:root{color-scheme:light;--canvas:#f7f6f1;--surface:#fff;--ink:#202019;--muted:#77766d;--line:#e5e2d7;--accent:#fcc608;--danger:#aa3b32}
*{box-sizing:border-box}
body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(ellipse at 50% 20%,#fffdf4 0,var(--canvas) 58%);color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.auth-shell{display:grid;min-height:100vh;place-items:center;padding:24px}
.auth-card{width:min(100%,420px);padding:38px;border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 22px 70px #302b1412}
.auth-logo{width:42px;height:32px;object-fit:contain;color:var(--ink)}
.auth-eyebrow{margin:20px 0 5px;color:#967500;font-size:12px;font-weight:700;letter-spacing:2px}
h1{margin:0;font-size:26px;letter-spacing:-.6px}
.auth-description{margin:8px 0 24px;color:var(--muted);font-size:14px}
form{display:grid;gap:9px}
label{margin-top:4px;font-size:13px;font-weight:650}
input{width:100%;height:46px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font:inherit;font-size:15px;outline:none}
input:focus{border-color:#c49c08;box-shadow:0 0 0 3px #fcc6082d}
input[readonly]{background:#f7f6f1;color:#77766d}
#confirm-field[hidden]{display:none}
#confirm-field small{display:block;margin-top:3px;color:var(--muted);font-size:12px}
button{height:46px;margin-top:13px;border:0;border-radius:8px;background:var(--accent);color:#302705;font:inherit;font-weight:700;cursor:pointer;transition:filter .16s,transform .16s}
button:hover{filter:brightness(.96);transform:translateY(-1px)}
button:disabled{cursor:wait;opacity:.65;transform:none}
.auth-error{margin:4px 0 0;color:var(--danger);font-size:13px}
.auth-footnote{margin:22px 0 0;color:var(--muted);font-size:12px;line-height:1.7}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--canvas:#151612;--surface:#1d1e1a;--ink:#f2f0e6;--muted:#aaa899;--line:#34352d;--danger:#ff9386}body{background:radial-gradient(ellipse at 50% 20%,#25251e 0,var(--canvas) 60%)}.auth-card{box-shadow:0 22px 70px #0005}.auth-logo{color:#fff}input{background:#20211c}input[readonly]{background:#24251f;color:#aaa899}}
@media(max-width:480px){.auth-shell{padding:16px}.auth-card{padding:28px 22px;border-radius:14px}}
@media(max-width:1100px){input{font-size:16px}}