diff --git a/emacs/dist/tufte.css b/emacs/dist/tufte.css
index e07d1ff..3306124 100644
--- a/emacs/dist/tufte.css
+++ b/emacs/dist/tufte.css
@@ -128,6 +128,15 @@ h3 {
   line-height: 1;
 }
 
+h4 {
+  font-style: italic;
+  font-weight: 400;
+  font-size: 1.5rem;
+  margin-top: 2rem;
+  margin-bottom: 1.4rem;
+  line-height: 1;
+}
+
 hr {
   display: block;
   height: 1px;