diff --git a/sass/index.scss b/sass/index.scss
index d269ebb..5f7c8e5 100644
--- a/sass/index.scss
+++ b/sass/index.scss
@@ -67,7 +67,8 @@ body {
     flex-wrap: nowrap;
     justify-content: flex-start;
     align-items: center;
-    padding-top: calc(0.5 * var(--space-3xs));
+    padding-top: 0;
+    max-height: var(--header-size);
     padding-bottom: calc(0.5 * var(--space-3xs));
     background-color: var(--background-color);
     opacity: 0.95;
@@ -153,21 +154,21 @@ body {
 
 @mixin toc-sticky {
     max-width: 100%;
-    top: var(--header-size);
     height: calc(100vh - var(--header-size));
     position: sticky;
     z-index: 900;
+    overflow-y: scroll;
     scrollbar-width: thin;
     scrollbar-color: #fff #fff;
 
     &:hover {
-        scrollbar-color: #e9ecef #fff;
+        scrollbar-color: var(--border-color) #fff;
     }
 
     .scrollable-sidebar {
+        scrollbar-width: thin;
         display: block;
         width: auto;
-        overflow-y: auto;
         padding-bottom: 4rem;
 
         ul {