fixup! fixup! fixup! fixup! Re-implement Modal component using HTML…

…DialogElement (#461)

src/components/Modal/Modal.module.scss

@@ -2,7 +2,6 @@
 //    * visibility of the .root element and its backdrop is managed by the browser
 //    * positioning of the .root element and its backdrop is managed by the browser
 //    * z-index of the .root element and its backdrop is not needed as dialog is rendered in browser's Top layer
-// 2. When dialogs are stacked, only the topmost dialog should have a backdrop.
 
 @use "sass:map";
 @use "../../styles/theme/typography";
@@ -36,10 +35,6 @@
         }
     }
 
-    .root:has(.root)::backdrop {
-        background: transparent; // 2.
-    }
-
     .root[open] {
         display: flex;
         animation: fade-in theme.$animation-duration ease-out;