:root{font-family:system-ui,-apple-system,"Noto Sans JP",sans-serif;color:#172033;background:#eef3f8}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px}.card{width:min(560px,100%);background:#fff;padding:32px;border-radius:16px;box-shadow:0 12px 32px #17324d22}label{display:grid;gap:6px;margin:14px 0}input,button{font:inherit;padding:12px}button{width:100%;background:#0b63ce;color:white;border:0;border-radius:8px}nav{display:grid;gap:12px;margin-top:20px}