1 files changed, 9 insertions, 6 deletions

diff --git a/scripts/theme-studio/theme-studio.html b/scripts/theme-studio/theme-studio.html
index 7d4ccf9d..44156648 100644
--- a/scripts/theme-studio/theme-studio.html
+++ b/scripts/theme-studio/theme-studio.html
@@ -551,9 +551,12 @@ function lMax(hue,chroma,fgSet,target){
 // assignment re-point across a regenerate.
 
 function oklchOf(hex){return oklab2oklch(srgb2oklab(hex));}
+function isReservedGroundLikeName(name){return /^(bg|fg)(?:[-_+].+|\d.*)$/i.test(name||'');}
 function columnStem(name){name=name||'color';if(/^color-\d+$/.test(name))return name;name=name.replace(/[+-]\d+$/,'');return name.replace(/\d+$/,'')||'color';}
 function columnOffset(name){const m=(name||'').match(/([+-]\d+)$/);return m?parseInt(m[1],10):0;}
-function columnIdOf(entry){return (entry&&entry[2])||columnStem(entry&&entry[1]);}
+function legacyColumnStem(name){return isReservedGroundLikeName(name)?name:columnStem(name);}
+function legacyColumnOffset(name){return isReservedGroundLikeName(name)?0:columnOffset(name);}
+function columnIdOf(entry){return (entry&&entry[2])||legacyColumnStem(entry&&entry[1]);}
 function groundRoleOfEntry(entry,ground){
   if(!entry)return null;
   const [hex,name]=entry,col=entry[2],n=(name||'').toLowerCase(),h=(hex||'').toLowerCase();
@@ -587,9 +590,9 @@ function columnsFromPalette(palette,ground){
   for(const entry of palette){
     const [hex,name]=entry;
     if(groundRoleOfEntry(entry,ground))continue;
-    const column=columnIdOf(entry);
+    const column=columnIdOf(entry),offset=entry[2]?columnOffset(name):legacyColumnOffset(name);
     if(!byColumn.has(column))byColumn.set(column,{column,members:[]});
-    byColumn.get(column).members.push({hex,name,offset:columnOffset(name),column});
+    byColumn.get(column).members.push({hex,name,offset,column});
   }
   for(const f of byColumn.values()){
     const base=(f.members.find(m=>m.offset===0)||f.members[0]).hex;
@@ -811,7 +814,7 @@ function repointHex(oldHex,newHex){
 function healGone(name,newHex){const k=name.toLowerCase();if(!(k in lastGone))return false;const g=lastGone[k];delete lastGone[k];repointHex(g,newHex);return true;}
 function normalizePaletteEntry(entry){
   const hex=entry&&entry[0],name=(entry&&entry[1])||'color';
-  return [hex,name,(entry&&entry[2])||columnStem(name)];
+  return [hex,name,(entry&&entry[2])||columnIdOf(entry)];
 }
 function normalizePalette(){PALETTE=PALETTE.map(normalizePaletteEntry);}
 // The ground column is explicit: bg pins the dark endpoint, fg pins the light
@@ -1111,7 +1114,7 @@ function initPicker(){const sw=document.getElementById('swatch');if(!sw)return;s
 function addColor(){const h=curHex();const name=document.getElementById('newname').value.trim();
   if(!name){notify('name the color before adding it',true);return;}
   if(PALETTE.some(p=>p[1].toLowerCase()===name.toLowerCase())){notify('a color named "'+name+'" already exists — select it and use Update selected to change its value',true);return;}
-  PALETTE.push([h,name,columnStem(name)]);const healed=healGone(name,h);document.getElementById('newname').value='';selectedIdx=null;closePicker();
+  PALETTE.push([h,name,columnIdOf([h,name])]);const healed=healGone(name,h);document.getElementById('newname').value='';selectedIdx=null;closePicker();
   renderPalette();buildTable();buildUITable();
   if(healed){renderCode();applyGround();if(document.getElementById('pkgbody'))buildPkgTable();buildPkgPreview();}
   notify(healed?('added "'+name+'" and reconnected its assignments'):('added "'+name+'"'),false);}
@@ -1966,7 +1969,7 @@ if(location.hash==='#columntest'||location.hash==='#familytest'){let ok=true;con
  A(!!renamed&&renamed.closest('.fstrip').dataset.column===redColumn,'a renamed color stays in the same strip');
  PALETTE=[['#0d0b0a','bg','ground'],['#f0fef0','fg','ground'],['#0d0b0a','bg2'],['#0d0b0a','bg-alt']];MAP['bg']='#0d0b0a';MAP['p']='#f0fef0';selectedIdx=null;renderPalette();
  const bg2Chip=[...document.querySelectorAll('#pals .pchip')].find(c=>c.querySelector('.nm')&&c.querySelector('.nm').value==='bg2');
- A(!!bg2Chip&&bg2Chip.closest('.fstrip').dataset.column==='bg'&&!!bg2Chip.querySelector('.rm')&&!bg2Chip.querySelector('.lock'),'same-hex bg2 remains a normal removable color column chip');
+ A(!!bg2Chip&&bg2Chip.closest('.fstrip').dataset.column==='bg2'&&!!bg2Chip.querySelector('.rm')&&!bg2Chip.querySelector('.lock'),'same-hex bg2 remains a normal removable color column chip');
  if(bg2Chip){bg2Chip.click();document.getElementById('newhexstr').value='#101820';document.getElementById('newname').value='bg2';updateColor();}
  A(MAP['bg']==='#0d0b0a','editing same-hex bg2 does not repoint the real bg assignment');
  A(PALETTE.some(p=>p[1]==='bg2'&&p[0]==='#101820'),'editing same-hex bg2 updates only that palette tile');