:root{--brand:#1e293b;--accent:#3b82f6;--bg:#f1f5f9;--card:#fff;--border:#e2e8f0;--text:#0f172a;--muted:#64748b;--danger:#dc2626;--ok:#16a34a;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}input,select,button{font:inherit}button{cursor:pointer}