:root{--bg:#f6f5f2;--card:#fff;--ink:#1d2327;--muted:#6b7378;--line:#e6e3dd;--brand:#0f6e6a;--bad:#b4473a}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#14181a;--card:#1c2124;--ink:#e8ecee;--muted:#9aa3a8;--line:#2c3338;--brand:#4fb3ad;--bad:#e2806f}}
:root[data-theme="dark"]{--bg:#14181a;--card:#1c2124;--ink:#e8ecee;--muted:#9aa3a8;--line:#2c3338;--brand:#4fb3ad;--bad:#e2806f}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 Inter,system-ui,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;width:100%;max-width:400px}
.logo{font-weight:700;font-size:18px;margin-bottom:2px}.logo span{color:var(--brand);font-weight:600}
h1{font-size:20px;margin:18px 0 6px}p{color:var(--muted);margin:0 0 16px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
input{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin-bottom:14px}
input.code{font-size:24px;letter-spacing:8px;text-align:center}
button{width:100%;font:inherit;font-weight:600;background:var(--brand);color:#fff;border:none;border-radius:8px;padding:11px;cursor:pointer}
button.link{background:none;color:var(--brand);width:auto;padding:0;font-weight:500}
.err{color:var(--bad);font-size:14px;min-height:20px;margin-bottom:8px}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:14px}
select{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:4px 6px}
.hidden{display:none}
.mark{display:block;margin:0 auto 14px;width:120px;height:120px}.logo{text-align:center}.themebtn{font-size:18px;line-height:1}