*{box-sizing:border-box}
:root{--bg:#0f1115;--surface:#191d24;--surface-2:#20252d;--border:#353d49;--text:#f7f8fa;--muted:#aab3c0;--brand:#ffd000;--danger:#f87171;--success:#4ade80}
html{min-height:100%;background:var(--bg);color-scheme:dark}
body{min-height:100vh;margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--text);background:radial-gradient(circle at 50% 15%,rgba(255,208,0,.09),transparent 32rem),var(--bg)}
button,input{font:inherit}
[hidden]{display:none!important}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:32px 20px}
.auth-card{width:min(100%,430px);padding:38px;border:1px solid var(--border);border-radius:18px;background:rgba(25,29,36,.96);box-shadow:0 26px 80px rgba(0,0,0,.4)}
.brand-mark{width:48px;height:48px;display:grid;place-items:center;margin-bottom:20px;border-radius:13px;background:var(--brand);color:#0b0d10;font-size:23px;font-weight:900}
.eyebrow{margin:0 0 8px;color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.12em}
h1{margin:0;font-size:25px;line-height:1.25}
.intro{margin:10px 0 0;color:var(--muted);font-size:14px}
.status{min-height:24px;margin:18px 0 4px;color:var(--muted);font-size:14px}
.status[data-tone="error"]{color:var(--danger)}
.status[data-tone="success"]{color:var(--success)}
.auth-form{display:grid;gap:16px;margin-top:18px}
.field{display:grid;gap:7px}
label{color:var(--text);font-size:13px;font-weight:650}
input{width:100%;min-height:46px;padding:10px 12px;border:1px solid var(--border);border-radius:9px;background:var(--surface-2);color:var(--text)}
input:hover{border-color:#505b69}
button{min-height:46px;padding:10px 16px;border:1px solid var(--brand);border-radius:9px;background:var(--brand);color:#0b0d10;font-weight:750;cursor:pointer}
button:hover:not(:disabled){background:#ffe04d}
button:disabled{opacity:.55;cursor:wait}
input:focus-visible,button:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.first-login-note{padding:14px;border:1px solid rgba(255,208,0,.25);border-radius:10px;background:rgba(255,208,0,.07)}
.first-login-note h2{margin:0;font-size:16px}
.first-login-note p,.hint{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.55}
.filing-footer{position:fixed;right:16px;bottom:10px;font-size:12px;z-index:2}.filing-footer a{color:var(--muted);text-decoration:none}.filing-footer a:hover{color:var(--text);text-decoration:underline}
@media (max-width:520px){.auth-shell{padding:0}.auth-card{min-height:100vh;padding:32px 22px;border:0;border-radius:0;display:flex;flex-direction:column;justify-content:center}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}