:root{--navy:#1A4080;--ink:#122036;--muted:#5A6780;--line:#D6DCE7;--bg:#E9EDF4;--orange:#E5730F;--ok:#1E8A4C;--ko:#C23B2E;--warn:#B76E00}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:var(--bg);color:var(--ink);font:16px/1.5 "IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif}
.card{width:100%;max-width:440px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 24px;box-shadow:0 4px 18px -8px rgba(18,32,54,.25)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--navy);margin-bottom:18px}
.mark{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--navy);color:#fff;font-size:14px;border-bottom:3px solid var(--orange)}
h1{font-size:22px;margin:0 0 10px;line-height:1.25}
p{color:var(--muted);margin:0 0 14px}
label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
input{width:100%;padding:12px 14px;border:1px solid #B7C1D3;border-radius:10px;font:inherit;color:var(--ink);background:#fff}
input:focus{outline:2px solid var(--navy);outline-offset:1px}
.code{font-family:"IBM Plex Mono",ui-monospace,monospace;letter-spacing:.3em;font-size:20px;text-align:center}
button{width:100%;margin-top:20px;min-height:48px;border:0;border-radius:10px;background:var(--navy);color:#fff;font:inherit;font-weight:700;font-size:16px;cursor:pointer}
button:disabled{opacity:.6;cursor:wait}
.err{color:var(--ko);font-size:14px;margin-top:12px;min-height:1em}
.qr{display:flex;justify-content:center;margin:12px 0}.qr svg{width:200px;height:200px}
.secret{font-family:"IBM Plex Mono",monospace;font-size:13px;word-break:break-all;background:#F4F6FA;padding:8px 10px;border-radius:8px;color:var(--ink)}
ol{padding-left:20px;color:var(--muted);margin:0 0 6px}ol li{margin:4px 0}
.badge{display:inline-block;padding:6px 12px;border-radius:99px;font-weight:700;font-size:14px;margin-bottom:14px}
.badge.ok{background:#E2F3E9;color:var(--ok)}.badge.ko{background:#F8E3E0;color:var(--ko)}.badge.warn{background:#FBEFDC;color:var(--warn)}
dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:14px 0}dt{color:var(--muted)}dd{margin:0;font-weight:600}
.hint{font-size:14px}.foot{font-size:12px;color:#8A95AA;margin:18px 0 0;text-align:center}
@media (prefers-color-scheme:dark){:root{--ink:#E6EBF3;--muted:#A3AEC2;--line:#2C3A52;--bg:#0E1626}.card,input{background:#152036}.secret{background:#0E1626}input{border-color:#3A4A66}}