:root{--bg:#f4f6fb;--card:#fff;--fg:#111827;--muted:#5b6475;--line:#d9deea;--accent:#1f4fd8;--accent-fg:#fff;--err:#b42318;--focus:#93b4ff;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
@media (prefers-color-scheme:dark){:root{--bg:#0d1117;--card:#161b22;--fg:#e6edf3;--muted:#9aa4b2;--line:#30363d;--accent:#4c7dff;--err:#ff8a80;--focus:#4c7dff}}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg)}
body{min-height:100vh;display:flex}
.wrap{margin:auto;width:100%;max-width:420px;padding:24px 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 24px;box-shadow:0 8px 24px rgba(0,0,0,.06)}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;font-size:1.1rem;margin-bottom:18px}
h1{font-size:1.45rem;margin:0 0 6px}
.sub{color:var(--muted);margin:0 0 18px;line-height:1.45}
label{display:block;font-weight:550;margin:14px 0 6px}
input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:transparent;color:inherit;font-size:1rem}
input.code{font-size:1.6rem;letter-spacing:.4em;text-align:center;font-variant-numeric:tabular-nums}
.btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;margin-top:14px;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:transparent;color:inherit;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
.btn:hover{filter:brightness(1.05)}
.btn[aria-busy=true]{opacity:.7;cursor:progress}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);margin:18px 0 4px;font-size:.9rem}
.or:before,.or:after{content:"";flex:1;border-top:1px solid var(--line)}
details.email{margin-top:20px;border-top:1px solid var(--line);padding-top:14px}
summary{cursor:pointer;color:var(--accent);font-weight:550}
.hint,.small,.muted{color:var(--muted);font-size:.9rem}
.status{min-height:1.2em;margin:4px 0}
.err{color:var(--err)}
.foot{color:var(--muted);font-size:.8rem;text-align:center;margin-top:16px;line-height:1.4}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--card);padding:8px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.codes{columns:2;padding-left:1.4em;font-size:1.05rem;line-height:1.9}
.codes code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.05em}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:.25rem 1rem;margin:.75rem 0}.kv dt{font-weight:600}.kv dd{margin:0;word-break:break-all}
.list{list-style:none;padding:0}.list li{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;margin:.4rem 0}.inline{display:inline;margin:0}
h2{font-size:1.05rem;margin:1.25rem 0 .4rem}