Fix nav colors

includes/admin/admin-frontend/styles.css

@@ -953,8 +953,8 @@ button.hover\:bg-yellow-600:hover {
   transform: translateY(-2px);
 }
 
-/* Navigation buttons */
-nav button {
+/* Navigation buttons (exclude admin sidebar + subtabs) */
+nav button:not(.admin-nav-link):not(.admin-subtab-btn) {
   background: rgba(99, 102, 241, 0.2) !important;
   backdrop-filter: blur(20px) saturate(180%);
   -webkit-backdrop-filter: blur(20px) saturate(180%);
@@ -963,7 +963,7 @@ nav button {
   box-shadow: 0 2px 4px rgba(99, 102, 241, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.1);
 }
 
-nav button:hover {
+nav button:not(.admin-nav-link):not(.admin-subtab-btn):hover {
   background: rgba(99, 102, 241, 0.4) !important;
   border-color: rgba(99, 102, 241, 0.6);
   box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.2);
@@ -1547,7 +1547,10 @@ dialog > .dialog-notifications > * {
   border: none;
   border-left: 2px solid transparent;
   border-radius: 0;
-  background: transparent;
+  background: transparent !important;
+  backdrop-filter: none !important;
+  -webkit-backdrop-filter: none !important;
+  box-shadow: none !important;
   color: var(--admin-sidebar-fg-muted);
   font-size: 0.875rem;
   font-weight: 400;
@@ -1561,8 +1564,9 @@ dialog > .dialog-notifications > * {
 }
 
 .admin-nav-link:hover {
-  background: rgba(255, 255, 255, 0.04);
+  background: rgba(255, 255, 255, 0.04) !important;
   color: var(--admin-sidebar-fg);
+  transform: none;
 }
 
 .admin-nav-link:focus {
@@ -1570,20 +1574,20 @@ dialog > .dialog-notifications > * {
 }
 
 .admin-nav-link:focus-visible {
-  background: rgba(255, 255, 255, 0.06);
+  background: rgba(255, 255, 255, 0.06) !important;
   color: var(--admin-sidebar-fg);
   box-shadow: inset 0 0 0 1px var(--admin-border-strong);
 }
 
 .admin-nav-link--active {
-  background: rgba(255, 255, 255, 0.06);
-  border-left-color: var(--admin-brand);
+  background: var(--admin-bg-subtle) !important;
+  border-left-color: var(--admin-fg-muted) !important;
   color: var(--admin-sidebar-fg);
   font-weight: 500;
 }
 
 .admin-nav-link--active:hover {
-  background: rgba(255, 255, 255, 0.08);
+  background: var(--admin-bg-elevated) !important;
 }
 
 .admin-nav-icon {