diff --git a/admin/index.html b/admin/index.html
index 92e2f65..bba06f0 100644
--- a/admin/index.html
+++ b/admin/index.html
@@ -22,6 +22,13 @@
     ═══════════════════════════════════════════════════════════ */
     
     @media (max-width: 768px) {
+      /* Sidebar - HIDDEN by default on mobile */
+      aside,
+      [class*="Sidebar"],
+      nav[class*="Sidebar"] {
+        display: none !important;
+      }
+      
       /* Main content takes full width */
       main,
       [class*="MainContent"],