body{font-family:system-ui,sans-serif;max-width:600px;margin:0 auto;padding:1rem}textarea{width:100%;font-family:monospace;font-size:.875rem}input[type=url]{width:100%;padding:.25rem;margin-bottom:.5rem;box-sizing:border-box}button{margin-right:.5rem;padding:.5rem 1rem}