:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.6}main{max-width:480px;margin:0 auto;padding:48px 24px}h1{font-size:1.5rem}label{margin-bottom:8px;font-weight:600;display:block}input,button{border-radius:8px;padding:10px 12px;font-size:16px}input{border:1px solid #ccc;width:100%}button{color:#fff;cursor:pointer;background:#111;border:none;margin-top:12px}button:disabled{opacity:.5;cursor:default}a{color:#06c}.note{color:#666;font-size:.9rem}.error{color:#c00}