:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#1a1a1a;background:#fff}*{box-sizing:border-box}body{margin:0}input{padding:8px;font:inherit;border:1px solid #ccc;border-radius:6px}button{padding:8px 14px;font:inherit;border:1px solid #bbb;border-radius:6px;background:#fafafa;cursor:pointer}button:disabled{opacity:.6;cursor:default}