:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:#111;background:#fff}body{margin:0}code{background:#f6f6f6;padding:2px 6px;border-radius:6px}input,select,button{font:inherit;border-radius:8px;border:1px solid #ddd}button{cursor:pointer;background:#111;color:#fff;border:1px solid #111}button:disabled{opacity:.55;cursor:not-allowed}