diff --git a/app/assets/stylesheets/card-columns.css b/app/assets/stylesheets/card-columns.css
index be049c19c..5ce002828 100644
--- a/app/assets/stylesheets/card-columns.css
+++ b/app/assets/stylesheets/card-columns.css
@@ -461,7 +461,7 @@
         inset: calc(var(--column-width-collapsed) + var(--block-space-half)) 0 0 0;
         mask: var(--wavy-background-mask);
         position: absolute;
-        z-index: 0;
+        z-index: -1;
       }
     }