diff --git a/app/assets/stylesheets/views/article.scss b/app/assets/stylesheets/views/article.scss
index 1e2825537..76861723e 100644
--- a/app/assets/stylesheets/views/article.scss
+++ b/app/assets/stylesheets/views/article.scss
@@ -86,6 +86,7 @@
     box-shadow: none;
     justify-content: stretch;
     top: calc(var(--header-height) + var(--layout-padding) + 6vh);
+    z-index: var(--z-elevate);
   }
 
   &__inner {