diff --git a/src/less/include/common.less b/src/less/include/common.less
index f2fe9cb..1110f2b 100644
--- a/src/less/include/common.less
+++ b/src/less/include/common.less
@@ -61,7 +61,7 @@ figure {
 }
 
 h1, h2, h3, h4, h5, h6 {
-  margin: 3em 0 1em;
+  margin: 2rem 0 0.2rem;
 }
 
 h1 {
@@ -70,6 +70,16 @@ h1 {
 
 h2 {
   font-size: 1.5rem;
+  border-bottom-width: 1px;
+  border-bottom-style: solid;
+
+  @media (prefers-color-scheme: dark) {
+    border-bottom-color: @dark-foreground;
+  }
+
+  @media (prefers-color-scheme: light) {
+    border-bottom-color: @light-foreground;
+  }
 }
 
 h3 {