forgot hover on ref copy popup

assets/css/app.scss

@@ -475,8 +475,8 @@ section[role="main-content"]{
             border-radius: 3px;
             padding: 1em 1em 1em 1.5em;
             box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
-            // display: none;
-            // opacity: 0.1;
+            display: none;
+            opacity: 0.1;
             // outline: 1px solid blue;
             transition: opacity 2s ease-in-out;
             button.copy-btn{