update css

_extensions/inst/css/revealjs.css

@@ -154,6 +154,14 @@ section#TOC a:hover {
   list-style-type: circle;
 }
 
+li:hover {
+  font-weight: bold;
+}
+
+.reveal p:hover {
+  font-weight: bold;
+}
+
 .reveal ul li {
   line-height: 1.2em;
 }
@@ -315,6 +323,11 @@ figure > figcaption {
     font-size: x-large;
 }
 
+.reveal pre code:hover{
+    font-size: xx-large;
+  line-height: 250%;
+}
+
 section#title-slide p.subtitle {
     font-size: var(--r-heading3-size);
     text-decoration: none;
@@ -326,3 +339,7 @@ section#title-slide p.subtitle {
     min-height: 100%;
     font-size: x-large;
 }
+
+.reveal div.sourceCode pre code:hover {
+    font-size: xx-large;
+}