style: apply navy background to entire sidebar panel with card body and header overrides

src/TaxBaik.Web/wwwroot/css/admin.css

@@ -1852,22 +1852,46 @@ textarea:focus-visible {
    Tabler Navbar Vertical (Admin Sidebar)
    ============================================================================ */
 
-.admin-sidebar-card {
+aside {
-  border-radius: var(--radius-xl);
+  background: #1A2F4A !important;
-  overflow: hidden;
+  padding: var(--space-2) !important;
-  box-shadow: var(--shadow-sm);
+  border-radius: var(--radius-md);
-  background: #1A2F4A;
 }
 
-.admin-sidebar-header {
+.admin-sidebar-card {
-  background: #1A2F4A;
+  border-radius: var(--radius-md);
-  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+  overflow: hidden;
-  padding: var(--space-3) var(--space-4);
+  box-shadow: none;
+  background: #1A2F4A !important;
+  border: none !important;
+}
+
+.admin-sidebar-card .card-header {
+  background: #1A2F4A !important;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
+  padding: var(--space-3) var(--space-4) !important;
+}
+
+.admin-sidebar-card .card-title {
+  color: #FFFFFF !important;
+  font-size: var(--font-size-base);
+  font-weight: var(--font-weight-semibold);
+  margin: 0;
 }
 
 .admin-sidebar-body {
-  background: #1A2F4A;
+  background: #1A2F4A !important;
-  padding: 0;
+  padding: 0 !important;
+}
+
+.admin-sidebar-card .card-body {
+  background: #1A2F4A !important;
+  padding: 0 !important;
+}
+
+.admin-sidebar-card .accordion-item {
+  background: transparent !important;
+  border: none !important;
 }
 
 .admin-sidebar-card .accordion-button {