hide dark overlay

app/components/SimpleEditor/SimpleEditor.scss

@@ -257,18 +257,20 @@ $active-blue: #4a90e2;
       outline: none;
     }
 
-    .sc-prose-editor-overlay-tools {
+    .sc-overlay {
       .se-active-tools {
         background: transparent;
         border: 0;
+        border-radius: 0;
         padding: 0;
       }
     }
 
-    .sc-prose-editor-overlay-tools::before {
+    .sc-overlay.sm-theme-dark::before {
       border-style: none;
       border-width: 0;
-  }
+    }
+
   ul > li {
     list-style-type: disc;
   }