body{font-family:system-ui,sans-serif;max-width:640px;margin:auto;padding:24px;line-height:1.5;color:#1d2433}a{color:#0f5a8a}input,button{font:inherit;padding:10px;margin:6px 0;width:100%;box-sizing:border-box}button{background:#0f5a8a;color:#fff;border:0;border-radius:6px}