Make sure it's an inline block

sitefiles/sig.css

@@ -73,6 +73,8 @@ body{
     }
     
     .contentBody .contentWrapper:hover:after{
+        display: inline-block;
+        background-color:rgba(255, 255, 255, .06);
         min-width:98vw;
         text-align:center;
         font-size:2.75em;