:root{--bg:#f4f6fb;--card:#fff;--fg:#141a2a;--muted:#5d6782;--line:#dfe3ee;--accent:#2f5bea;--accent-fg:#fff;--err:#c4322b;--err-bg:#fdecea;--ok:#1f9d55;--field:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#0e1220;--card:#161b2c;--fg:#e8ebf4;--muted:#8d96b0;--line:#2a3148;--accent:#5b7ff5;--err:#ff8a80;--err-bg:#3a1d1f;--ok:#4cc38a;--field:#0f1424}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--fg);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
#app{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px}
.brand{display:flex;align-items:center;gap:10px;margin-bottom:24px;font-weight:600;font-size:20px;letter-spacing:-.01em}
.brand svg{width:36px;height:36px}
.card{width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px 28px 24px;box-shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06)}
h1{font-size:19px;margin:0 0 4px;font-weight:600}
.sub{color:var(--muted);margin:0 0 20px;font-size:14px}
label{display:block;font-size:13px;font-weight:500;margin:14px 0 6px}
input{width:100%;height:42px;padding:0 12px;border:1px solid var(--line);border-radius:9px;background:var(--field);color:var(--fg);font:inherit;outline:none;transition:border-color .15s,box-shadow .15s}
input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
input.code{text-transform:uppercase;letter-spacing:.12em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:13px}
.check{display:flex;align-items:center;gap:6px;color:var(--muted);margin:0;font-weight:400}
.check input{width:auto;height:auto}
a,.link{color:var(--accent);text-decoration:none;background:none;border:0;padding:0;font:inherit;cursor:pointer}
a:hover,.link:hover{text-decoration:underline}
button.primary{width:100%;height:42px;margin-top:20px;border:0;border-radius:9px;background:var(--accent);color:var(--accent-fg);font:inherit;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}
button.primary:disabled{opacity:.7;cursor:default}
.spin{width:16px;height:16px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:s .7s linear infinite}
@keyframes s{to{transform:rotate(360deg)}}
.alert{margin:16px 0 0;padding:10px 12px;border-radius:9px;background:var(--err-bg);color:var(--err);font-size:13.5px}
.alt{text-align:center;margin-top:18px;font-size:14px;color:var(--muted)}
.foot{margin-top:28px;font-size:12.5px;color:var(--muted);display:flex;gap:14px;align-items:center;flex-wrap:wrap;justify-content:center}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--muted);margin-right:6px;vertical-align:1px}
.dot.ok{background:var(--ok)}
.dot.bad{background:var(--err)}
.hint{color:var(--muted);font-size:13px;margin-top:10px}