diff --git a/docs/css/style.css b/docs/css/style.css
index 6d58018..7a09735 100644
--- a/docs/css/style.css
+++ b/docs/css/style.css
@@ -60,4 +60,10 @@ pre tr:nth-child(even) { background: #fff; }
 
 .social a {
   text-decoration: none;
+}
+
+mark {
+  background: linear-gradient(-100deg, hsla(48,92%,75%,.3), hsla(48,92%,75%,.7) 95%, hsla(48,92%,75%,.1));
+  border-radius: 1em 0;
+  padding: .5rem;
 }
\ No newline at end of file
diff --git a/themes/hugo-xmin/static/css/style.css b/themes/hugo-xmin/static/css/style.css
index 6d58018..7a09735 100644
--- a/themes/hugo-xmin/static/css/style.css
+++ b/themes/hugo-xmin/static/css/style.css
@@ -60,4 +60,10 @@ pre tr:nth-child(even) { background: #fff; }
 
 .social a {
   text-decoration: none;
+}
+
+mark {
+  background: linear-gradient(-100deg, hsla(48,92%,75%,.3), hsla(48,92%,75%,.7) 95%, hsla(48,92%,75%,.1));
+  border-radius: 1em 0;
+  padding: .5rem;
 }
\ No newline at end of file