From ec4638af410e0aa6c91880e0f61c835c53e633e7 Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Mon, 19 Oct 2026 15:01:56 -0500
Subject: feat(reveal): left-align slide content by default

reveal.js centers every slide, which reads fine for a title and badly for paragraphs and lists. I left-aligned section content in the head preamble and kept the title slide and standalone images centered, where centering still reads right.
---
 modules/org-reveal-config.el           | 9 +++++++--
 tests/test-org-reveal-config-sizing.el | 7 +++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/modules/org-reveal-config.el b/modules/org-reveal-config.el
index e5358b13..ddb0803d 100644
--- a/modules/org-reveal-config.el
+++ b/modules/org-reveal-config.el
@@ -99,8 +99,10 @@ Reveal.initialize call."
 
 (defun cj/--reveal-head-preamble ()
   "Return the <style> element for the document head.
-Sets the house font sizes through the theme variables and stops the
-theme from upper-casing headings."
+Sets the house font sizes through the theme variables, stops the theme
+from upper-casing headings, and left-aligns slide text (reveal centers
+everything by default); the title slide and standalone images keep the
+centering."
   (format "<style>
 :root {
   --r-main-font-size: %s;
@@ -110,6 +112,9 @@ theme from upper-casing headings."
   --r-heading4-size: 1em;
 }
 .reveal h1, .reveal h2, .reveal h3, .reveal p { text-transform: none; }
+.reveal .slides section { text-align: left; }
+.reveal .slides #sec-title-slide { text-align: center; }
+.reveal .slides section .figure { text-align: center; }
 </style>"
           cj/reveal-base-font-size))
 
diff --git a/tests/test-org-reveal-config-sizing.el b/tests/test-org-reveal-config-sizing.el
index ea27b718..19e4e173 100644
--- a/tests/test-org-reveal-config-sizing.el
+++ b/tests/test-org-reveal-config-sizing.el
@@ -70,6 +70,13 @@
   "Normal: the rule that stops the theme upper-casing headings survives the rewrite."
   (should (string-match-p "text-transform: *none" (cj/--reveal-head-preamble))))
 
+(ert-deftest test-org-reveal-config-head-preamble-normal-left-aligns-slide-content ()
+  "Normal: slide text is left-aligned by default; the title slide and standalone images keep reveal's centering."
+  (let ((css (cj/--reveal-head-preamble)))
+    (should (string-match-p "\\.reveal \\.slides section {[^}]*text-align: *left" css))
+    (should (string-match-p "#sec-title-slide {[^}]*text-align: *center" css))
+    (should (string-match-p "section \\.figure {[^}]*text-align: *center" css))))
+
 (ert-deftest test-org-reveal-config-head-preamble-boundary-one-style-element ()
   "Boundary: exactly one <style> element, opened and closed."
   (let ((css (cj/--reveal-head-preamble)))
-- 
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