@font-face {
    font-family: "Anthropic Sans";
    src: url("https://cdn.prod.website-files.com/67ce28cfec624e2b733f8a52/69971a00a3295036497e1a28_AnthropicSans-Roman-Web.woff2") format("woff2");
    font-style: normal;
    font-weight: 300 800;
    font-display: swap;
}
@font-face {
    font-family: "Anthropic Serif";
    src: url("https://cdn.prod.website-files.com/67ce28cfec624e2b733f8a52/69971a1551eb6cda0d656e8a_AnthropicSerif-Roman-Web.woff2") format("woff2");
    font-style: normal;
    font-weight: 300 800;
    font-display: swap;
}
:root {
    --login-ink: #141413;
    --login-muted: #5e5d59;
    --login-primary: #141413;
    --login-canvas: #f0eee6;
    --login-surface: #faf9f5;
    --login-accent: #d97757;
    --login-line: rgba(20, 20, 19, .16);
    --font-sans: "Anthropic Sans", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    --font-serif: "Anthropic Serif", "Songti SC", "STSong", Georgia, serif;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
    margin: 0;
    color: var(--login-ink);
    font-family: var(--font-sans);
    background: var(--login-canvas);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
.login-shell { min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 40px 20px 24px; }
.login-story { text-align: center; margin-bottom: 26px; }
.login-copy span { color: var(--login-accent); font-size: 11px; font-weight: 600; letter-spacing: .15em; }
.login-copy h1 { margin: 12px 0 0; font-size: clamp(23px, 4vw, 30px); font-weight: 500; }
.login-panel-wrap { width: min(460px, 100%); padding: clamp(24px, 5vw, 40px); border: 1px solid var(--login-line); border-radius: 20px; background: var(--login-surface); box-shadow: 0 16px 48px rgba(20, 20, 19, .05); }
.login-panel { width: 100%; margin: 0 auto; }
.login-panel h2 { margin: 0; text-align: center; font-size: 26px; font-weight: 500; }
.login-panel > p { margin: 10px 0 28px; text-align: center; color: var(--login-muted); font-size: 14px; }
.login-field { margin-bottom: 20px; }
.login-field label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 600; }
.login-field input { width: 100%; height: 50px; padding: 0 15px; border: 1px solid var(--login-line); border-radius: 12px; outline: none; background: var(--login-surface); color: var(--login-ink); font: inherit; transition: border-color .2s, box-shadow .2s; }
.login-field input:focus { border-color: var(--login-primary); box-shadow: 0 0 0 4px rgba(20, 20, 19, .07); }
.login-field input:disabled { opacity: .65; }
.login-submit { width: 100%; height: 50px; display: flex; align-items: center; justify-content: center; gap: 10px; border: 0; border-radius: 12px; color: var(--login-surface); background: var(--login-primary); font: inherit; font-weight: 600; cursor: pointer; transition: background .2s, transform .2s; }
.login-submit:hover:not(:disabled) { background: #3d3d3a; transform: translateY(-1px); }
.login-submit:active:not(:disabled) { transform: translateY(0); }
.login-submit:disabled { cursor: wait; opacity: .8; }
.login-feedback { min-height: 112px; padding-top: 16px; }
.login-error { margin: 0; padding: 12px 14px; border-radius: 12px; color: #8e3f31; background: #f2dfdb; font-size: 13px; line-height: 1.6; }
.login-footer { margin-top: 26px; color: var(--login-muted); font-size: 11px; text-align: center; }
@media (max-width: 520px) { .login-shell { padding: 28px 18px; } }
@media (prefers-reduced-motion: reduce) { .login-field input, .login-submit { transition: none; transform: none !important; } }