diff --git a/inst/reveal.js-5.2.1/css/theme/source/ids.scss b/inst/reveal.js-5.2.1/css/theme/source/ids.scss
index e0a7634..e833b8f 100644
--- a/inst/reveal.js-5.2.1/css/theme/source/ids.scss
+++ b/inst/reveal.js-5.2.1/css/theme/source/ids.scss
@@ -202,11 +202,17 @@
 
 // Ordered lists: the CSS list-item counter honours the HTML start/value
 // attributes, so pandoc's `start`/`value` lists keep their numbers. Numbers
-// are right-aligned into the indent, ending just before the item text.
+// are anchored with their right edge $idsNumberGap away from the item text
+// (a shrink-to-fit box; anchoring from the right instead of a fixed-width,
+// right-aligned box, because over-wide numbers would otherwise overflow
+// INTO the text). Longer numbers like "10." grow to the left.
+$idsNumberGap: 0.3em;
+
 .reveal .slides section:not(.title-frame) ol > li::before {
   content: counter(list-item, decimal) "." !important;
-  width: calc(#{$idsListIndent} - 0.12em) !important;
-  text-align: right !important;
+  left: auto !important;
+  right: 100% !important;
+  margin-right: $idsNumberGap !important;
 }
 
 // Checkbox (pandoc task) lists keep their checkboxes, no markers on top.
@@ -1124,9 +1130,23 @@
 /*********************************************
  * OVERVIEW / TOC SLIDES
  *********************************************/
-/* Entries stay at the normal slide body size and keep the theme's link
-   colour, so they read as the navigation links they are. Only the denser
-   two-column variant with sub-headings is scaled down. */
+/* The auto-generated TOC lists the chapters with their numbers as
+   .ids-toc-number spans in the marker colour, prepended to the entry
+   titles: the enumeration therefore starts flush with the slide heading
+   (the drawn ol/ul markers are suppressed for the top-level entries;
+   sub-headings below their chapters keep their bullets). Entries stay at
+   the normal slide body size and keep the theme's link colour, so they
+   read as the navigation links they are. Only the denser two-column
+   variant with sub-headings is scaled down. */
+.reveal .slides section:not(.title-frame) .ids-overview-toc {
+  padding-left: 0 !important;
+}
+.reveal .slides section:not(.title-frame) .ids-overview-toc > li::before {
+  content: none !important;
+}
+.reveal .ids-overview-toc .ids-toc-number {
+  color: var(--r-list-bullet-color);
+}
 .reveal .ids-overview-toc {
   list-style: none;
   margin: 0.2em 0 0 0;