diff --git a/css/post-toc.css b/css/post-toc.css
index 71dad081..5707c0b3 100644
--- a/css/post-toc.css
+++ b/css/post-toc.css
@@ -19,6 +19,7 @@
 	border: thick solid var(--color-pink);
 	border-radius: 1rem;
 	margin-top: 1rem;
+	background-color: var(--color-bg);
 }
 
 #toc summary {