:root{color-scheme:dark;font-family:system-ui,sans-serif;background:#020617;color:#f8fafc}
*{box-sizing:border-box}body{margin:0;padding:24px 16px}main{max-width:680px;margin:auto}
h1{font-size:clamp(26px,5vw,36px);margin:8px 0}h2{font-size:21px}p{line-height:1.6;color:#b6c4d8}
.brand{color:#38bdf8;letter-spacing:2px;font-weight:800;font-size:13px}section{background:#0b1425;border:1px solid #263b56;border-radius:16px;padding:24px;margin:20px 0}
nav,.heading{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between}
nav button{flex:1;min-width:130px}label{display:block;margin:20px 0 8px;line-height:1.5}
input{width:100%;padding:14px;background:#020617;border:1px solid #607590;border-radius:8px;color:inherit;font:inherit}
button{cursor:pointer;border:1px solid #38bdf8;border-radius:8px;background:#102b45;color:#fff;padding:12px 16px;font:600 15px system-ui}
form>button{margin-top:22px;background:#1d4ed8;width:100%}button:disabled{opacity:.55;cursor:wait}
:focus-visible{outline:3px solid #facc15;outline-offset:4px}.check{display:flex;gap:12px;align-items:flex-start}.check input{width:22px;height:22px;flex-shrink:0}
#code{font:700 30px ui-monospace,monospace;letter-spacing:8px}#message:empty{display:none}#message{padding:14px;border:1px solid #38bdf8;border-radius:8px;color:#e0f2fe}
ul{list-style:none;padding:0}li{padding:16px 0;border-top:1px solid #263b56;display:flex;gap:12px;align-items:center;justify-content:space-between}li small{display:block;color:#b6c4d8;margin-top:5px}footer{text-align:center;color:#b6c4d8;font-size:12px;margin:28px 0}[hidden]{display:none!important}