/* NovaNav 管理后台 */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #0c0c14;
    --bg-elevated: #12121f;
    --bg-card: #18182a;
    --bg-hover: #22223a;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.12);
    --text: #f1f1f5;
    --text-secondary: rgba(255, 255, 255, 0.62);
    --text-muted: rgba(255, 255, 255, 0.38);
    --sidebar-width: 252px;
    --sidebar-collapsed: 72px;
    --topbar-height: 68px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    --transition: 0.2s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ===== 登录页 ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.login-bg {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(99, 102, 241, 0.18), transparent),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(236, 72, 153, 0.12), transparent),
        linear-gradient(160deg, #0c0c14, #141428, #0f1528);
    z-index: 0;
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 44px 40px;
    background: rgba(24, 24, 42, 0.85);
    backdrop-filter: blur(24px);
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    box-shadow: var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

.login-logo {
    text-align: center;
    margin-bottom: 36px;
}

.logo-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-logo p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.alert-error {
    margin-bottom: 20px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #fca5a5;
    font-size: 0.875rem;
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 24px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: var(--transition);
}

.back-link:hover { color: var(--primary-light); }

/* ===== 布局 ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 90;
    opacity: 0;
    transition: opacity var(--transition);
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-elevated);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: width var(--transition), transform var(--transition);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar.collapsed .sidebar-brand,
.sidebar.collapsed .nav-group-label,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-item .badge,
.sidebar.collapsed .sidebar-collapse-btn svg {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 16px 12px;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .sidebar-collapse-btn svg {
    transform: rotate(180deg);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-header .logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    font-size: 1rem;
    margin-bottom: 0;
    flex-shrink: 0;
}

.sidebar-brand {
    flex: 1;
    min-width: 0;
    transition: opacity var(--transition);
}

.brand-name {
    display: block;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.2;
}

.brand-sub {
    display: block;
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 1px;
}

.sidebar-collapse-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: var(--transition);
    flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.sidebar-collapse-btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition);
}

@media (min-width: 1024px) {
    .sidebar-collapse-btn { display: flex; }
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-group {
    margin-bottom: 20px;
}

.nav-group-label {
    display: block;
    padding: 0 12px 8px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    transition: opacity var(--transition);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
    position: relative;
    white-space: nowrap;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.nav-item span {
    transition: opacity var(--transition);
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 0 3px 3px 0;
}

.nav-item-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.nav-item .badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
    transition: opacity var(--transition);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition);
}

body.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed);
}

/* ===== 顶栏 ===== */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 28px;
    height: var(--topbar-height);
    border-bottom: 1px solid var(--border);
    background: rgba(18, 18, 31, 0.75);
    backdrop-filter: blur(16px);
    position: sticky;
    top: 0;
    z-index: 50;
    flex-shrink: 0;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

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

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.icon-btn.spinning svg {
    animation: spin 0.6s linear;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.menu-toggle { display: none; }

.page-heading {
    min-width: 0;
}

.page-title {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.3;
}

.page-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px 6px 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
}

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
}

.user-name {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.content-area {
    flex: 1;
    padding: 28px;
    max-width: 1400px;
    width: 100%;
}

/* ===== 加载状态 ===== */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 80px 20px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-strong);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

/* ===== 页面工具栏 ===== */
.page-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 360px;
}

.search-box svg {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 9px 14px 9px 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

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

.filter-select {
    padding: 9px 32px 9px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.4)' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.filter-select:focus {
    border-color: var(--primary-light);
}

.toolbar-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-left: auto;
}

/* ===== 卡片 ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card:last-child { margin-bottom: 0; }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.card-header .card-subtitle {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 400;
}

.card-header-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== 统计卡片 ===== */
.stats-grid {
    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: var(--transition);
    cursor: default;
}

.stat-card.clickable {
    cursor: pointer;
}

.stat-card.clickable:hover {
    border-color: var(--border-strong);
    background: var(--bg-hover);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg { width: 22px; height: 22px; }

.stat-icon.purple { background: rgba(99, 102, 241, 0.15); color: var(--primary-light); }
.stat-icon.pink { background: rgba(236, 72, 153, 0.15); color: var(--accent); }
.stat-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.stat-icon.orange { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.stat-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

.stat-info h4 {
    font-size: 1.625rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-info p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* ===== 快捷操作 ===== */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 18px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.quick-action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-strong);
    color: var(--text);
    transform: translateY(-2px);
}

.quick-action-btn svg {
    width: 22px;
    height: 22px;
    color: var(--primary-light);
}

.quick-action-btn .qa-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--danger);
    color: #fff;
    font-size: 0.625rem;
    padding: 2px 6px;
    border-radius: 8px;
    font-weight: 600;
}

.quick-action-btn { position: relative; }

/* ===== 双栏布局 ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ===== 表格 ===== */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

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

th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: rgba(255, 255, 255, 0.02);
    position: sticky;
    top: 0;
}

tbody tr {
    transition: background var(--transition);
}

tbody tr:hover td {
    background: rgba(255, 255, 255, 0.025);
}

.table-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
    vertical-align: middle;
    background: var(--bg);
}

.table-icon-emoji {
    font-size: 1.25rem;
    line-height: 1;
}

.table-icon-svg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--text-secondary);
}

.table-icon-svg svg {
    width: 18px;
    height: 18px;
}

.icon-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.icon-picker-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.icon-picker-item svg {
    width: 18px;
    height: 18px;
}

.icon-picker-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
}

.icon-picker-item.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.12);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.table-url {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.table-actions {
    display: flex;
    gap: 6px;
    flex-wrap: nowrap;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
    white-space: nowrap;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: #fff;
    border: 1px solid transparent;
}

.btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

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

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text);
    border-color: var(--border-strong);
}

.btn-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
    background: rgba(16, 185, 129, 0.25);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.12);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.22);
}

.btn-sm { padding: 5px 10px; font-size: 0.75rem; }
.btn-block { width: 100%; padding: 12px; }

.btn-icon-only {
    padding: 6px;
    min-width: 32px;
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 7px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.form-group select option { background: var(--bg-card); }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-tip {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.form-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.form-section-title:first-child { margin-top: 0; }

.icon-fetch-status {
    font-size: 0.75rem;
    margin: -8px 0 14px;
    padding: 0 2px;
}

.icon-fetch-status.loading { color: var(--text-muted); }
.icon-fetch-status.success { color: var(--success); }
.icon-fetch-status.error { color: var(--danger); }

.icon-preview {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
    background: var(--bg);
    border: 1px solid var(--border);
}

/* ===== 壁纸 ===== */
.wallpaper-admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.wp-admin-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg);
    transition: var(--transition);
}

.wp-admin-item:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}

.wp-admin-item.is-default {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

.wp-admin-item img,
.wp-admin-item video {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    display: block;
}

.wp-default-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 6px;
}

.wp-admin-info {
    padding: 12px;
}

.wp-admin-info h4 {
    font-size: 0.875rem;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.wp-admin-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.wp-admin-actions {
    display: flex;
    gap: 6px;
    padding: 0 12px 12px;
}

.upload-zone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.01);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-light);
    background: rgba(99, 102, 241, 0.06);
}

.upload-zone svg {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.upload-zone p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.upload-zone .tip {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ===== 模态框 ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    padding: 28px;
    transform: translateY(16px) scale(0.98);
    transition: transform var(--transition);
    box-shadow: var(--shadow);
}

.modal.show .modal-content {
    transform: translateY(0) scale(1);
}

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

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-hover);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* ===== 状态标签 ===== */
.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.active { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.status-badge.inactive { background: rgba(239, 68, 68, 0.12); color: var(--danger); }

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 0.875rem;
    animation: toastIn 0.3s ease;
    box-shadow: var(--shadow);
    pointer-events: auto;
    max-width: 360px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== 空状态 ===== */
.empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state {
    text-align: center;
    padding: 56px 24px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.empty-state p {
    font-size: 0.875rem;
    margin-bottom: 20px;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px;
    width: fit-content;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 8px 18px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.tab-btn.active {
    color: #fff;
    background: var(--primary);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== 设置页分栏 ===== */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

/* ===== 提醒横幅 ===== */
.alert-banner {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 0.875rem;
    color: var(--warning);
}

.alert-banner svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.alert-banner .alert-action {
    margin-left: auto;
    color: var(--warning);
    font-weight: 500;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 0.875rem;
    text-decoration: underline;
    white-space: nowrap;
}

.alert-banner .alert-action:hover {
    filter: brightness(1.2);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
    }

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

    .sidebar.collapsed .sidebar-brand,
    .sidebar.collapsed .nav-group-label,
    .sidebar.collapsed .nav-item span,
    .sidebar.collapsed .nav-item .badge {
        opacity: 1;
        width: auto;
    }

    .main-content,
    body.sidebar-collapsed .main-content {
        margin-left: 0;
    }

    .menu-toggle { display: flex; }

    .sidebar-collapse-btn { display: none !important; }

    .topbar {
        padding: 0 16px;
        height: auto;
        min-height: 60px;
        padding-top: 12px;
        padding-bottom: 12px;
    }

    .page-desc { display: none; }

    .content-area { padding: 16px; }

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

    .stats-grid { grid-template-columns: 1fr 1fr; }

    .user-name { display: none; }

    .page-toolbar { flex-direction: column; align-items: stretch; }

    .search-box { max-width: none; }

    .toolbar-meta { margin-left: 0; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}