diff --git a/src/style.css b/src/style.css
index 9603ec3..20d029c 100644
--- a/src/style.css
+++ b/src/style.css
@@ -47,3 +47,17 @@ kbd {
   padding: 0 4px;
   color: var(--text);
 }
+
+/* Thin dark scrollbars: a rounded thumb that brightens on hover, no arrows. */
+::-webkit-scrollbar { width: 10px; height: 10px; background: transparent; }
+::-webkit-scrollbar-track { background: transparent; }
+::-webkit-scrollbar-corner { background: transparent; }
+::-webkit-scrollbar-button { display: none; }
+::-webkit-scrollbar-thumb {
+  background: #2c3150;
+  border-radius: 999px;
+  border: 3px solid transparent;
+  background-clip: padding-box;
+}
+::-webkit-scrollbar-thumb:hover { background-color: #4a5280; }
+::-webkit-scrollbar-thumb:active { background-color: var(--accent); }