.vubar i.on{opacity:1;background:var(--pass)}.vubar i.hot{opacity:1;background:var(--gold)}
.vubar i.clip{opacity:1;background:var(--fail)}.vubar i.peak{outline:1px solid var(--gold-hi);outline-offset:-1px}

/* mini 4-bar signal */
.sig{display:flex;align-items:flex-end;gap:2px;height:18px}
.sig i{width:4px;background:var(--wash);border-radius:1px}
.sig i:nth-child(1){height:5px}.sig i:nth-child(2){height:9px}.sig i:nth-child(3){height:13px}.sig i:nth-child(4){height:17px}
.sig i.on{background:var(--pass)}.sig i.hot{background:var(--gold)}.sig i.clip{background:var(--fail)}

/* signal ladder (wifi bars) */
.ladder{display:inline-flex;gap:3px;align-items:flex-end;height:18px;cursor:pointer}
.ladder i{width:5px;background:var(--wash);border-radius:1px}
.ladder i:nth-child(1){height:6px}.ladder i:nth-child(2){height:10px}
.ladder i:nth-child(3){height:14px}.ladder i:nth-child(4){height:18px}

/* linear progress / fuel bar */
.bar{width:160px;height:12px;background:#0d0f10;border:1px solid #231f18;border-radius:6px;overflow:hidden;position:relative;cursor:pointer;touch-action:none}
.bar>span{position:absolute;left:0;top:0;bottom:0;background:linear-gradient(90deg,var(--amber-grad-bot),var(--gold));border-radius:6px}
.bar.warn>span{background:linear-gradient(90deg,#a35a3f,var(--fail))}

/* radial ring */
.ring{width:60px;height:60px;border-radius:50%;cursor:ns-resize;touch-action:none;
  background:conic-gradient(var(--gold) calc(var(--p)*1%),var(--wash) 0);
  display:grid;place-items:center;position:relative}
.ring::before{content:"";position:absolute;inset:6px;border-radius:50%;background:var(--well)}
.ring b{position:relative;color:var(--cream);font-size:12px;font-weight:700;font-variant-numeric:tabular-nums}

/* tabular readout */
.readout{color:var(--cream);font-size:24px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.04em;cursor:pointer}
.readout small{color:var(--dim);font-size:12px;font-weight:400}
.readout .u{color:var(--steel);font-size:.6rem;letter-spacing:.2em;display:block;text-align:center;margin-top:2px}

/* sparkline */
.spark{width:170px;height:44px}
.spark svg{display:block;width:100%;height:100%}

/* lamp row (list item) */
.lrow{width:190px;display:flex;align-items:center;gap:9px;padding:6px 8px;border-radius:7px;background:#141210;cursor:pointer;font-size:12.5px}
.lrow:hover{background:var(--wash)}
.lrow .who{color:var(--silver)}.lrow .who b{color:var(--cream)}
.lrow .what{margin-left:auto;color:var(--dim);font-size:11px}

/* arm-to-fire */
.arm{font:inherit;font-size:11.5px;color:var(--silver);cursor:pointer;background:#191715;border:1px solid #33302b;
  border-radius:8px;padding:7px 12px}
.arm.armed{background:rgba(203,107,77,.12);border-color:var(--fail);color:var(--fail)}

/* stepper / segmented selector */
.seg{display:flex;border:1px solid #33302b;border-radius:8px;overflow:hidden}
.seg button{font:inherit;font-size:11px;color:var(--silver);background:#191715;border:0;border-right:1px solid #33302b;padding:7px 11px;cursor:pointer}
.seg button:last-child{border-right:0}
.seg button.on{background:var(--seg-on-bg,linear-gradient(180deg,var(--amber-grad-top),var(--gold)));color:var(--seg-on-ink,var(--panel));font-weight:700}

/* engraved section label */
.engrave{width:180px;color:var(--steel);font-size:.62rem;letter-spacing:.3em;text-transform:uppercase;cursor:pointer;
  display:flex;align-items:center;gap:9px}
.engrave::before,.engrave::after{content:"";height:1px;background:var(--wash);flex:1}
.engrave::before{max-width:10px}
.engrave .cnt{color:var(--dim);letter-spacing:.1em;text-transform:none}

/* waveform strip */
.wave{width:170px;height:38px}
.wave svg{width:100%;height:100%;display:block}

/* toast */
.toastw{font-size:11px;color:var(--cream);background:var(--slate);border-radius:7px;padding:5px 10px;cursor:pointer}

/* output well (log step) */
.owell{width:200px;background:var(--well);border:1px solid var(--wash);border-radius:8px;padding:7px 9px;font-size:11px;cursor:pointer}
.ostep{display:flex;gap:7px;align-items:flex-start;padding:2px 0}
.ostep .lamp{margin-top:3px;width:7px;height:7px}
.ostep b{color:var(--cream);font-weight:700}.ostep .ev{color:var(--steel);display:block;font-size:10.5px}

/* rotary selector */
.rotsel{position:relative;width:118px;height:74px}
.rotsel>.knob{position:absolute;left:50%;top:20px;margin-left:-26px;cursor:pointer}
.rotsel .pos{position:absolute;font-size:9px;color:var(--dim);transform:translate(-50%,-50%);letter-spacing:.02em}
.rotsel .pos.on{color:var(--gold-hi);text-shadow:0 0 6px rgba(var(--glow-hi),.55)}

/* slide-rule tuner dial */
.tuner{width:180px;height:46px;position:relative;border-radius:6px;overflow:hidden;cursor:pointer;
  background:var(--tn-bg,linear-gradient(180deg,#191510,#0b0908));border:1px solid var(--tn-brd,#2a251c);
  box-shadow:inset 0 0 20px var(--tn-glow,rgba(var(--glow-lo),.12)),inset 0 1px 0 rgba(255,255,255,.03)}
.tuner .tick{position:absolute;top:6px;width:1px;height:11px;background:var(--tn-tick,var(--steel));transform:translateX(-50%)}
.tuner .tick.mn{height:6px;opacity:.5}
.tuner .mk{position:absolute;bottom:8px;transform:translateX(-50%);color:var(--tn-ink,var(--steel));font-size:10px}
.tuner .mk.on{color:var(--tn-on,var(--gold-hi));text-shadow:0 0 6px var(--tn-onglow,rgba(var(--glow-hi),.6))}
.tuner:focus{outline:1px solid rgba(var(--glow-lo),.5);outline-offset:2px}
.tuner:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.tuner .ndl{position:absolute;top:3px;bottom:3px;width:2px;margin-left:-1px;border-radius:1px;
  background:var(--tn-ndl,var(--fail));box-shadow:0 0 7px var(--tn-ndlglow,rgba(203,107,77,.85));transition:left .25s}

/* nixie tube */
.nixie{display:inline-flex;gap:5px;cursor:pointer}
.nixie .tube{width:30px;height:44px;border-radius:5px;position:relative;overflow:hidden;
  background:radial-gradient(circle at 50% 38%,#241a12,#0b0807);border:1px solid #2c261d;
  display:grid;place-items:center;box-shadow:inset 0 0 12px rgba(0,0,0,.6)}
.nixie .tube b{font-size:26px;font-weight:400;color:#ff9a3c;
  text-shadow:0 0 6px rgba(255,140,50,.85),0 0 15px rgba(255,120,40,.45)}
.nixie .tube.off b{color:#3a2a1c;text-shadow:none}
.nixie .tube::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 32%)}

/* ===== candidate-unique CSS ===== */
/* rocker */
.rocker{width:66px;height:40px;border-radius:7px;cursor:pointer;position:relative;
  background:linear-gradient(180deg,#25211c,#141210);border:1px solid #34302a;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 3px 6px rgba(0,0,0,.5);overflow:hidden}
.rocker .half{position:absolute;left:0;right:0;height:50%;display:flex;align-items:center;justify-content:center;
  font-size:12px;letter-spacing:.06em;color:var(--dim)}
.rocker .top{top:0;border-bottom:1px solid #0c0b0a;background:linear-gradient(180deg,#211d19,#181513)}
.rocker .bot{bottom:0;background:linear-gradient(180deg,#141210,#100e0c);box-shadow:inset 0 3px 5px rgba(0,0,0,.55)}
.rocker.on .top{background:linear-gradient(180deg,var(--amber-grad-top),var(--gold));color:var(--panel);font-weight:700;box-shadow:0 0 10px rgba(var(--glow-hi),.35)}
.rocker.on .bot{color:var(--steel)}
.rocker:not(.on) .top{color:var(--steel)}
.rocker:not(.on) .bot{background:linear-gradient(180deg,#2a1512,#1c0f0d);color:var(--fail);box-shadow:inset 0 3px 5px rgba(0,0,0,.55),0 0 8px rgba(203,107,77,.25)}

/* transport */
.reels{display:flex;gap:16px;align-items:center;justify-content:center;margin-bottom:2px}
.reel{width:26px;height:26px;border-radius:50%;border:2px solid #34302a;position:relative;
  background:radial-gradient(circle at 45% 40%,#211d18,#0d0b09)}
.reel::before{content:"";position:absolute;inset:9px;border-radius:50%;border:1px solid #4a443a;background:#161310}
.reel i{position:absolute;left:50%;top:50%;width:2px;height:11px;background:var(--steel);margin:-5.5px 0 0 -1px;transform-origin:50% 5.5px}
.reel i:nth-child(1){background:var(--gold-hi);box-shadow:0 0 4px rgba(var(--glow-hi),.55)}
.reel i:nth-child(2){transform:rotate(120deg)}.reel i:nth-child(3){transform:rotate(240deg)}
.transport{display:flex;gap:5px}
.tbtn{font:inherit;font-size:12px;color:var(--silver);cursor:pointer;width:30px;height:26px;display:grid;place-items:center;
  background:linear-gradient(180deg,#23211e,#191715);border:1px solid #33302b;border-bottom-color:#0c0b0a;border-radius:6px}
.tbtn:hover{color:var(--gold);border-color:var(--gold)}
.tbtn.on{color:var(--panel);background:linear-gradient(180deg,var(--amber-grad-top),var(--gold));border-color:var(--gold-hi)}
.tbtn.rec.on{color:var(--cream);background:linear-gradient(180deg,#d98a6f,var(--fail));border-color:var(--fail)}

/* radio bank */
.radiobank{display:flex;gap:0;border:1px solid #0c0b0a;border-radius:7px;overflow:hidden;
  background:#0c0b0a;padding:3px;box-shadow:inset 0 2px 4px rgba(0,0,0,.5)}
.preset{font:inherit;font-size:11px;color:var(--dim);cursor:pointer;padding:8px 9px;border:0;border-radius:4px;
  background:linear-gradient(180deg,#211d19,#161310);box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.preset+.preset{margin-left:3px}
.preset:hover{color:var(--silver)}
.preset.on{color:var(--panel);background:linear-gradient(180deg,var(--amber-grad-top),var(--gold));font-weight:700;
  box-shadow:inset 0 2px 4px rgba(0,0,0,.4)}

/* concentric dual knob */
.dualknob{width:64px;height:64px;position:relative}
.dualknob .outer{width:64px;height:64px;border-radius:50%;position:absolute;inset:0;cursor:ns-resize;touch-action:none;
  background:radial-gradient(circle at 40% 35%,#2a2622,#100e0c);border:1px solid #3a352c;
  box-shadow:inset 0 2px 3px rgba(255,255,255,.05),0 3px 6px rgba(0,0,0,.5)}
.dualknob .outer .tick{position:absolute;left:50%;top:3px;width:2px;height:9px;background:var(--steel);margin-left:-1px;transform-origin:50% 29px}
.dualknob .inner{width:34px;height:34px;border-radius:50%;position:absolute;left:15px;top:15px;cursor:ns-resize;touch-action:none;
  background:radial-gradient(circle at 40% 35%,#37322a,#1a1713);border:1px solid #4a443a;box-shadow:0 2px 4px rgba(0,0,0,.5)}
.dualknob .inner .ind{position:absolute;left:50%;top:3px;width:2px;height:11px;background:var(--gold-hi);margin-left:-1px;
  transform-origin:50% 14px;border-radius:1px;box-shadow:0 0 5px rgba(var(--glow-hi),.6)}

/* rotary encoder + LED ring */
.encoder{position:relative;width:66px;height:66px;display:grid;place-items:center;cursor:ns-resize;touch-action:none}
.encoder .led{position:absolute;width:5px;height:5px;border-radius:50%;background:var(--wash);
  left:50%;top:50%;margin:-2.5px}
.encoder .led.on{background:var(--gold);box-shadow:0 0 5px 1px rgba(var(--glow-lo),.7)}
.encoder .knob{width:40px;height:40px;cursor:ns-resize}
.encoder .knob .ind{transform-origin:50% 15px;top:4px;height:12px}

/* keyed mode switch */
.keylock{position:relative;width:110px;height:70px}
.keylock .body{position:absolute;left:50%;top:30px;margin-left:-21px;width:42px;height:42px;border-radius:50%;
  background:radial-gradient(circle at 42% 36%,#2a2622,#0f0d0b);border:1px solid #3a352c;cursor:pointer;
  box-shadow:inset 0 2px 3px rgba(255,255,255,.05),0 3px 6px rgba(0,0,0,.5)}
.keylock .barrel{position:absolute;left:50%;top:50%;width:5px;height:5px;margin:-2.5px;border-radius:1px;background:#0a0908;
  box-shadow:0 0 2px rgba(0,0,0,.8)}
.keylock .bit{position:absolute;left:50%;top:50%;width:3px;height:15px;margin:-15px 0 0 -1.5px;background:var(--gold-hi);
  border-radius:1px;transform-origin:50% 100%;box-shadow:0 0 5px rgba(var(--glow-hi),.55);transition:transform .2s}
.keylock .kpos{position:absolute;font-size:9px;color:var(--dim);letter-spacing:.05em;transform:translate(-50%,-50%)}
.keylock .kpos.on{color:var(--gold-hi);text-shadow:0 0 6px rgba(var(--glow-hi),.55)}

/* crossfader */
.xfader{width:160px;height:22px;position:relative;cursor:pointer;touch-action:none}
.xfader .slot{position:absolute;top:9px;left:0;right:0;height:4px;border-radius:2px;background:#0d0f10;border:1px solid #231f18}
.xfader .detent{position:absolute;top:2px;left:50%;width:1px;height:18px;background:var(--steel);margin-left:-.5px;opacity:.7}
.xfader .end{position:absolute;top:11px;font-size:9px;color:var(--steel);transform:translateY(-50%)}
.xfader .cap{position:absolute;top:3px;width:9px;height:16px;border-radius:2px;margin-left:-4.5px;transition:left .05s;
  background:linear-gradient(180deg,var(--amber-grad-top),var(--amber-grad-mid));border:1px solid var(--amber-edge);box-shadow:0 1px 2px rgba(0,0,0,.5)}

/* thumbwheel */
.thumbw{display:flex;align-items:center;gap:10px}
.thumbwheel{width:34px;height:52px;border-radius:6px;cursor:ns-resize;touch-action:none;position:relative;overflow:hidden;
  border:1px solid #34302a;box-shadow:inset 0 0 8px rgba(0,0,0,.6);
  background:repeating-linear-gradient(0deg,#0e0c0a 0 2px,#221e19 2px 3px,#2f2a23 3px 5px,#221e19 5px 6px)}
.thumbwheel::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.55),transparent 30%,transparent 70%,rgba(0,0,0,.55))}
.thumbw .win{color:var(--cream);font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
  background:var(--well);border:1px solid #231f18;border-radius:4px;padding:3px 8px}

/* DIP bank */
.dip{display:flex;gap:3px;padding:6px 7px;background:#0f1a2a;border:1px solid #24344a;border-radius:5px;
  box-shadow:inset 0 1px 3px rgba(0,0,0,.5)}
.dipsw{width:12px;height:26px;background:#0a1220;border-radius:2px;position:relative;cursor:pointer;border:1px solid #1c2c42}
.dipsw i{position:absolute;left:1px;right:1px;height:11px;border-radius:1px;background:linear-gradient(180deg,#eae4d2,#b4ad98);
  bottom:1px;transition:bottom .12s,top .12s}
.dipsw.on i{bottom:auto;top:1px;background:linear-gradient(180deg,var(--amber-grad-top),var(--gold))}

/* jog / shuttle */
.jog{position:relative;width:74px;height:74px;cursor:ns-resize;touch-action:none}
.jog .shuttle{position:absolute;inset:0;border-radius:50%;border:6px solid #1a1713;
  background:conic-gradient(from -90deg,#3a352c 0 var(--sh,40deg),#141210 0 360deg);
  box-shadow:inset 0 0 8px rgba(0,0,0,.6)}
.jog .inner{position:absolute;inset:12px;border-radius:50%;transition:transform .05s linear;
  background:radial-gradient(circle at 42% 36%,#2c2822,#100e0c);border:1px solid #3a352c;box-shadow:0 2px 5px rgba(0,0,0,.6)}
.jog .dimple{position:absolute;left:50%;top:7px;width:8px;height:8px;margin-left:-4px;border-radius:50%;
  background:radial-gradient(circle at 40% 35%,#151210,#000);box-shadow:inset 0 1px 2px rgba(0,0,0,.9)}

/* oscilloscope — screen-family vars with the original green as fallback */
.scope{width:176px;height:78px;border-radius:6px;position:relative;overflow:hidden;
  background:radial-gradient(circle at 50% 45%,var(--scr-bgc,#04140a),var(--scr-bge,#020a05));
  border:1px solid var(--scr-brd,#123018);
  box-shadow:inset 0 0 16px rgba(0,0,0,.7)}
.scope .grat{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--scr-grat,rgba(111,206,51,.18)) 1px,transparent 1px),linear-gradient(90deg,var(--scr-grat,rgba(111,206,51,.18)) 1px,transparent 1px);
  background-size:22px 19.5px}
.scope .grat::after{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--scr-gratc,rgba(111,206,51,.35))}
.scope svg{position:absolute;inset:0;width:100%;height:100%}
.scope polyline{fill:none;stroke:var(--scr-hi,var(--phos));stroke-width:1.6;filter:drop-shadow(0 0 3px var(--scr-glow,rgba(127,224,160,.8)))}

/* voice-loop keyset */
.vloop{display:grid;grid-template-columns:repeat(4,52px);gap:4px}
.vk{display:flex;flex-direction:column;align-items:stretch;gap:4px;font-size:7px;letter-spacing:.05em;
  text-align:center;padding:6px 4px 4px;cursor:pointer;
  color:var(--dim);background:linear-gradient(180deg,#23211e,#191715);border:1px solid #33302b;border-radius:4px;
  font-family:var(--mono)}
.vk .bar{height:3px;width:40px;align-self:center;border-radius:2px;background:#16240f}
.vk.mon{color:var(--silver)}
.vk.mon .bar{background:var(--pass);box-shadow:0 0 4px rgba(116,147,47,.6)}
.vk.mon.act .bar{background:#a8d84a;box-shadow:0 0 7px rgba(150,200,60,.9)}
.vk.tlk{color:var(--panel);background:linear-gradient(180deg,var(--amber-grad-top),var(--gold));
  border-color:var(--gold-hi);font-weight:700}
.vk.tlk .bar{background:var(--pass);box-shadow:0 0 4px rgba(116,147,47,.6)}

/* spectrum / EQ */
.eq{display:flex;align-items:flex-end;gap:3px;height:60px}
.eq .band{width:9px;display:flex;flex-direction:column-reverse;gap:2px;height:100%}
.eq .band i{height:5px;border-radius:1px;background:var(--wash);opacity:.3}
.eq .band i.on{opacity:1;background:var(--pass)}
.eq .band i.hot{opacity:1;background:var(--gold)}
.eq .band i.clip{opacity:1;background:var(--fail)}

/* crossed-needle */
.crossm{width:120px}
.crossm .face{position:relative;height:56px;overflow:hidden;cursor:ns-resize;touch-action:none}
.crossm .arc{position:absolute;inset:2px 4px -56px;border:2px solid var(--wash);border-radius:50%}
.crossm .nA{position:absolute;left:14px;bottom:2px;width:2px;height:52px;background:var(--gold-hi);transform-origin:50% 100%;
  border-radius:2px;box-shadow:0 0 5px rgba(var(--glow-hi),.5);transition:transform .12s cubic-bezier(.3,1.2,.5,1)}
.crossm .nB{position:absolute;right:14px;bottom:2px;width:2px;height:52px;background:var(--fail);transform-origin:50% 100%;
  border-radius:2px;box-shadow:0 0 5px rgba(203,107,77,.5);transition:transform .12s cubic-bezier(.3,1.2,.5,1)}
.crossm .lbl{display:flex;justify-content:space-between;color:var(--steel);font-size:9px;margin-top:2px}

/* thermometer */
.thermo{display:flex;align-items:flex-end;gap:6px;height:74px;cursor:ns-resize;touch-action:none}
.thermo .tube{width:12px;height:64px;border-radius:6px 6px 0 0;position:relative;background:#0d0f10;border:1px solid #231f18;overflow:hidden}
.thermo .fill{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(0deg,#a35a3f,var(--fail))}
.thermo .bulb{width:20px;height:20px;border-radius:50%;background:var(--fail);position:absolute;left:-4px;bottom:-9px;
  box-shadow:0 0 6px rgba(203,107,77,.5)}
.thermo .scale{display:flex;flex-direction:column;justify-content:space-between;height:64px;font-size:9px;color:var(--steel)}
.thermo .wrapcol{position:relative;padding-bottom:9px}

/* bourdon */
.bourdon{width:82px;height:82px;border-radius:50%;position:relative;cursor:ns-resize;touch-action:none;
  background:radial-gradient(circle at 48% 42%,#1d1a16,#0c0b09);border:2px solid #2c261d;
  box-shadow:inset 0 2px 5px rgba(0,0,0,.6)}
.bourdon svg{position:absolute;inset:0}
.bourdon .ndl{position:absolute;left:50%;top:50%;width:2px;height:32px;margin:-32px 0 0 -1px;background:var(--gold-hi);
  transform-origin:50% 100%;border-radius:2px;box-shadow:0 0 5px rgba(var(--glow-hi),.55);transition:transform .12s cubic-bezier(.3,1.2,.5,1)}
.bourdon .hub{position:absolute;left:50%;top:50%;width:8px;height:8px;margin:-4px;border-radius:50%;background:var(--gold)}
.bourdon .cap{position:absolute;left:0;right:0;bottom:12px;text-align:center;font-size:8px;letter-spacing:.16em;color:var(--steel)}

/* strip-chart */
.strip{width:176px;height:62px;border-radius:5px;position:relative;overflow:hidden;
  background:#0c0e0f;border:1px solid #231f18}
.strip .rule{position:absolute;inset:0;opacity:.4;
  background-image:linear-gradient(90deg,rgba(150,147,133,.14) 1px,transparent 1px);background-size:16px 100%}
.strip svg{position:absolute;inset:0;width:100%;height:100%}
.strip polyline{fill:none;stroke:var(--gold);stroke-width:1.4}
.strip .pen{position:absolute;right:2px;width:6px;height:6px;margin:-3px;border-radius:50%;background:var(--gold-hi);
  box-shadow:0 0 6px rgba(var(--glow-hi),.8);transition:top .08s linear}

/* correlation */
.corr{width:150px;cursor:pointer;touch-action:none}
.corr .face{position:relative;height:44px;overflow:hidden}
.corr .arc{position:absolute;inset:0 0 -44px;border:2px solid var(--wash);border-radius:50%}
.corr .zero{position:absolute;left:50%;top:2px;width:1px;height:10px;background:var(--gold);margin-left:-.5px}
.corr .ndl{position:absolute;left:50%;bottom:0;width:2px;height:38px;background:var(--gold-hi);transform-origin:50% 100%;
  border-radius:2px;box-shadow:0 0 5px rgba(var(--glow-hi),.5);transition:transform .1s ease-out}
.corr .lbl{display:flex;justify-content:space-between;color:var(--steel);font-size:9px;margin-top:2px}

/* battery */
.batt{display:flex;align-items:center;cursor:pointer;touch-action:none}
.batt .cells{display:flex;gap:2px;padding:3px;border:1px solid #34302a;border-radius:4px;background:#0d0f10}
.batt .cell{width:12px;height:26px;border-radius:1px;background:var(--wash);opacity:.35}
.batt .cell.on{opacity:1;background:linear-gradient(180deg,var(--pass),#5c7526)}
.batt .cell.warn.on{background:linear-gradient(180deg,var(--fail),#a04a34)}
.batt .nub{width:4px;height:12px;background:#34302a;border-radius:0 2px 2px 0}

/* split-flap */
.flap{display:inline-flex;gap:4px;cursor:pointer}
.flapd{width:30px;height:42px;border-radius:5px;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#211d18,#141210);border:1px solid #34302a;box-shadow:0 2px 4px rgba(0,0,0,.5)}
.flapd b{position:absolute;inset:0;display:grid;place-items:center;font-size:24px;color:var(--cream);
  text-shadow:0 1px 2px rgba(0,0,0,.7)}
.flapd::after{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:rgba(0,0,0,.65);box-shadow:0 1px 0 rgba(255,255,255,.03)}
.flapd.flip b{animation:flipdrop .3s ease-in}
@keyframes flipdrop{0%{transform:translateY(-42%) scaleY(.4);opacity:.3}100%{transform:none;opacity:1}}

/* seven-segment */
.seven{display:inline-flex;gap:6px;padding:6px 9px;border-radius:6px;background:#0a0806;border:1px solid #231f18;cursor:pointer;
  box-shadow:inset 0 0 10px rgba(0,0,0,.6)}
.seg7{width:22px;height:40px;filter:drop-shadow(0 0 3px rgba(87,211,87,.55))}
.seg7.red{filter:drop-shadow(0 0 3px rgba(226,84,63,.55))}
.seven .colon{align-self:center;display:flex;flex-direction:column;gap:9px}
.seven .colon i{width:4px;height:4px;border-radius:50%;background:var(--sevgrn);box-shadow:0 0 4px rgba(87,211,87,.7)}

/* DSKY verb/noun panel */
.dsky{display:flex;gap:9px;align-items:stretch;background:#1c1916;border:1px solid #060505;border-radius:8px;padding:8px}
.dsky .lampcol{display:grid;grid-template-rows:repeat(6,1fr);gap:3px;width:52px}
.dsky .sl{font-size:6.5px;letter-spacing:.04em;display:flex;align-items:center;justify-content:center;text-align:center;
  background:#141210;color:#5c574c;border-radius:2px;border:1px solid #26221c}
.dsky .sl.on{background:linear-gradient(180deg,var(--amber-warn),var(--gold));color:var(--panel);font-weight:700;
  box-shadow:0 0 6px rgba(var(--glow-lo),.5)}
.dsky .right{display:flex;flex-direction:column;gap:6px}
.dsky .wins{display:flex;gap:8px}
.dsky .win{display:flex;flex-direction:column;align-items:center;gap:2px}
.dsky .win .wl{font-size:6px;letter-spacing:.14em;color:var(--steel)}
.dsky .win .wd{display:flex;gap:2px;background:#0a0806;border:1px solid #231f18;border-radius:4px;padding:3px 4px}
.dsky .win .wd .seg7{width:13px;height:24px}
.dsky .win.hot .wd{border-color:var(--gold);box-shadow:0 0 5px rgba(var(--glow-lo),.4)}
.dsky .pad{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.dsky .pad .key{padding:4px 0;font-size:8.5px;border-radius:5px;text-align:center;letter-spacing:.03em}

/* VFD marquee */
.vfdm{width:176px;height:34px;border-radius:5px;overflow:hidden;position:relative;cursor:pointer;
  background:linear-gradient(180deg,#04100e,#020807);border:1px solid #123028;box-shadow:inset 0 0 12px rgba(0,0,0,.6)}
.vfdm .txt{position:absolute;top:50%;transform:translateY(-50%);white-space:nowrap;font-size:15px;letter-spacing:.22em;
  color:var(--vfd);text-shadow:0 0 6px rgba(99,230,200,.65)}
.vfdm .mesh{position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:radial-gradient(rgba(0,0,0,.6) 40%,transparent 41%);background-size:3px 3px}

/* annunciator */
.annwrap{display:flex;flex-direction:column;gap:6px}
.annbar{display:flex;gap:5px;align-items:center}
.mc{font-size:7px;letter-spacing:.08em;padding:4px 8px;border-radius:3px;background:#141210;color:#5c574c;
  border:1px solid #26221c;text-align:center}
.mc.on{background:linear-gradient(180deg,#d98a6f,var(--fail));color:var(--cream);font-weight:700;
  box-shadow:0 0 8px rgba(203,107,77,.5)}
.mc.on.fl{animation:pulse var(--pulse-rate) ease-in-out infinite}
.annbar .key{padding:3px 7px;font-size:7.5px;border-radius:4px}
.annun{display:grid;grid-template-columns:repeat(3,1fr);gap:3px}
.acell{font-size:8.5px;letter-spacing:.08em;text-align:center;color:var(--dim);padding:6px 4px;border-radius:3px;cursor:pointer;
  background:#141210;border:1px solid #262320;line-height:1.2}
.acell.warn{color:var(--panel);background:linear-gradient(180deg,var(--amber-warn),var(--gold));font-weight:700;box-shadow:0 0 8px rgba(var(--glow-lo),.4)}
.acell.fault{color:var(--cream);background:linear-gradient(180deg,#d98a6f,var(--fail));font-weight:700;box-shadow:0 0 8px rgba(203,107,77,.4);animation:pulse var(--pulse-rate) ease-in-out infinite}

/* jewel */
.jewel{width:24px;height:24px;border-radius:50%;position:relative;cursor:pointer;
  background:radial-gradient(circle at 36% 30%,rgba(255,255,255,.75),var(--jc) 42%,#3a0d08 100%);
  box-shadow:0 0 10px 1px var(--jc),inset 0 -2px 3px rgba(0,0,0,.5)}
.jewel::after{content:"";position:absolute;inset:0;border-radius:50%;
  background:conic-gradient(from 0deg,rgba(255,255,255,.12) 0 22deg,transparent 22deg 45deg,rgba(0,0,0,.18) 45deg 67deg,transparent 67deg 90deg);
  background-repeat:repeat}
.jewel.dim{background:radial-gradient(circle at 36% 30%,rgba(120,120,120,.3),#241f1b 55%,#0e0c0a);box-shadow:inset 0 -2px 3px rgba(0,0,0,.5)}

/* tape counter */
.counter{display:inline-flex;gap:2px;padding:4px;background:#0c0b0a;border:1px solid #2c261d;border-radius:4px;
  box-shadow:inset 0 1px 3px rgba(0,0,0,.6)}
.cwheel{width:18px;height:34px;border-radius:2px;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#efe9d6,#c7c0ac);box-shadow:inset 0 0 3px rgba(0,0,0,.3)}
.cwheel .col{position:absolute;left:0;right:0;text-align:center;color:#1a1613;font-size:18px;font-weight:700;line-height:34px;
  transition:top .35s cubic-bezier(.4,1.4,.5,1)}
.cwheel .col span{display:block;height:34px}
.cwheel::before,.cwheel::after{content:"";position:absolute;left:0;right:0;height:9px;z-index:2;pointer-events:none}
.cwheel::before{top:0;background:linear-gradient(180deg,rgba(0,0,0,.4),transparent)}
.cwheel::after{bottom:0;background:linear-gradient(0deg,rgba(0,0,0,.4),transparent)}
.counter .redw{background:linear-gradient(180deg,#e7b46a,#cf9440)}

/* analog clock */
.clock{width:78px;height:78px;border-radius:50%;position:relative;
  background:radial-gradient(circle at 46% 40%,#1c1915,#0c0b09);border:2px solid #2c261d;box-shadow:inset 0 2px 5px rgba(0,0,0,.6)}
.clock .tk{position:absolute;left:50%;top:4px;width:1.5px;height:6px;background:var(--steel);margin-left:-.75px;transform-origin:50% 35px}
.clock .hh{position:absolute;left:50%;top:50%;width:3px;height:20px;margin:-20px 0 0 -1.5px;background:var(--cream);
  transform-origin:50% 100%;border-radius:2px}
.clock .mh{position:absolute;left:50%;top:50%;width:2px;height:28px;margin:-28px 0 0 -1px;background:var(--silver);
  transform-origin:50% 100%;border-radius:2px}
.clock .sh{position:absolute;left:50%;top:50%;width:1px;height:30px;margin:-30px 0 0 -.5px;background:var(--gold-hi);
  transform-origin:50% 100%;box-shadow:0 0 4px rgba(var(--glow-hi),.5)}
.clock .pin{position:absolute;left:50%;top:50%;width:6px;height:6px;margin:-3px;border-radius:50%;background:var(--gold)}

/* frequency-dial scale */
.freqscale{width:184px;height:44px;position:relative;border-radius:5px;overflow:hidden;cursor:pointer;touch-action:none;
  background:linear-gradient(180deg,#191510,#0b0908);border:1px solid #2a251c;
  box-shadow:inset 0 0 16px rgba(var(--glow-lo),.1)}
.freqscale .tick{position:absolute;top:5px;width:1px;background:var(--steel);transform:translateX(-50%)}
.freqscale .mk{position:absolute;bottom:6px;transform:translateX(-50%);color:var(--steel);font-size:9px}
.freqscale .band{position:absolute;bottom:2px;left:6px;color:var(--gold);font-size:8px;letter-spacing:.18em}
.freqscale .fptr{position:absolute;top:3px;bottom:14px;width:2px;margin-left:-1px;border-radius:1px;
  background:var(--fail);box-shadow:0 0 7px rgba(203,107,77,.85)}

/* patch-bay */
.patch{padding:7px 9px;background:#141210;border:1px solid #2c261d;border-radius:5px;position:relative}
.patch .row{display:flex;gap:9px}
.patch .row+.row{margin-top:9px}
.patch .jack{width:13px;height:13px;border-radius:50%;cursor:pointer;background:radial-gradient(circle at 40% 35%,#3a352c,#0a0908 70%);
  border:1px solid #4a443a;box-shadow:inset 0 1px 2px rgba(0,0,0,.8)}
.patch .jack.hot{background:radial-gradient(circle at 40% 35%,var(--amber-edge),#1a1408 70%)}
.patch .jack.sel{border-color:var(--gold-hi);box-shadow:0 0 6px 1px rgba(var(--glow-hi),.7)}
.patch svg{position:absolute;inset:0;pointer-events:none;width:100%;height:100%}
.patch svg path{fill:none;stroke:var(--gold);stroke-width:2.4;opacity:.85;stroke-linecap:round}

/* ===== reference-batch (R) widgets — SVG-first, after period hardware ===== */
.rsvg{display:block}
.rsvg.drag{cursor:ns-resize;touch-action:none}
.rsvg.press{cursor:pointer}

/* transport reels spin (was a page-side keyframe injector) */
@keyframes reelspin{to{transform:rotate(360deg)}}
.reel.spin{animation:reelspin 2.6s linear infinite}
`;
function ensureCss() {
  if (document.getElementById('gw-css') || !GW_CSS) return;
  const st = document.createElement('style'); st.id = 'gw-css'; st.textContent = GW_CSS;
  document.head.appendChild(st);
}
if (document.head) ensureCss();
else document.addEventListener('DOMContentLoaded', ensureCss);

Object.assign(GW, { SVGNS, svgEl, polar, dragX, dragY, dragDelta, SEG, seg7, buildBars, VUDB, vuDb, SCREEN_FAMS });
window.GW = GW;
})();