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 7144eeb..323eaf7 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
@@ -338,7 +338,13 @@
 }
 
 .reveal {
+  // Bold ("highlighted") text gets the orange colour AND the condensed Fira
+  // Sans face, as in the IDS reference decks -- the lighter weight and 90%
+  // size keep it from dominating the serif body text.
   strong, b {
+          font-family: "Fira Sans Condensed", sans-serif;
+          font-weight: 600;
+          font-size: 90%;
           color: var(--r-bold-color);
   }
 
diff --git a/inst/reveal.js-5.2.1/dist/theme/ids.css b/inst/reveal.js-5.2.1/dist/theme/ids.css
index b7879a9..76de151 100644
--- a/inst/reveal.js-5.2.1/dist/theme/ids.css
+++ b/inst/reveal.js-5.2.1/dist/theme/ids.css
@@ -546,7 +546,13 @@
   --r-list-bullet-color: #f6a800;
 }
 
+/* Bold ("highlighted") text gets the orange colour AND the condensed Fira
+   Sans face, as in the IDS reference decks -- the lighter weight and 90%
+   size keep it from dominating the serif body text. */
 .reveal strong, .reveal b {
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-weight: 600;
+  font-size: 90%;
   color: var(--r-bold-color);
 }