:root{color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:#0E0E12;color:#E8E8EC;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex;align-items:center;justify-content:center;padding:16px}
.card{width:100%;max-width:420px;background:#17171D;border-radius:18px;padding:26px}
.brand{color:#E5242B;font-weight:800;font-size:22px;letter-spacing:.5px;margin-bottom:18px}
h1{font-size:20px;margin:0 0 10px;color:#fff}
p{font-size:15px;line-height:1.5;margin:0 0 14px;color:#C9C9D1}
label{display:block;font-size:13px;color:#9A9AA5;margin:14px 0 6px}
input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid #2C2C36;background:#0E0E12;color:#fff;font-size:16px}
input:focus{outline:2px solid #E5242B;border-color:transparent}
button{width:100%;margin-top:20px;padding:13px;border:0;border-radius:10px;background:#E5242B;color:#fff;font-size:16px;font-weight:600;cursor:pointer}
button:disabled{opacity:.6;cursor:default}
.msg{margin-top:16px;font-size:14px;line-height:1.5}
.err{color:#FF8A8A}.ok{color:#7EE2A8}
.hint{font-size:13px;color:#9A9AA5;margin:6px 0 0}
.hidden{display:none}

.tabs{display:flex;gap:8px;margin:6px 0 4px}
.tab{flex:1;margin:0;padding:10px;background:#0E0E12;border:1px solid #2C2C36;color:#C9C9D1;font-size:14px}
.tab.on{background:#2A1416;border-color:#E5242B;color:#fff}
#code{font-size:24px;letter-spacing:6px;text-transform:uppercase;text-align:center;font-weight:700}
.small{font-size:13px;color:#9A9AA5;margin-top:14px}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:14px;font-size:14px;color:#C9C9D1}
.check input{width:auto;margin-top:3px}
.check.hidden{display:none}
a{color:#FF6B70}
.eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#9A9AA5;margin:18px 0 4px}
.device{border:1px solid #2C2C36;border-radius:12px;padding:4px 14px 14px;margin-top:10px}
.device-line{font-size:18px;font-weight:700;color:#fff;margin:0 0 4px}
button.link{background:none;color:#9A9AA5;font-weight:500;margin-top:8px;padding:8px}