diff --git a/ui/src/index.css b/ui/src/index.css
index 6a821296..eb14d22c 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -178,13 +178,19 @@
   background: oklch(0.5 0 0);
 }
 
-/* Auto-hide scrollbar: fully invisible by default, visible on container hover */
+/* Auto-hide scrollbar: completely hidden by default, visible on container hover */
+.scrollbar-auto-hide::-webkit-scrollbar {
+  width: 0 !important;
+  background: transparent !important;
+}
 .scrollbar-auto-hide::-webkit-scrollbar-track {
   background: transparent !important;
 }
 .scrollbar-auto-hide::-webkit-scrollbar-thumb {
   background: transparent !important;
-  transition: background 150ms ease;
+}
+.scrollbar-auto-hide:hover::-webkit-scrollbar {
+  width: 8px !important;
 }
 .scrollbar-auto-hide:hover::-webkit-scrollbar-track {
   background: oklch(0.205 0 0) !important;