*{box-sizing:border-box}body{margin:0;font:16px/1.4 -apple-system,system-ui,sans-serif;color:#121212;background:#fff}
main{max-width:420px;margin:0 auto;padding:48px 20px}.mark{font-weight:700;font-size:22px}h1{font-size:30px;margin:8px 0 12px}
p{color:#595959}.muted{color:#737373;font-size:13px}.err{color:#b3261e;font-weight:600}
input{width:100%;font:600 22px ui-monospace,monospace;letter-spacing:4px;text-transform:uppercase;padding:14px;border:1px solid #121212;border-radius:10px}
button{width:100%;margin-top:12px;padding:16px;border:0;border-radius:999px;background:#121212;color:#fff;font:600 17px system-ui}
.card{border:1px solid #e0e0e0;border-radius:14px;padding:18px;margin:12px 0}.card a{color:#121212;font-weight:600;text-decoration:none;display:block}
.err:empty{display:none}.row{display:flex;gap:8px}.row input{flex:1;min-width:0}
.scan{flex:none;width:58px;margin:0;padding:0;border-radius:10px;display:grid;place-items:center}
.box video{display:block;width:100%;aspect-ratio:1;object-fit:cover;margin-top:12px;border-radius:14px;background:#121212}
.ghost{background:#fff;color:#121212;border:1px solid #121212}