:root{--bg:#f5f6f8;--card:#fff;--text:#1c1f23;--muted:#6b7280;--border:#e3e6ea;--accent:#2563eb;--danger:#dc2626}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button{font:inherit;cursor:pointer}input{font:inherit}