diff --git a/aio/src/styles/2-modules/_toc.scss b/aio/src/styles/2-modules/_toc.scss
index b9800c9a56..c4e6b0b0b6 100644
--- a/aio/src/styles/2-modules/_toc.scss
+++ b/aio/src/styles/2-modules/_toc.scss
@@ -50,140 +50,140 @@
         background: $lightgray;
       }
     }
+  }
 
-    &.toc-heading {
-      mat-icon.rotating-icon {
-        height: 18px;
-        width: 18px;
-        position: relative;
-        left: -4px;
-        top: 5px;
-      }
-
-      &:hover:not(.embedded) {
-        color: $accentblue;
-      }
+  &.toc-heading {
+    mat-icon.rotating-icon {
+      height: 18px;
+      width: 18px;
+      position: relative;
+      left: -4px;
+      top: 5px;
     }
 
-    &.toc-more-items {
-      color: $mediumgray;
-      top: 10px;
+    &:hover:not(.embedded) {
+      color: $accentblue;
+    }
+  }
+
+  &.toc-more-items {
+    color: $mediumgray;
+    top: 10px;
+    position: relative;
+
+    &:hover {
+      color: $accentblue;
+    }
+
+    &::after {
+      content: 'expand_less';
+    }
+
+    &.collapsed::after {
+      content: 'more_horiz';
+    }
+  }
+
+  .mat-icon {
+    &.collapsed {
+      @include rotate(0deg);
+    }
+
+    &:not(.collapsed) {
+      @include rotate(90deg);
+    }
+  }
+
+  ul.toc-list {
+    list-style-type: none;
+    margin: 0;
+    padding: 0 8px 0 0;
+    
+    @media (max-width: 800px) {
+      width: auto;
+    }
+
+    li {
+      box-sizing: border-box;
+      @include font-size(12);
+      @include line-height(16);
+      padding: 3px 0 3px 12px;
       position: relative;
+      transition: all 0.3s ease-in-out;
+
+      &.h1:after {
+        content: '';
+        display: block;
+        height: 1px;
+        width: 40%;
+        margin: 7px 0 4px 0;
+        background: $lightgray;
+        clear: both;
+      }
+
+      &.h3 {
+        padding-left: 24px;
+      }
+
+      a {
+        color: lighten($darkgray, 10);
+        overflow: visible;
+        @include font-size(12);
+        display: table-cell;
+      }
 
       &:hover {
-        color: $accentblue;
-      }
-
-      &::after {
-        content: 'expand_less';
-      }
-
-      &.collapsed::after {
-        content: 'more_horiz';
-      }
-    }
-
-    .mat-icon {
-      &.collapsed {
-        @include rotate(0deg);
-      }
-
-      &:not(.collapsed) {
-        @include rotate(90deg);
-      }
-    }
-
-    ul.toc-list {
-      list-style-type: none;
-      margin: 0;
-      padding: 0 8px 0 0;
-
-      @media (max-width: 800px) {
-        width: auto;
-      }
-
-      li {
-        box-sizing: border-box;
-        @include font-size(12);
-        @include line-height(16);
-        padding: 3px 0 3px 12px;
-        position: relative;
-        transition: all 0.3s ease-in-out;
-
-        &.h1:after {
-          content: '';
-          display: block;
-          height: 1px;
-          width: 40%;
-          margin: 7px 0 4px 0;
-          background: $lightgray;
-          clear: both;
+        * {
+          color: $accentblue;
         }
+      }
 
-        &.h3 {
-          padding-left: 24px;
-        }
+      &.active {
+        * {
+          color: $blue;
+          font-weight: 500;
 
-        a {
-          color: lighten($darkgray, 10);
-          overflow: visible;
-          @include font-size(12);
-          display: table-cell;
-        }
-
-        &:hover {
-          * {
-            color: $accentblue;
-          }
-        }
-
-        &.active {
-          * {
-            color: $blue;
-            font-weight: 500;
-
-            &:before {
-              content: '';
-              border-radius: 50%;
-              left: -3px;
-              top: 12px;
-              background: $blue;
-              position: absolute;
-              width: 6px;
-              height: 6px;
-            }
+          &:before {
+            content: '';
+            border-radius: 50%;
+            left: -3px;
+            top: 12px;
+            background: $blue;
+            position: absolute;
+            width: 6px;
+            height: 6px;
           }
         }
       }
+    }
 
-      &:not(.embedded) li {
-        &:before {
-          border-left: 1px solid $lightgray;
-          bottom: 0;
-          content: '';
-          left: 0;
-          position: absolute;
-          top: 0;
-        }
+    &:not(.embedded) li {
+      &:before {
+        border-left: 1px solid $lightgray;
+        bottom: 0;
+        content: '';
+        left: 0;
+        position: absolute;
+        top: 0;
+      }
 
-        &:first-child:before {
-          top: 13px;
-        }
+      &:first-child:before {
+        top: 13px;
+      }
 
-        &:last-child:before {
-          bottom: calc(100% - 14px);
-        }
+      &:last-child:before {
+        bottom: calc(100% - 14px);
+      }
 
-        &:not(.active):hover a:before {
-          content: '';
-          border-radius: 50%;
-          left: -3px;
-          top: 12px;
-          background: $lightgray;
-          position: absolute;
-          width: 6px;
-          height: 6px;
-        }
+      &:not(.active):hover a:before {
+        content: '';
+        border-radius: 50%;
+        left: -3px;
+        top: 12px;
+        background: $lightgray;
+        position: absolute;
+        width: 6px;
+        height: 6px;
       }
     }
   }