diff --git a/ui/src/index.css b/ui/src/index.css
index 7b0eee34..3ba08932 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -178,10 +178,16 @@
   background: oklch(0.5 0 0);
 }
 
-/* Auto-hide scrollbar: transparent by default, visible on container hover */
+/* Auto-hide scrollbar: fully transparent by default, visible on container hover */
+.scrollbar-auto-hide::-webkit-scrollbar-track {
+  background: transparent !important;
+}
 .scrollbar-auto-hide::-webkit-scrollbar-thumb {
   background: transparent !important;
 }
+.scrollbar-auto-hide:hover::-webkit-scrollbar-track {
+  background: oklch(0.205 0 0) !important;
+}
 .scrollbar-auto-hide:hover::-webkit-scrollbar-thumb {
   background: oklch(0.4 0 0) !important;
 }