:root{--bg:#fbfbfd;--fg:#1d1d1f;--mute:#6e6e73;--card:#fff;--line:#d2d2d7;--blue:#0071e3;--blue2:#0077ed;--green:#1d9a4a;--red:#d70015}
@media (prefers-color-scheme:dark){:root{--bg:#000;--fg:#f5f5f7;--mute:#a1a1a6;--card:#1c1c1e;--line:#3a3a3c;--blue:#2997ff;--blue2:#409cff}}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font:17px/1.47 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
.wrap{max-width:560px;margin:0 auto;padding:48px 20px 64px;text-align:center}
.wide{max-width:720px;text-align:left}
.logo{width:72px;height:72px;margin:0 auto 20px;border-radius:18px;background:linear-gradient(145deg,#2b2b2e,#000);display:flex;align-items:center;justify-content:center;color:#fff;font-size:34px}
h1{font-size:32px;line-height:1.12;font-weight:700;letter-spacing:-.02em;margin:0 0 10px}
h2{font-size:21px;margin:32px 0 8px;letter-spacing:-.01em}
p{margin:0 0 14px}
.mute{color:var(--mute)}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;margin:22px 0;text-align:left}
.btn{display:block;width:100%;border:0;border-radius:14px;background:var(--blue);color:#fff;font:600 17px/1 inherit;font-family:inherit;padding:16px;margin-top:14px;cursor:pointer;text-align:center;text-decoration:none}
.btn:hover{background:var(--blue2)}
.btn[disabled]{opacity:.5;cursor:default}
.btn.ghost{background:transparent;color:var(--blue);font-weight:500}
input{width:100%;border:1px solid var(--line);border-radius:12px;padding:14px;font:600 20px/1 ui-monospace,Menlo,monospace;letter-spacing:.15em;text-align:center;text-transform:uppercase;background:var(--card);color:var(--fg)}
.row{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}
.row b{font-weight:600}
.ok{color:var(--green)}.err{color:var(--red)}
.tick{font-size:48px;margin-bottom:8px}
.hide{display:none!important}
.foot{margin-top:40px;font-size:13px;color:var(--mute)}
.foot a,a{color:var(--blue);text-decoration:none}
html[lang=ru] .en{display:none!important}
html[lang=en] .ru{display:none!important}
li{margin:4px 0}