:root{--bg:#fff;--fg:#111;--muted:#666;--border:#0000001f;--surface:#f5f5f5;--hover:#0000000a;--error:#c0392b;--danger:#c0392b}[data-theme=dark]{--bg:#111;--fg:#eee;--muted:#888;--border:#2a2a2a;--surface:#1a1a1a;--hover:#ffffff0f;--error:#e05252;--danger:#c0392b}*{box-sizing:border-box}html,body{height:100%}body{background:var(--bg);color:var(--fg);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Apple Color Emoji,Segoe UI Emoji}