/* ============================================
   Google Family Manager - Design System
   Style: Flat Design (Dark Theme)
   Colors: #3B82F6 (Primary) / #F97316 (CTA)
   Fonts: Fira Sans / Fira Code
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Fira+Sans:wght@300;400;500;600;700&display=swap');

/* --- CSS Variables --- */
:root {
    color-scheme: dark;
    --bg-primary: #0A0E27;
    --bg-secondary: #111638;
    --bg-card: #161B40;
    --bg-card-hover: #1C2252;
    --bg-input: #1E2350;
    --bg-modal: #161B40;

    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    --accent-blue: #3B82F6;
    --accent-blue-hover: #2563EB;
    --accent-orange: #F97316;
    --accent-orange-hover: #EA580C;
    --accent-green: #22C55E;
    --accent-red: #EF4444;
    --accent-yellow: #EAB308;
    --accent-amber: #F59E0B;

    --border: #1E293B;
    --border-light: #334155;

    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;

    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --transition: 200ms ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Fira Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* --- Layout --- */
.app {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* --- Sidebar --- */
.sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 10;
}

.sidebar-logo {
    padding: 0 20px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-logo h1 {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-blue);
}

.sidebar-logo span {
    font-size: 12px;
    color: var(--text-secondary);
}

.sidebar-nav {
    list-style: none;
    flex: 1;
}

.sidebar-nav li {
    margin: 2px 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
}

.sidebar-nav a:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--accent-blue);
    color: white;
}

.sidebar-nav .nav-icon {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.sidebar-nav a.active .nav-icon {
    opacity: 1;
}

/* --- Main Content --- */
.main {
    flex: 1;
    margin-left: 220px;
    padding: 24px 32px;
    position: relative;
    overflow: hidden;
}

/* 背景光晕装饰（与登录页统一） */
.main::before,
.main::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
}

.main::before {
    width: 400px;
    height: 400px;
    background: var(--accent-blue);
    opacity: 0.06;
    top: -100px;
    right: -50px;
}

.main::after {
    width: 350px;
    height: 350px;
    background: var(--accent-orange);
    opacity: 0.04;
    bottom: -80px;
    left: 180px;
}

.main>* {
    position: relative;
    z-index: 1;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h2 {
    font-size: 22px;
    font-weight: 700;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.badge-count {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    transition: border-color 0.2s;
}

.search-box:focus-within {
    border-color: var(--primary);
}

.search-box svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    width: 160px;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.days-tag {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    margin-left: 4px;
}

.days-tag.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.days-tag.urgent {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.group-card.warning {
    border-left: 3px solid #f59e0b;
}

.group-card.urgent {
    border-left: 3px solid #ef4444;
}

/* --- Cards --- */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: background var(--transition);
}

.stat-card:hover {
    background: var(--bg-card-hover);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-icon.blue {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
}

.stat-icon.green {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.stat-icon.orange {
    background: rgba(249, 115, 22, 0.15);
    color: var(--accent-orange);
}

.stat-icon.red {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.stat-info label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-info .stat-value {
    font-family: 'Fira Code', monospace;
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

/* --- Tables --- */
.table-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.table-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.batch-action-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 14px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 8px;
    font-size: 13px;
    color: var(--accent);
}

/* 暗色 checkbox */
table input[type="checkbox"],
.alert-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* 邮件模板区域 code 标签 */
.settings-hint code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
    color: var(--accent);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 12px 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 14px 20px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--bg-card-hover);
}

/* --- Alert Badges --- */
.alert-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.alert-badge.critical {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.alert-badge.warning {
    background: rgba(249, 115, 22, 0.15);
    color: var(--accent-orange);
}

.alert-badge.caution {
    background: rgba(234, 179, 8, 0.15);
    color: var(--accent-yellow);
}

.alert-badge.normal {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.alert-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.alert-dot.critical {
    background: var(--accent-red);
}

.alert-dot.warning {
    background: var(--accent-orange);
}

.alert-dot.caution {
    background: var(--accent-yellow);
}

.alert-dot.normal {
    background: var(--accent-green);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-blue-hover);
}

.btn-cta {
    background: var(--accent-orange);
    color: white;
}

.btn-cta:hover {
    background: var(--accent-orange-hover);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

.btn-outline:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-icon {
    padding: 6px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* --- Group Cards --- */
.group-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.group-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
    cursor: pointer;
}

.group-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
}

.group-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.group-card-header h4 {
    font-size: 16px;
    font-weight: 600;
}

.member-count {
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.member-count.full {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.member-count.available {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.group-card-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 13px;
}

.group-card-info dt {
    color: var(--text-secondary);
}

.group-card-info dd {
    text-align: right;
    font-weight: 500;
}

.group-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--bg-modal);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    width: 500px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(20px);
    transition: transform var(--transition);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input:not(.toggle-input),
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    transition: border-color var(--transition);
    box-sizing: border-box;
}

.form-group input:not(.toggle-input),
.form-group select {
    height: 40px;
}

.form-group select {
    appearance: none;
    -webkit-appearance: none;
    padding-right: 36px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b8fa3' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    cursor: pointer;
}

/* --- Custom Dark Datepicker --- */
.custom-datepicker {
    position: relative;
}

.custom-datepicker input {
    width: 100%;
    padding-right: 36px;
    cursor: pointer;
}

.datepicker-toggle {
    position: absolute;
    right: 1px;
    top: 1px;
    bottom: 1px;
    width: 34px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: color 0.2s;
}

.datepicker-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.datepicker-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    z-index: 1000;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    min-width: 280px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.datepicker-dropdown.open {
    display: block;
}

.dp-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.dp-header span {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.dp-nav {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 16px;
    transition: all 0.2s;
}

.dp-nav:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.dp-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    margin-bottom: 4px;
}

.dp-weekdays span {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 4px 0;
}

.dp-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.dp-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--text-primary);
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
}

.dp-day:hover {
    background: rgba(59, 130, 246, 0.2);
}

.dp-day.other-month {
    color: var(--text-secondary);
    opacity: 0.4;
}

.dp-day.today {
    border: 1px solid var(--accent-blue);
    font-weight: 600;
}

.dp-day.selected {
    background: var(--accent-blue);
    color: #fff;
    font-weight: 600;
}

.dp-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.dp-footer button {
    background: transparent;
    border: none;
    color: var(--accent-blue);
    font-size: 13px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.dp-footer button:hover {
    background: rgba(59, 130, 246, 0.15);
}

/* --- Toggle Switch --- */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    user-select: none;
}

.toggle-input {
    display: none;
}

.toggle-switch {
    display: inline-block;
    position: relative;
    width: 40px;
    min-width: 40px;
    height: 22px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 11px;
    transition: background 0.25s;
    flex-shrink: 0;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: all 0.25s;
}

.toggle-input:checked+.toggle-switch {
    background: var(--accent-blue);
}

.toggle-input:checked+.toggle-switch::after {
    left: 21px;
    background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 20px;
}

/* --- Search Bar --- */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.search-bar input {
    flex: 1;
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.search-bar select {
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

/* --- Status Badge --- */
.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.active {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.status-badge.inactive {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* --- Toast --- */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    animation: slideIn 300ms ease, fadeOut 300ms ease 2700ms forwards;
    max-width: 360px;
}

.toast.success {
    background: var(--accent-green);
    color: white;
}

.toast.error {
    background: var(--accent-red);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateY(10px);
    }
}

/* --- 日期快捷按钮 --- */
.date-shortcuts {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.date-shortcuts button {
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.date-shortcuts button:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* --- 汉堡菜单 + 遮罩 --- */
.menu-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 30;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9;
}

.sidebar-overlay.active {
    display: block;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .group-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {

    /* 汉堡按钮 */
    .menu-toggle {
        display: flex;
    }

    /* 侧边栏滑出 */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    /* 主内容全宽 */
    .main {
        margin-left: 0;
        padding: 60px 16px 16px;
    }

    /* 卡片 2→1 列 */
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 统计值缩小 */
    .stat-info .stat-value {
        font-size: 20px;
    }

    .stat-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    /* 表格横滚 */
    .table-section {
        overflow-x: auto;
    }

    .table-section table {
        min-width: 600px;
    }

    /* 搜索栏竖排 */
    .search-bar {
        flex-direction: column;
    }

    /* 模态框全屏 */
    .modal {
        width: 95vw;
        max-height: 90vh;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* 页头 */
    .page-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .page-header h2 {
        font-size: 18px;
    }

    /* Toast 居中 */
    .toast-container {
        right: 16px;
        left: 16px;
    }

    .toast {
        max-width: 100%;
    }
}

/* ============================================
   Settings Page - Tab Layout
   ============================================ */
.settings-layout {
    display: flex;
    gap: 0;
    min-height: 480px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

.settings-tabs {
    flex: 0 0 200px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 12px 0;
    display: flex;
    flex-direction: column;
}

.settings-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.settings-tab:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.08);
}

.settings-tab.active {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.12);
    border-left-color: var(--accent-blue);
}

.settings-tab svg {
    flex-shrink: 0;
}

.settings-content {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

.settings-panel {
    display: none;
    max-width: 560px;
    animation: fadeIn 200ms ease;
}

.settings-panel.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.settings-panel-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.settings-panel-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.settings-section {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.settings-section:last-of-type {
    border-bottom: none;
}

.settings-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.settings-toggle-row {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 12px;
}

/* Toggle Switch */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    margin: 0;
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    display: none;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--border-light);
    border-radius: 12px;
    transition: var(--transition);
    flex-shrink: 0;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-label input:checked+.toggle-switch {
    background: var(--accent-blue);
}

.toggle-label input:checked+.toggle-switch::after {
    left: 23px;
}

.settings-hint {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.6;
}

.settings-actions {
    display: flex;
    gap: 10px;
    margin-top: 24px;
}

/* About Info */
.about-info {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    overflow: hidden;
}

.about-row {
    display: flex;
    justify-content: space-between;
    padding: 14px 20px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.about-row:last-child {
    border-bottom: none;
}

.about-row span:first-child {
    color: var(--text-secondary);
}

.about-row span:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

/* Settings Mobile */
@media (max-width: 768px) {
    .settings-layout {
        flex-direction: column;
        min-height: auto;
    }

    .settings-tabs {
        flex: none;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 0;
        overflow-x: auto;
    }

    .settings-tab {
        border-left: none;
        border-bottom: 3px solid transparent;
        padding: 12px 16px;
        white-space: nowrap;
        font-size: 13px;
    }

    .settings-tab.active {
        border-left-color: transparent;
        border-bottom-color: var(--accent-blue);
    }

    .settings-content {
        padding: 20px 16px;
    }
}

@media (max-width: 380px) {
    .stat-cards {
        grid-template-columns: 1fr;
    }

    .main {
        padding: 56px 12px 12px;
    }
}

/* ===================== */
/*   成员统计卡片         */
/* ===================== */
.member-stat-cards {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.member-stat-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    flex: 1;
    min-width: 0;
}

.member-stat-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
}

.member-stat-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.member-stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.member-stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
}

/* ===================== */
/*   自定义 Combobox       */
/* ===================== */
.custom-combobox {
    position: relative;
}

.custom-combobox input {
    width: 100%;
    padding-right: 36px;
}

.combobox-toggle {
    position: absolute;
    right: 1px;
    top: 1px;
    bottom: 1px;
    width: 34px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: color 0.2s;
}

.combobox-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.combobox-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 100;
    max-height: 200px;
    overflow-y: auto;
}

.custom-combobox.open .combobox-dropdown {
    display: block;
    animation: fadeIn 0.15s ease;
}

.combobox-option {
    padding: 10px 14px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: background 0.15s;
}

.combobox-option:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-blue);
}

.combobox-empty {
    padding: 12px 14px;
    color: var(--text-muted);
    font-size: 13px;
    text-align: center;
}

/* ===================== */
/*   批量分组操作栏        */
/* ===================== */
.batch-assign-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(251, 191, 36, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.batch-assign-bar select {
    min-width: 160px;
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

/* ===================== */
/*   备注列               */
/* ===================== */
.notes-cell {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
    font-size: 13px;
}

/* --- 成员卡片响应式 --- */
@media (max-width: 768px) {
    .member-stat-cards {
        flex-direction: column;
        gap: 10px;
    }

    .batch-assign-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}

/* ===================== */
/*   确认弹窗 + 危险按钮   */
/* ===================== */
.confirm-modal {
    width: 400px;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-family: inherit;
    transition: opacity 0.2s;
}

.btn-danger:hover {
    opacity: 0.85;
}