diff --git a/docs/source/_static/theme-override.css b/docs/source/_static/theme-override.css
index 6124a64e53..deb8d3d0a8 100644
--- a/docs/source/_static/theme-override.css
+++ b/docs/source/_static/theme-override.css
@@ -58,3 +58,18 @@ tbody tr:hover {
         max-width: 2000px !important;
     }
 }
+
+/* Less intrusive scrollbar in left section TOC */
+#left-sidebar::-webkit-scrollbar {
+    width: 6px;
+    border-radius: 0;
+}
+
+#left-sidebar::-webkit-scrollbar-thumb {
+    background-color: hsl(var(--border));;
+    border-radius: 0;
+}
+
+#left-sidebar::-webkit-scrollbar-thumb:hover {
+    background-color: hsl(var(--muted));;
+}