*{box-sizing:border-box}body{color:#1a1a1a;background:#fff;margin:0;font:15px/1.5 system-ui,Segoe UI,Roboto,sans-serif}button{cursor:pointer;font:inherit;background:#fff;border:1px solid #ccc;border-radius:4px;padding:6px 12px}button:disabled{cursor:not-allowed;opacity:.6}a{color:#2563eb}