:root{--bg:#f3f5f9;--card:#fff;--ink:#0f172a;--muted:#5b6475;--line:#dde2ea;--accent:#2457d6;--accent-ink:#fff;--bad-bg:#fdecec;--bad:#9b1c1c;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#0b1020;--card:#121a2e;--ink:#e6eaf2;--muted:#9aa4b8;--line:#25304a;--accent:#6b93ff;--accent-ink:#0b1020;--bad-bg:#3a1418;--bad:#ffb4b4;color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;display:flex;min-height:100vh}
.shell{margin:auto;width:100%;max-width:400px;padding:24px 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px 24px;box-shadow:0 8px 30px rgba(15,23,42,.06)}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;font-size:14px;color:var(--muted);margin-bottom:18px}
.mark{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,var(--accent),#14b8a6)}
h1{font-size:22px;margin:0 0 4px;letter-spacing:-.01em}
.lede{margin:0 0 18px;color:var(--muted);font-size:14px}
form{display:grid;gap:14px}
label{display:grid;gap:6px;font-size:13px;font-weight:550}
input{font:inherit;width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink)}
input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
button{font:inherit;font-weight:600;padding:11px 14px;border:0;border-radius:9px;background:var(--accent);color:var(--accent-ink);cursor:pointer;margin-top:4px}
button:hover{filter:brightness(1.07)}
.alert{background:var(--bad-bg);color:var(--bad);border-radius:9px;padding:10px 12px;font-size:14px;margin:0 0 14px}
.aside{margin:16px 0 0;font-size:13px}
a{color:var(--accent)}
.foot{color:var(--muted);font-size:12px;text-align:center;margin-top:16px}
.steps{margin:0 0 16px;padding-left:20px;font-size:14px;display:grid;gap:10px}
.qr{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px;display:inline-block;margin:10px 0 6px}
.qr svg{display:block;width:184px;height:184px}
details{font-size:13px;color:var(--muted)}
summary{cursor:pointer}
.key{font:13px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.06em;color:var(--ink);background:var(--bg);border:1px dashed var(--line);border-radius:8px;padding:8px 10px;margin:6px 0 0;word-break:break-all}
.shell.wide{max-width:560px}
.brand .logo{width:24px;height:24px;object-fit:contain;border-radius:5px}
.button{display:block;text-align:center;font-weight:600;padding:12px 14px;border-radius:9px;background:var(--accent);color:var(--accent-ink);text-decoration:none;margin:4px 0 18px}
.button:hover{filter:brightness(1.07)}
.info{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:13px;color:var(--muted)}
.info p{margin:0 0 6px}.info p:last-child{margin:0}.info strong{color:var(--ink)}
.checks{list-style:none;padding:0;margin:14px 0 16px;display:grid;gap:8px;font-size:14px}
.checks li{display:flex;align-items:center;gap:10px}
.checks li::before{content:"";width:18px;height:18px;border-radius:50%;flex:none;background:var(--line)}
.checks li.done::before{content:"\2713";display:grid;place-items:center;color:#fff;font-size:12px;background:#16a34a}
.checks li.wait::before{border:2px solid #f59e0b;background:transparent;width:14px;height:14px}