/* ============================================================
   卡密验证后台 — 统一设计系统（多主题）
   主题：business | dark | minimal
   ============================================================ */

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

/* ---- 商务蓝（默认） ---- */
[data-theme="business"] {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-dark: #1d4ed8;
    --primary-soft: rgba(37, 99, 235, 0.1);
    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);

    --bg: #f1f5f9;
    --bg-elevated: #ffffff;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e2e8f0;
    --topbar-bg: rgba(255, 255, 255, 0.92);

    --text: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --border: #e2e8f0;
    --border-light: #f1f5f9;

    --hover: #f8fafc;
    --active: rgba(37, 99, 235, 0.08);

    --input-bg: #ffffff;
    --input-border: #cbd5e1;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.1);

    --success: #059669;
    --success-bg: #ecfdf5;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --info: #2563eb;
    --info-bg: #eff6ff;

    --sidebar-header-bg: var(--primary-gradient);
    --sidebar-header-text: #ffffff;
    --overlay: rgba(15, 23, 42, 0.45);
    --table-stripe: #f8fafc;
    --table-hover: #f1f5f9;
    --modal-bg: #ffffff;
}

/* ---- 科技暗 ---- */
[data-theme="dark"] {
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --primary-dark: #818cf8;
    --primary-soft: rgba(99, 102, 241, 0.15);
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

    --bg: #0f172a;
    --bg-elevated: #1e293b;
    --sidebar-bg: #1e293b;
    --sidebar-border: #334155;
    --topbar-bg: rgba(30, 41, 59, 0.95);

    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border: #334155;
    --border-light: #1e293b;

    --hover: #334155;
    --active: rgba(99, 102, 241, 0.15);

    --input-bg: #0f172a;
    --input-border: #475569;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);

    --success: #34d399;
    --success-bg: rgba(52, 211, 153, 0.12);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.12);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.12);
    --info: #60a5fa;
    --info-bg: rgba(96, 165, 250, 0.12);

    --sidebar-header-bg: linear-gradient(135deg, #312e81 0%, #4c1d95 100%);
    --sidebar-header-text: #ffffff;
    --overlay: rgba(0, 0, 0, 0.65);
    --table-stripe: rgba(15, 23, 42, 0.5);
    --table-hover: #334155;
    --modal-bg: #1e293b;
}

/* ---- 轻量白 ---- */
[data-theme="minimal"] {
    --primary: #18181b;
    --primary-hover: #27272a;
    --primary-dark: #27272a;
    --primary-soft: rgba(24, 24, 27, 0.06);
    --primary-gradient: linear-gradient(135deg, #27272a 0%, #18181b 100%);

    --bg: #fafafa;
    --bg-elevated: #ffffff;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e4e4e7;
    --topbar-bg: rgba(255, 255, 255, 0.96);

    --text: #18181b;
    --text-secondary: #71717a;
    --text-muted: #a1a1aa;

    --border: #e4e4e7;
    --border-light: #f4f4f5;

    --hover: #f4f4f5;
    --active: rgba(24, 24, 27, 0.05);

    --input-bg: #ffffff;
    --input-border: #d4d4d8;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

    --success: #16a34a;
    --success-bg: #f0fdf4;
    --warning: #ca8a04;
    --warning-bg: #fefce8;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --info: #2563eb;
    --info-bg: #eff6ff;

    --sidebar-header-bg: #ffffff;
    --sidebar-header-text: #18181b;
    --overlay: rgba(24, 24, 27, 0.35);
    --table-stripe: #fafafa;
    --table-hover: #f4f4f5;
    --modal-bg: #ffffff;
}

/* ---- 基础重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* ---- 布局框架 ---- */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 252px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s ease;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed { width: 68px; }

.sidebar-header {
    padding: 1rem 1.125rem;
    background: var(--sidebar-header-bg);
    color: var(--sidebar-header-text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    min-height: 60px;
    flex-shrink: 0;
    border-bottom: 1px solid transparent;
}

[data-theme="minimal"] .sidebar-header {
    border-bottom-color: var(--border);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    min-width: 0;
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    flex-shrink: 0;
}

[data-theme="minimal"] .sidebar-brand-icon {
    background: var(--primary);
    color: #fff;
}

.sidebar-header h1 {
    font-size: 0.9375rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.sidebar.collapsed .sidebar-header h1,
.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .nav-group-label,
.sidebar.collapsed .nav-item span { display: none; }

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: inherit;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s;
}

[data-theme="minimal"] .sidebar-toggle {
    background: var(--hover);
    color: var(--text-secondary);
}

.sidebar-toggle:hover { background: rgba(255, 255, 255, 0.25); }
.sidebar.collapsed .sidebar-toggle i { transform: rotate(180deg); }

.nav-menu {
    padding: 0.75rem 0.625rem 1.5rem;
    flex: 1;
}

.nav-group-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    padding: 0.875rem 0.75rem 0.375rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    margin-bottom: 2px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s ease;
    text-decoration: none;
    border-left: none;
}

.nav-item i {
    width: 18px;
    text-align: center;
    font-size: 0.9375rem;
    flex-shrink: 0;
}

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

.nav-item.active {
    background: var(--active);
    color: var(--primary);
    font-weight: 600;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.625rem;
}

.sidebar-footer {
    padding: 0.75rem 0.625rem;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    margin-left: 252px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed ~ .main-content { margin-left: 68px; }

.top-nav {
    background: var(--topbar-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;
}

.top-nav-left,
.top-nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.125rem;
    cursor: pointer;
    padding: 0.375rem;
    border-radius: 6px;
}

.menu-toggle:hover { background: var(--hover); }

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.8125rem;
    pointer-events: none;
}

.search-box input {
    width: 240px;
    padding: 0.4375rem 0.875rem 0.4375rem 2.125rem;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text);
    font-size: 0.8125rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}

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

/* 主题切换器 */
.theme-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px;
    background: var(--hover);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.theme-btn {
    width: 28px;
    height: 28px;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.theme-btn:hover { transform: scale(1.08); }

.theme-btn.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-soft);
}

.theme-btn[data-theme-pick="business"] { background: linear-gradient(135deg, #2563eb, #1d4ed8); }
.theme-btn[data-theme-pick="dark"] { background: linear-gradient(135deg, #1e293b, #6366f1); }
.theme-btn[data-theme-pick="minimal"] { background: linear-gradient(135deg, #fafafa, #18181b); }

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.375rem 0.5rem 0.375rem 0.375rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
}

.user-profile:hover { background: var(--hover); }

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.user-info { line-height: 1.3; }

.user-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
}

.user-role {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    padding: 0.375rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.15s ease;
    z-index: 200;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    color: var(--text);
    font-size: 0.8125rem;
    text-decoration: none;
    transition: background 0.12s;
}

.dropdown-item:hover { background: var(--hover); color: var(--text); }
.dropdown-item.danger { color: var(--danger); }
.dropdown-item.danger:hover { background: var(--danger-bg); }
.dropdown-divider { height: 1px; background: var(--border); margin: 0.25rem 0; }

.content {
    padding: 1.5rem;
    flex: 1;
}

/* ---- 页面元素 ---- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }

.page-header { margin-bottom: 1.5rem; }

.page-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ---- 卡片 ---- */
.card,
.chart-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.25rem;
}

.card h2,
.chart-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
}

.chart-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.chart-card.full-width { grid-column: 1 / -1; }

.chart-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

/* ---- 统计卡片 ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s, transform 0.15s;
}

.stat-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.stat-card-title {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.stat-card-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.stat-card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-card-trend {
    font-size: 0.75rem;
    margin-top: 0.375rem;
    color: var(--text-muted);
}

.stat-card-trend.trend-up { color: var(--success); }
.stat-card-trend.trend-down { color: var(--danger); }

/* ---- 表单 ---- */
.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.form-group {
    flex: 1;
    min-width: 180px;
}

.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text);
    font-size: 0.875rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}

/* ---- 按钮 ---- */
.btn,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    line-height: 1.4;
    background: var(--primary);
    color: #fff;
}

.btn:hover,
.button:hover {
    background: var(--primary-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary {
    background: var(--hover);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--border); color: var(--text); }

/* ---- 表格 ---- */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 10px;
}

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

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.8125rem;
}

th {
    background: var(--hover);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 5;
    font-size: 0.75rem;
    text-transform: none;
    letter-spacing: 0;
}

th a {
    color: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

th a:hover { color: var(--primary); }

tr:nth-child(even) { background: var(--table-stripe); }
tr:hover { background: var(--table-hover); }
tr.selected { background: var(--primary-soft) !important; }

/* ---- 状态徽章 ---- */
.badge,
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.5rem;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 1.4;
}

.badge-success, .status-unused { background: var(--success-bg); color: var(--success); }
.badge-warning, .status-used { background: var(--info-bg); color: var(--info); }
.badge-danger, .status-disabled { background: var(--danger-bg); color: var(--danger); }

/* ---- 提示消息 ---- */
.alert,
.message {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.alert-success, .message.success {
    background: var(--success-bg);
    color: var(--success);
    border-color: rgba(5, 150, 105, 0.2);
}

.alert-error, .message.error {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: rgba(220, 38, 38, 0.2);
}

.alert-warning, .message.warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.alert-info, .message.info {
    background: var(--info-bg);
    color: var(--info);
}

/* ---- 主题选择卡片（设置页） ---- */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.theme-card {
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-elevated);
}

.theme-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.theme-card.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}

.theme-preview {
    height: 72px;
    border-radius: 8px;
    margin-bottom: 0.875rem;
    display: flex;
    overflow: hidden;
    border: 1px solid var(--border);
}

.theme-preview-sidebar {
    width: 28%;
    height: 100%;
}

.theme-preview-main {
    flex: 1;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.theme-preview-bar {
    height: 8px;
    border-radius: 2px;
    opacity: 0.6;
}

.theme-preview-block {
    flex: 1;
    border-radius: 3px;
    opacity: 0.3;
}

.theme-card-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.theme-card-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.theme-card-badge {
    margin-top: 0.75rem;
    padding: 0.375rem;
    background: var(--primary);
    color: #fff;
    border-radius: 6px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.theme-card-btn {
    margin-top: 0.75rem;
    width: 100%;
    padding: 0.4375rem;
    background: var(--hover);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.15s;
}

.theme-card-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ---- 分页 ---- */
.pagination {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 0.5rem;
    border-radius: 6px;
    font-size: 0.8125rem;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.12s;
}

.pagination a:hover {
    background: var(--hover);
    color: var(--primary);
    border-color: var(--primary);
}

.pagination span.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.pagination span.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ---- 遮罩层 ---- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--overlay);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.25s;
}

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

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .chart-container { grid-template-columns: 1fr; }
    .search-box input { width: 180px; }
}

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

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

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

    .menu-toggle { display: flex; }

    .theme-switcher { display: none; }

    .user-info { display: none; }

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

    .content { padding: 1rem; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .search-box { display: none; }
}