diff --git a/internal/gateway/ui/index.html b/internal/gateway/ui/index.html
index 6499176..156fd51 100644
--- a/internal/gateway/ui/index.html
+++ b/internal/gateway/ui/index.html
@@ -459,10 +459,11 @@ td.t-tag{white-space:nowrap}
 /* ---- responsive: collapsible sidebar (NapCat-like) ---- */
 @media (max-width:900px){
   .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:50;transform:translateX(-100%);transition:transform .3s var(--ease-spring)}
-  .sidebar.open{transform:none;box-shadow:var(--sh-lg);z-index:50}
+  .sidebar.open{transform:none;box-shadow:var(--sh-lg);z-index:55}
+  .sidebar{backdrop-filter:none;-webkit-backdrop-filter:none}
   .main{width:100%}
   .sb-ham{display:flex}
-  .sb-backdrop{position:fixed;inset:0;background:rgba(20,12,40,.35);z-index:51;backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .2s}
+  .sb-backdrop{position:fixed;inset:0;background:rgba(20,12,40,.35);z-index:54;backdrop-filter:blur(4px);opacity:0;pointer-events:none;transition:opacity .2s}
   .sidebar.open + .sb-backdrop{opacity:1;pointer-events:auto}
   main#main{padding:8px 14px 32px}
   .breadcrumb{padding:12px 16px 6px}