Actually use SCSS structure in app.scss

Start/Client/Sass/app.scss

@@ -23,13 +23,13 @@
     position: fixed;
     width: 100%;
     z-index: 1000;
-}
 
-#blazor-error-ui .dismiss {
+    .dismiss {
         cursor: pointer;
         position: absolute;
         right: 0.75rem;
         top: 0.5rem;
+    }
 }
 
 
@@ -59,36 +59,36 @@
 #sidebar {
     display: flex;
     flex-direction: column;
-}
 
-#sidebar #sidebarHeading {
+    #sidebarHeading {
         padding: 0.5rem 1.5rem;
         display: flex;
         flex-direction: row;
         align-items: center;
         justify-content: space-between;
-}
 
-#sidebar #sidebarHeading h1 {
+        h1 {
             margin: 0;
-}
+        }
+    }
 
-#sidebar .nav {
+    .nav {
         padding: 0.5rem 1.5rem;
-}
+    }
 
-#sidebar #sidebarItems {
+    #sidebarItems {
         flex: 1; /* Fill remaining space */
         overflow-y: auto;
-}
+    }
 
-#sidebar .accountActions {
+    .accountActions {
         border-top: solid 1px #dadee4;
-}
 
-#sidebar .accountActions .accountName {
+        .accountName {
             font-weight: bold;
             margin-bottom: 1em;
+        }
+    }
 }
 
 .off-canvas .off-canvas-content {
@@ -103,20 +103,24 @@
     width: 100%;
     display: flex;
     align-items: center;
-}
 
-#containerTabStrip #menuButton {
+    #menuButton {
         flex: 0 0 auto;
         margin-right: 1em;
         margin-left: 1em;
-}
 
-#containerTabStrip .containerList {
+        .icon {
+            transform: scale(1.2);
+        }
+    }
+
+    .containerList {
         flex: 1 0 0;
-}
 
-#containerTabStrip .containerList .tab-item a {
+        .tab-item a {
             padding: .6rem .4rem .6rem .4rem;
+        }
+    }
 }
 
 #bookmarkGroups {
@@ -127,24 +131,18 @@
     display: grid;
     grid-column-gap: 1.25rem;
     grid-row-gap: 1.25rem;
-}
 
-@media screen and (max-width: 960px) {
+    @media screen and (max-width: 960px) {
-    #bookmarkGroups {
         grid-template-columns: repeat(1, 1fr);
         padding: 1em;
     }
-}
 
-@media screen and (min-width: 960px) {
+    @media screen and (min-width: 960px) {
-    #bookmarkGroups {
         grid-template-columns: repeat(2, 1fr);
         width: 60%;
     }
-}
 
-@media screen and (min-width: 1440) {
+    @media screen and (min-width: 1440) {
-    #bookmarkGroups {
         grid-template-columns: repeat(3, 1fr);
         width: 60%;
     }
@@ -152,31 +150,31 @@
 
 .bookmarkGroup {
     width: 100%;
-}
 
-.bookmarkGroup .card-header {
+    .card-header {
         padding-top: 0;
-}
+    }
 
-.bookmarkGroup .card-title {
+    .card-title {
         margin-top: 0.5em;
-}
+    }
 
-.bookmarkGroup .card-body {
+    .card-body {
         padding: 0;
-}
+    }
 
-.bookmarkGroup .card-body:last-child {
+    .card-body:last-child {
         padding: 0;
+    }
 }
 
 ul.bookmarks {
     list-style: none;
     margin: 0;
-}
 
-li.noBookmarksItem {
+    li.noBookmarksItem {
         margin-top: 0;
+    }
 }
 
 .addBookmarkGroupButton button {