[data-theme="dark"], .theme-dark {
  --color-bg: #121212;
  --color-surface: #1e1e1e;
  --color-text: #e9ecef;
  --color-border: #333;
}
body.theme-dark, [data-theme="dark"] body { background: var(--color-bg); color: var(--color-text); }
.theme-dark .card, [data-theme="dark"] .card { background: var(--color-surface); border-color: var(--color-border); }
.theme-dark .admin-sidebar { background: #0d1117 !important; }