diff --git a/common-theme/assets/styles/04-components/toc.scss b/common-theme/assets/styles/04-components/toc.scss
index 3857a6e1c..d070fcf4e 100644
--- a/common-theme/assets/styles/04-components/toc.scss
+++ b/common-theme/assets/styles/04-components/toc.scss
@@ -9,6 +9,18 @@
     var(--theme-spacing--4);
   overflow-y: auto;
   counter-reset: item;
+  // Gradient fade at bottom to indicate scrollable content (closes #1799)
+  &::after {
+    content: "";
+    position: sticky;
+    bottom: 0;
+    display: block;
+    height: 2em;
+    margin-top: -2em;
+    background: linear-gradient(transparent, var(--theme-color--paper));
+    pointer-events: none;
+    flex-shrink: 0;
+  }
 
   ol {
     color: var(--theme-color--ink);