:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}body{margin:0;background:#fafafa}input,button{font:inherit}button{cursor:pointer}.card{background:#fff;border:1px solid #ddd;border-radius:12px;padding:12px}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace}