:root {
--bg: #f9fafb; /* gray-50 */
--panel: #ffffff; /* white */
--card: #ffffff; /* white card */
--ink: #111827; /* gray-900 */
--muted: #6b7280; /* gray-500 */
--border: #e5e7eb; /* gray-200 */
--hover: #f3f4f6; /* gray-100 */
--brand: #2563eb; /* blue-600 */
--brand-ink: #ffffff;
--ring: rgba(37,99,235,.25);
}