/* 上海美华系统 — 登录页（深色 / 浅色双主题） */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
}

.login-page {
    font-family: 'Noto Sans SC', system-ui, sans-serif;
    min-height: 100vh;
    display: flex;
    background: var(--login-bg);
    color: var(--login-text);
    overflow-x: hidden;
    overflow-y: auto;
    transition: background 0.35s ease, color 0.35s ease;
}

/* ===== 深色主题（默认） ===== */
:root,
[data-theme="dark"] {
    --login-bg: #060d18;
    --login-text: #e2e8f0;
    --login-brand-bg: linear-gradient(145deg, #071428 0%, #0c2347 45%, #091a33 100%);
    --login-panel-bg: #060d18;
    --login-panel-glow: radial-gradient(circle at 30% 20%, rgba(37, 99, 235, 0.08), transparent 50%);
    --login-card-bg: rgba(15, 23, 42, 0.65);
    --login-card-border: rgba(148, 163, 184, 0.12);
    --login-card-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --login-title: #f1f5f9;
    --login-muted: #64748b;
    --login-label: #94a3b8;
    --login-input-bg: rgba(15, 23, 42, 0.8);
    --login-input-border: rgba(71, 85, 105, 0.5);
    --login-input-text: #f1f5f9;
    --login-input-placeholder: #475569;
    --login-input-icon: #475569;
    --login-feature-bg: rgba(15, 23, 42, 0.5);
    --login-feature-border: rgba(37, 99, 235, 0.15);
    --login-headline: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
    --login-footer-border: rgba(71, 85, 105, 0.3);
    --login-toggle-bg: rgba(15, 23, 42, 0.8);
    --login-toggle-border: rgba(71, 85, 105, 0.5);
    --login-toggle-active-bg: rgba(37, 99, 235, 0.25);
    --login-toggle-active-border: rgba(37, 99, 235, 0.5);
    --login-toggle-active-text: #60a5fa;
}

/* ===== 浅色主题 ===== */
[data-theme="light"] {
    --login-bg: #f0f4f8;
    --login-text: #1e293b;
    --login-brand-bg: linear-gradient(145deg, #e8f0fe 0%, #f0f7ff 45%, #e2ecf8 100%);
    --login-panel-bg: #f8fafc;
    --login-panel-glow: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.06), transparent 55%);
    --login-card-bg: #ffffff;
    --login-card-border: #e2e8f0;
    --login-card-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.12);
    --login-title: #0f172a;
    --login-muted: #64748b;
    --login-label: #475569;
    --login-input-bg: #f8fafc;
    --login-input-border: #cbd5e1;
    --login-input-text: #0f172a;
    --login-input-placeholder: #94a3b8;
    --login-input-icon: #64748b;
    --login-feature-bg: #ffffff;
    --login-feature-border: #e2e8f0;
    --login-headline: linear-gradient(135deg, #0f172a 0%, #334155 100%);
    --login-footer-border: #e2e8f0;
    --login-toggle-bg: #f1f5f9;
    --login-toggle-border: #cbd5e1;
    --login-toggle-active-bg: #eff6ff;
    --login-toggle-active-border: #93c5fd;
    --login-toggle-active-text: #2563eb;
}

[data-theme="light"] .login-brand-name { color: #0f172a; }
[data-theme="light"] .login-brand-sub { color: #64748b; }
[data-theme="light"] .login-desc { color: #475569; }
[data-theme="light"] .login-feature-title { color: #1e293b; }
[data-theme="light"] .login-feature-text { color: #64748b; }
[data-theme="light"] .login-grid {
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px);
}
[data-theme="light"] .login-glow { opacity: 0.2; }
[data-theme="light"] .login-mobile-brand span { color: #1e293b; }

/* 主题切换器 */
.login-theme-switch {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    z-index: 10;
    display: flex;
    gap: 0.375rem;
    padding: 0.25rem;
    border-radius: 0.625rem;
    background: var(--login-toggle-bg);
    border: 1px solid var(--login-toggle-border);
}

.login-theme-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--login-muted);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.login-theme-btn.is-active {
    background: var(--login-toggle-active-bg);
    border-color: var(--login-toggle-active-border);
    color: var(--login-toggle-active-text);
}

.login-theme-btn svg {
    width: 0.875rem;
    height: 0.875rem;
}

/* 左侧品牌区 */
.login-brand {
    flex: 1.1;
    position: relative;
    display: none;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 4rem;
    background: var(--login-brand-bg);
    overflow: hidden;
    transition: background 0.35s ease;
}

.login-brand-bg {
    position: absolute;
    inset: 0;
    background-image: url('login-bg-ai.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1.04);
    animation: loginBgDrift 28s ease-in-out infinite alternate;
    z-index: 0;
}

.login-brand-overlay {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        linear-gradient(115deg, rgba(6, 13, 24, 0.88) 0%, rgba(8, 24, 48, 0.72) 42%, rgba(9, 26, 51, 0.55) 100%),
        linear-gradient(180deg, rgba(6, 13, 24, 0.35) 0%, transparent 40%, rgba(6, 13, 24, 0.55) 100%);
    pointer-events: none;
}

[data-theme="light"] .login-brand-overlay {
    background:
        linear-gradient(115deg, rgba(232, 240, 254, 0.88) 0%, rgba(240, 247, 255, 0.78) 45%, rgba(226, 236, 248, 0.7) 100%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.25) 0%, transparent 45%, rgba(226, 236, 248, 0.45) 100%);
}

[data-theme="light"] .login-brand-bg {
    filter: saturate(0.85) brightness(1.15);
    opacity: 0.85;
}

@keyframes loginBgDrift {
    from { transform: scale(1.04) translate(0, 0); }
    to { transform: scale(1.08) translate(-1.5%, -1%); }
}

@media (min-width: 1024px) {
    .login-brand { display: flex; }
}

.login-grid {
    position: absolute;
    inset: 0;
    z-index: 1;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.07) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 75%);
    pointer-events: none;
}

.login-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: loginFloat 8s ease-in-out infinite;
    z-index: 1;
    pointer-events: none;
}

.login-glow-a { width: 320px; height: 320px; background: #2563eb; top: -80px; right: -60px; }
.login-glow-b { width: 280px; height: 280px; background: #0891b2; bottom: -40px; left: -40px; animation-delay: -4s; }

@keyframes loginFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(12px, -16px) scale(1.05); }
}

.login-brand-inner { position: relative; z-index: 2; max-width: 28rem; }

.login-brand-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.login-brand-logo img {
    width: 3.5rem;
    height: 3.5rem;
    filter: drop-shadow(0 0 20px rgba(37, 99, 235, 0.5));
}

.login-brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #f8fafc;
}

.login-brand-sub {
    font-size: 0.8rem;
    color: #64748b;
    font-family: 'JetBrains Mono', monospace;
    margin-top: 0.25rem;
}

.login-headline {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 1rem;
    background: var(--login-headline);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-desc {
    font-size: 0.95rem;
    line-height: 1.75;
    color: #94a3b8;
    margin-bottom: 2.5rem;
}

.login-features { display: grid; gap: 1rem; }

.login-feature {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    padding: 1rem 1.125rem;
    border-radius: 0.75rem;
    background: var(--login-feature-bg);
    border: 1px solid var(--login-feature-border);
    backdrop-filter: blur(8px);
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.login-feature:hover {
    border-color: rgba(37, 99, 235, 0.35);
    transform: translateX(4px);
}

[data-theme="light"] .login-feature:hover {
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.login-feature-icon {
    flex-shrink: 0;
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    background: rgba(37, 99, 235, 0.15);
    font-size: 1rem;
}

.login-feature-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 0.15rem;
}

.login-feature-text {
    font-size: 0.75rem;
    color: #64748b;
    line-height: 1.5;
}

/* 右侧表单区 */
.login-form-panel {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2rem;
    position: relative;
    background: var(--login-panel-bg);
    transition: background 0.35s ease;
    overflow-y: auto;
    max-height: 100vh;
    -webkit-overflow-scrolling: touch;
}

.login-form-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--login-panel-glow);
    pointer-events: none;
}

.login-card {
    position: relative;
    width: 100%;
    max-width: 26rem;
    margin-top: auto;
    margin-bottom: auto;
    padding: 2.5rem;
    border-radius: 1.25rem;
    background: var(--login-card-bg);
    border: 1px solid var(--login-card-border);
    box-shadow: var(--login-card-shadow);
    animation: loginCardIn 0.6s ease-out;
    overflow: hidden;
    transition: background 0.35s, border-color 0.35s, box-shadow 0.35s;
}

@keyframes loginCardIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card-header { text-align: center; margin-bottom: 2rem; }

.login-card-logo {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    filter: drop-shadow(0 0 16px rgba(37, 99, 235, 0.4));
}

.login-card-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--login-title);
    margin-bottom: 0.35rem;
}

.login-card-subtitle { font-size: 0.8125rem; color: var(--login-muted); }

.login-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.6875rem;
    font-family: 'JetBrains Mono', monospace;
    color: #38bdf8;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

[data-theme="light"] .login-card-badge {
    color: #0284c7;
    background: #e0f2fe;
    border-color: #bae6fd;
}

.login-card-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #22d3ee;
    box-shadow: 0 0 8px #22d3ee;
    animation: loginPulse 2s ease-in-out infinite;
}

@keyframes loginPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.login-error {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
    border-radius: 0.625rem;
    font-size: 0.8125rem;
    color: #dc2626;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.login-form {
    width: 100%;
    max-width: 100%;
}

.login-field {
    margin-bottom: 1.25rem;
    width: 100%;
}

.login-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--login-label);
    margin-bottom: 0.35rem;
}
.login-label.req::after {
    content: ' *';
    color: #ef4444;
    font-weight: 600;
}
.login-field-hint {
    font-size: 0.75rem;
    color: var(--login-muted);
    margin-top: 0.35rem;
    line-height: 1.4;
}

/* 人机验证：点「验证」展开滑块，通过后按钮转为已通过态 */
.login-verify-btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.625rem;
    border: 1px dashed rgba(37, 99, 235, 0.5);
    background: rgba(37, 99, 235, 0.06);
    color: #2563eb;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.login-verify-btn:hover:not(:disabled) {
    background: rgba(37, 99, 235, 0.12);
}

.login-verify-btn:disabled {
    cursor: default;
    color: #059669;
    border-style: solid;
    border-color: rgba(5, 150, 105, 0.45);
    background: rgba(5, 150, 105, 0.08);
}

html.dark .login-verify-btn {
    color: #60a5fa;
    border-color: rgba(96, 165, 250, 0.5);
    background: rgba(96, 165, 250, 0.1);
}

html.dark .login-verify-btn:disabled {
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.45);
    background: rgba(52, 211, 153, 0.1);
}

.login-input-wrap {
    position: relative;
    width: 100%;
    max-width: 100%;
}

.login-input-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--login-input-icon);
    pointer-events: none;
    z-index: 1;
}

.login-input {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding: 0.75rem 0.875rem 0.75rem 2.5rem;
    border-radius: 0.625rem;
    font-size: 0.9375rem;
    color: var(--login-input-text);
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-input::placeholder { color: var(--login-input-placeholder); }

.login-input:focus {
    border-color: rgba(37, 99, 235, 0.6);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.login-submit {
    display: block;
    width: 100%;
    max-width: 100%;
    margin-top: 0.5rem;
    padding: 0.875rem;
    border: none;
    border-radius: 0.625rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #0891b2 100%);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
    transition: transform 0.2s, box-shadow 0.2s;
}

.login-submit:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(37, 99, 235, 0.45);
}

.login-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.login-footer {
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--login-footer-border);
    text-align: center;
    font-size: 0.6875rem;
    color: var(--login-muted);
    line-height: 1.6;
}

.login-footer strong { color: var(--login-label); font-weight: 500; }

.login-mobile-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
    .login-mobile-brand { display: none; }
}

.login-mobile-brand img { width: 2.5rem; height: 2.5rem; }
.login-mobile-brand span { font-size: 1rem; font-weight: 600; color: #e2e8f0; }

@media (max-width: 1023px) {
    .login-card-header .login-card-logo { display: none; }

    .login-form-panel {
        background-image:
            linear-gradient(180deg, rgba(6, 13, 24, 0.88), rgba(6, 13, 24, 0.92)),
            url('login-bg-ai.jpg');
        background-size: cover;
        background-position: center;
    }

    [data-theme="light"] .login-form-panel {
        background-image:
            linear-gradient(180deg, rgba(248, 250, 252, 0.9), rgba(241, 245, 249, 0.94)),
            url('login-bg-ai.jpg');
    }
}