:root {
    --auth-canvas: #261d1a;
    --auth-canvas-raised: #352621;
    --auth-surface: #ffffff;
    --auth-brand: #ff5722;
    --auth-brand-hover: #e64a19;
    --auth-brand-active: #cf3f14;
    --auth-brand-light: #ffab91;
    --auth-brand-icon: #9a7568;
    --auth-field-warm: #fffdfc;
    --auth-field-warm-soft: #fff8f5;
    --auth-field-warm-border: #e5d7d2;
    --auth-field-warm-hover: #c9a79b;
    --auth-text: #262626;
    --auth-text-muted: #666666;
    --auth-border: rgba(255, 255, 255, 0.12);
    --auth-shadow: 0 2px 5px rgba(0, 0, 0, 0.24), 0 18px 48px rgba(0, 0, 0, 0.2);
}

/* Legacy compact login keeps its geometry while sharing the center brand palette. */
.login-page--legacy-compact {
    --auth-canvas: #dedbd9;
    --auth-brand: #b94724;
    --auth-brand-hover: #a43d1e;
    --auth-brand-active: #8f341a;
    --auth-brand-light: #d9a08d;
    --auth-brand-icon: #8b756d;
    --auth-field-warm: #fffefd;
    --auth-field-warm-soft: #f7f5f3;
    --auth-field-warm-border: #ddd6d2;
    --auth-field-warm-hover: #b9aaa3;
    background:
        radial-gradient(circle at 18% 16%, rgba(185, 71, 36, .1), transparent 34%),
        radial-gradient(circle at 82% 84%, rgba(185, 71, 36, .065), transparent 30%),
        var(--auth-canvas) !important;
}
.login-page--legacy-compact .layui-container { position: relative; background: transparent !important; }
.login-page--legacy-compact .admin-login-background { z-index: 2; }
.login-page--legacy-compact .login-form {
    border-color: rgba(91, 69, 61, .1) !important;
    background: var(--auth-surface) !important;
    box-shadow: 0 1px 3px rgba(69, 54, 48, .08), 0 14px 36px rgba(69, 54, 48, .1) !important;
}
.login-page--legacy-compact .logo-title h1 { color: var(--auth-brand) !important; }
.login-page--legacy-compact .login-form .layui-form-item label { color: var(--auth-brand-icon); }
.login-page--legacy-compact .login-form .layui-input { border-color: var(--auth-field-warm-border); background: var(--auth-field-warm); }
.login-page--legacy-compact .login-form .layui-input:hover { border-color: var(--auth-field-warm-hover); }
.login-page--legacy-compact .login-form .layui-input:focus { border-color: var(--auth-brand) !important; background: var(--auth-surface); box-shadow: 0 0 0 3px rgba(185, 71, 36, .1); }
.login-page--legacy-compact #slider { overflow: hidden; border: 1px solid var(--auth-field-warm-border); border-radius: 4px; background: var(--auth-field-warm-soft); }
.login-page--legacy-compact .layui-bg-blue { background-color: var(--auth-brand) !important; }
.login-page--legacy-compact .layui-btn-normal { color: var(--auth-surface); background: var(--auth-brand) !important; }
.login-page--legacy-compact .layui-btn-normal:hover { color: var(--auth-surface); background: var(--auth-brand-hover) !important; }
.login-page--legacy-compact .layui-btn-normal:active { background: var(--auth-brand-active) !important; }
.login-page--legacy-compact .layui-btn-normal:focus-visible { outline: 2px solid var(--auth-brand-light); outline-offset: 3px; }
.login-page--legacy-compact .layui-btn-normal:disabled,
.login-page--legacy-compact .layui-btn-normal.layui-btn-disabled { cursor: not-allowed; opacity: .55; }

html,
body {
    background: var(--auth-canvas) !important;
}

.layui-container {
    background: transparent;
}

.login-form,
.register-form {
    border: 1px solid var(--auth-border) !important;
    border-radius: 8px !important;
    background: var(--auth-surface) !important;
    box-shadow: var(--auth-shadow) !important;
}

.logo-title h1 {
    color: var(--auth-text) !important;
    letter-spacing: 0 !important;
}

.login-form .layui-input,
.register-form .layui-input {
    border-color: #dfe3e8;
}

.login-form .layui-input:hover,
.register-form .layui-input:hover {
    border-color: #c8ced5;
}

.login-form .layui-input:focus,
.register-form .layui-input:focus {
    border-color: var(--auth-brand) !important;
    box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.14);
}

.login-form .layui-btn-normal,
.register-form .layui-btn-normal,
.login-form .layui-bg-blue,
.register-form .layui-bg-blue {
    background-color: var(--auth-brand) !important;
}

.login-form .layui-btn-normal:hover,
.register-form .layui-btn-normal:hover {
    background-color: var(--auth-brand-hover) !important;
}

.login-form .layui-btn-normal:active,
.register-form .layui-btn-normal:active {
    opacity: 0.88;
}

.login-form .layui-btn-normal:focus-visible,
.register-form .layui-btn-normal:focus-visible,
.login-form a:focus-visible,
.register-form a:focus-visible {
    outline: 2px solid var(--auth-brand);
    outline-offset: 2px;
}

.login-form .layui-btn-normal:disabled,
.register-form .layui-btn-normal:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.login-form .layui-form-item a:hover,
.register-form .layui-form-item a:hover {
    color: var(--auth-brand) !important;
}

@media (prefers-reduced-motion: reduce) {
    .login-form *,
    .register-form * {
        transition: none !important;
    }
}

/* Learning center login */
.login-page {
    --auth-panel: var(--auth-surface);
    --auth-panel-muted: #f7f8fa;
    --auth-ink-on-dark: #ffffff;
    --auth-ink-on-dark-muted: #c5ccd3;
    --auth-field-border: #d8dde3;
    --auth-error: #c73527;
    min-width: 320px;
    min-height: 100vh;
    overflow: auto;
    color: var(--auth-text);
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

.login-page .auth-layout { display: grid; min-height: 100vh; grid-template-columns: minmax(420px, 46%) minmax(520px, 54%); }
.login-page .auth-brand-panel { position: relative; display: flex; min-height: 680px; overflow: hidden; color: var(--auth-ink-on-dark); background: var(--auth-canvas); }
.login-page .auth-brand-panel::before { position: absolute; top: -160px; right: -140px; width: 420px; height: 420px; border: 1px solid var(--auth-border); border-radius: 50%; content: ""; }
.login-page .auth-brand-panel::after { position: absolute; right: 8%; bottom: 10%; width: 148px; height: 148px; opacity: .22; background-image: radial-gradient(circle, var(--auth-brand) 2px, transparent 2px); background-size: 18px 18px; content: ""; }
.login-page .auth-brand-inner { position: relative; z-index: 1; display: flex; width: min(480px, calc(100% - 96px)); margin: 0 auto; padding: 52px 0 72px; flex-direction: column; }
.login-page .auth-brand-mark, .login-page .auth-mobile-brand { display: flex; align-items: center; gap: 12px; }
.login-page .auth-brand-mark span, .login-page .auth-mobile-brand span { font-size: 18px; line-height: 26px; font-weight: 600; letter-spacing: 1px; }
.login-page .auth-logo, .login-page .auth-mobile-brand img { display: block; box-sizing: border-box; width: 48px; height: 48px; padding: 5px; border-radius: 6px; object-fit: contain; background: var(--auth-surface); }
.login-page .auth-brand-copy { margin: auto 0 50px; }
.login-page .auth-eyebrow { display: inline-flex; align-items: center; color: var(--auth-brand); font-size: 14px; line-height: 22px; font-weight: 600; letter-spacing: 3px; }
.login-page .auth-eyebrow::before { width: 30px; height: 2px; margin-right: 12px; background: var(--auth-brand); content: ""; }
.login-page .auth-brand-copy h1 { margin: 20px 0 18px; color: var(--auth-ink-on-dark); font-size: clamp(36px, 3.2vw, 52px); line-height: 1.25; font-weight: 600; letter-spacing: -2px; }
.login-page .auth-brand-copy p { max-width: 390px; margin: 0; color: var(--auth-ink-on-dark-muted); font-size: 16px; line-height: 28px; }
.login-page .auth-feature-list { display: grid; margin: 0; padding: 0; list-style: none; gap: 16px; }
.login-page .auth-feature-list li { display: grid; align-items: center; grid-template-columns: 40px 1fr; gap: 14px; color: var(--auth-ink-on-dark-muted); font-size: 13px; line-height: 20px; }
.login-page .auth-feature-list i { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; border: 1px solid var(--auth-border); border-radius: 8px; color: var(--auth-brand); background: rgba(255, 255, 255, .04); font-size: 18px; }
.login-page .auth-feature-list strong { display: block; color: var(--auth-ink-on-dark); font-size: 15px; line-height: 22px; font-weight: 500; }
.login-page .auth-brand-footer { position: absolute; bottom: 24px; left: 48px; margin: 0; color: var(--auth-ink-on-dark-muted); font-size: 12px; }

.login-page .auth-form-panel { display: flex; min-height: 680px; align-items: center; justify-content: center; padding: 48px; background: var(--auth-panel-muted); }
.login-page .auth-form-wrap { width: min(420px, 100%); }
.login-page .auth-mobile-brand { display: none; }
.login-page .auth-form-header { margin-bottom: 34px; }
.login-page .auth-form-kicker { color: var(--auth-brand); font-size: 13px; line-height: 20px; font-weight: 600; letter-spacing: 2px; }
.login-page .auth-form-header h2 { margin: 8px 0 10px; color: var(--auth-text); font-size: 30px; line-height: 40px; font-weight: 600; letter-spacing: -1px; }
.login-page .auth-form-header p { margin: 0; color: var(--auth-text-muted); font-size: 14px; line-height: 22px; }
.login-page .login-form { padding: 0; border: 0 !important; border-radius: 0 !important; background: transparent !important; box-shadow: none !important; }
.login-page .auth-field { margin-bottom: 20px; }
.login-page .auth-field > label, .login-page .auth-verify-heading > span { display: block; margin-bottom: 8px; color: var(--auth-text); font-size: 14px; line-height: 22px; font-weight: 500; }
.login-page .auth-input-wrap { position: relative; }
.login-page .auth-input-wrap > i { position: absolute; top: 0; left: 15px; z-index: 1; color: var(--auth-text-muted); font-size: 18px; line-height: 48px; pointer-events: none; }
.login-page .auth-input-wrap .layui-input { box-sizing: border-box; height: 48px; padding: 0 48px 0 46px; border: 1px solid var(--auth-field-border); border-radius: 6px; color: var(--auth-text); background: var(--auth-panel); font-size: 14px; transition: border-color 140ms ease, box-shadow 140ms ease, background-color 140ms ease; }
.login-page .auth-input-wrap .layui-input:hover { border-color: var(--auth-text-muted); }
.login-page .auth-input-wrap .layui-input:focus { border-color: var(--auth-brand) !important; box-shadow: 0 0 0 3px rgba(255, 87, 34, .14); }
.login-page .auth-input-wrap .layui-input[aria-invalid="true"] { border-color: var(--auth-error); }
.login-page .auth-password-toggle { position: absolute; top: 4px; right: 5px; display: inline-flex; width: 40px; height: 40px; padding: 0; align-items: center; justify-content: center; border: 0; border-radius: 4px; color: var(--auth-text-muted); cursor: pointer; background: transparent; }
.login-page .auth-password-toggle:hover { color: var(--auth-brand); background: var(--auth-panel-muted); }
.login-page .auth-password-toggle:active { background: var(--auth-field-border); }
.login-page .auth-password-toggle:focus-visible { outline: 2px solid var(--auth-brand); outline-offset: 1px; }
.login-page .auth-password-toggle:disabled { cursor: not-allowed; opacity: .5; }
.login-page .auth-field-error { min-height: 18px; margin: 4px 0 0; color: var(--auth-error); font-size: 12px; line-height: 18px; }
.login-page .auth-verify-field { margin-bottom: 24px; }
.login-page .auth-verify-heading { display: flex; align-items: center; justify-content: space-between; }
.login-page .auth-verify-heading small { color: var(--auth-text-muted); font-size: 12px; line-height: 20px; }
.login-page #slider { overflow: hidden; border-radius: 6px; background: var(--auth-panel); }
.login-page .auth-slider-complete { background-color: var(--auth-brand) !important; }
.login-page .auth-request-error { margin: -8px 0 16px; padding: 10px 12px; border-left: 3px solid var(--auth-error); border-radius: 4px; color: var(--auth-error); background: #fff1ef; font-size: 13px; line-height: 20px; }
.login-page .auth-submit { display: inline-flex; width: 100%; height: 48px; margin: 0; padding: 0 20px; align-items: center; justify-content: center; border: 0; border-radius: 6px; color: var(--auth-ink-on-dark); background: var(--auth-brand); font-size: 16px; font-weight: 600; line-height: 48px; box-shadow: 0 8px 20px rgba(255, 87, 34, .2); transition: background-color 140ms ease, box-shadow 140ms ease, transform 140ms ease; }
.login-page .auth-submit:hover { color: var(--auth-ink-on-dark); background: var(--auth-brand-hover); box-shadow: 0 10px 24px rgba(255, 87, 34, .26); }
.login-page .auth-submit:active { transform: translateY(1px); box-shadow: 0 4px 12px rgba(255, 87, 34, .18); }
.login-page .auth-submit:focus-visible { outline: 2px solid var(--auth-brand); outline-offset: 3px; }
.login-page .auth-submit:disabled { cursor: not-allowed; opacity: .62; box-shadow: none; transform: none; }
.login-page .auth-submit-loading { display: inline-flex; align-items: center; gap: 8px; }
.login-page .auth-submit-loading[hidden], .login-page .auth-submit-label[hidden] { display: none; }
.login-page .auth-help { margin: 24px 0 0; color: var(--auth-text-muted); font-size: 12px; line-height: 20px; text-align: center; }

@media (max-width: 959px) {
    .login-page .auth-layout { grid-template-columns: minmax(0, 1fr); }
    .login-page .auth-brand-panel { display: none; }
    .login-page .auth-form-panel { min-height: 100vh; padding: 40px 24px; }
    .login-page .auth-mobile-brand { display: flex; margin-bottom: 48px; }
    .login-page .auth-mobile-brand span { color: var(--auth-text); }
}

@media (max-width: 479px) {
    .login-page .auth-form-panel { align-items: flex-start; padding: 28px 20px; background: var(--auth-panel); }
    .login-page .auth-mobile-brand { margin-bottom: 36px; }
    .login-page .auth-form-header { margin-bottom: 28px; }
    .login-page .auth-form-header h2 { font-size: 26px; line-height: 36px; }
    .login-page .auth-verify-heading small { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .login-page *, .login-page *::before, .login-page *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Compact login: the authentication task is the only visual priority. */
.login-page .auth-layout--simple {
    position: relative;
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 32px;
    background: var(--auth-canvas);
}
.login-page .auth-layout--simple::before {
    position: absolute;
    inset: 0;
    opacity: .18;
    background-image: radial-gradient(circle at 50% 18%, var(--auth-brand) 0, transparent 34%);
    content: "";
    pointer-events: none;
}
.login-page .auth-layout--simple .auth-form-panel {
    position: relative;
    z-index: 1;
    display: block;
    box-sizing: border-box;
    width: min(420px, 100%);
    min-height: 0;
    padding: 38px 40px 40px;
    border: 1px solid var(--auth-border);
    border-radius: 8px;
    background: var(--auth-surface);
    box-shadow: var(--auth-shadow);
}
.login-page .auth-layout--simple .auth-form-wrap { width: 100%; }
.login-page .auth-simple-brand { display: flex; margin-bottom: 28px; align-items: center; justify-content: center; gap: 10px; }
.login-page .auth-simple-brand img { display: block; box-sizing: border-box; width: 42px; height: 42px; padding: 4px; border: 1px solid var(--auth-field-border); border-radius: 6px; object-fit: contain; background: var(--auth-surface); }
.login-page .auth-simple-brand span { color: var(--auth-text); font-size: 17px; line-height: 24px; font-weight: 600; }
.login-page .auth-layout--simple .auth-form-header { margin-bottom: 26px; text-align: center; }
.login-page .auth-layout--simple .auth-form-header h1 { margin: 0; color: var(--auth-text); font-size: 24px; line-height: 34px; font-weight: 600; }
.login-page .auth-layout--simple .auth-field { margin-bottom: 16px; }
.login-page .auth-layout--simple .auth-verify-field { margin-bottom: 20px; }

@media (max-width: 959px) {
    .login-page .auth-layout--simple { padding: 24px; }
}

@media (max-width: 479px) {
    .login-page .auth-layout--simple { align-items: stretch; padding: 0; background: var(--auth-surface); }
    .login-page .auth-layout--simple::before { display: none; }
    .login-page .auth-layout--simple .auth-form-panel { width: 100%; padding: 44px 20px 28px; border: 0; border-radius: 0; box-shadow: none; }
}

/* Original compact login geometry with brand-aligned color only. */
.login-page .auth-layout--simple { align-items: flex-start; padding: max(120px, 18vh) 20px 24px; background: var(--auth-canvas); }
.login-page .auth-layout--simple::before { display: none; }
.login-page .auth-layout--simple .auth-form-panel { width: min(360px, 100%); padding: 18px 20px 20px; border: 1px solid var(--auth-border); border-radius: 4px; box-shadow: 0 1px 3px rgba(0, 0, 0, .18), 0 10px 28px rgba(0, 0, 0, .16); }
.login-page .auth-layout--simple .auth-form-header { margin-bottom: 18px; }
.login-page .auth-layout--simple .auth-form-header h1 { color: var(--auth-brand); font-size: 25px; line-height: 36px; }
.login-page .auth-layout--simple .auth-field { margin-bottom: 12px; }
.login-page .auth-layout--simple .auth-input-wrap .layui-input { height: 38px; padding-left: 38px; border-radius: 3px; }
.login-page .auth-layout--simple .auth-input-wrap > i { left: 11px; font-size: 16px; line-height: 38px; }
.login-page .auth-layout--simple .auth-verify-field { margin-bottom: 14px; }
.login-page .auth-layout--simple .auth-verify-heading { display: none; }
.login-page .auth-layout--simple .auth-submit { height: 38px; border-radius: 3px; font-size: 14px; line-height: 38px; box-shadow: none; }
.login-page .auth-visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; clip: rect(0 0 0 0) !important; white-space: nowrap !important; }

@media (max-width: 479px) {
    .login-page .auth-layout--simple { align-items: flex-start; padding: 72px 20px 24px; background: var(--auth-canvas); }
    .login-page .auth-layout--simple .auth-form-panel { width: min(360px, 100%); padding: 18px 20px 20px; border: 1px solid var(--auth-border); border-radius: 4px; box-shadow: var(--auth-shadow); }
}