/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables */
:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    
    /* Dark Theme */
    --sidebar-bg: #0f172a;
    --sidebar-hover: #1e293b;
    --sidebar-active: #2563eb;
    --navbar-bg: #ffffff;
    --navbar-border: #e2e8f0;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    /* Borders */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
}

/* Layout Container */
.admin-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    overflow-y: auto;
    overflow-x: hidden;
}

.admin-sidebar.collapsed {
    width: 80px;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: white;
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.sidebar-text {
    transition: var(--transition);
    white-space: nowrap;
}

.admin-sidebar.collapsed .sidebar-text {
    opacity: 0;
    visibility: hidden;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: white;
}

.nav-link.active {
    background: var(--sidebar-active);
    color: white;
}

.nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.nav-text {
    transition: var(--transition);
}

.admin-sidebar.collapsed .nav-text {
    opacity: 0;
    visibility: hidden;
}

/* Main Content Area */
.admin-body {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.admin-sidebar.collapsed + .admin-body {
    margin-left: 80px;
}

/* Header */
.admin-header {
    background: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.admin-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.welcome-text {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.last-login {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.header-nav {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.nav-link-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Main Content */
.admin-main {
    flex: 1;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    min-height: calc(100vh - 73px);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-description {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

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

.stat-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stat-info h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-change {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--danger);
}

.stat-change.neutral {
    color: var(--text-muted);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
}

/* Dashboard Grid Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.dashboard-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    overflow: hidden;
}

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

.card-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-action {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.card-action:hover {
    color: var(--primary-dark);
}

.card-content {
    padding: var(--spacing-xl);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* Lists */
.user-list, .level-list, .activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.user-item, .level-item, .activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.user-item:hover, .level-item:hover {
    background: var(--bg-secondary);
}

.user-avatar, .level-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: white;
    flex-shrink: 0;
}

.user-avatar {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}

.level-icon {
    background: linear-gradient(135deg, var(--success), #059669);
}

.user-info, .level-info {
    flex: 1;
    min-width: 0;
}

.user-name, .level-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email, .level-description {
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-stats, .level-stats {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.user-level, .level-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.user-coins, .play-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Quick Actions */
.quick-actions {
    margin-top: var(--spacing-2xl);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.action-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.action-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.action-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.action-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.action-description {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Footer */
.admin-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-left p, .footer-right p {
    margin: 0;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 var(--spacing-sm);
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--border);
}

.btn-success {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
    background: #059669;
    border-color: #059669;
}

.btn-danger {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    border-color: #dc2626;
}

.btn-warning {
    background: var(--warning);
    color: white;
    border-color: var(--warning);
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
    border-color: #d97706;
}

.btn-info {
    background: var(--info);
    color: white;
    border-color: var(--info);
}

.btn-info:hover:not(:disabled) {
    background: #0891b2;
    border-color: #0891b2;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--bg-primary);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Search */
.search-section {
    margin-bottom: var(--spacing-xl);
}

.search-form {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.search-input-group {
    display: flex;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 300px;
}

.search-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: var(--bg-primary);
    transition: var(--transition);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Tables */
.table-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    overflow: hidden;
}

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

.data-table th {
    background: var(--bg-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    font-size: 0.875rem;
    vertical-align: middle;
}

.data-table tr:hover {
    background: var(--bg-secondary);
}

/* Levels Table Specific */
.levels-table th {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.levels-table td {
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Table Content Styling */
.level-number .level-badge {
    font-size: 0.875rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
}

.level-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.level-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-top: var(--spacing-xs);
}

.difficulty-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.config-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.config-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 600;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 600;
}

.rate-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Action Buttons in Table */
.action-buttons .btn-sm {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    min-width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-buttons .btn-sm .btn-icon {
    font-size: 0.875rem;
}

/* Pagination */
.pagination {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.btn-pagination {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition);
}

.btn-pagination:hover {
    background: var(--bg-secondary);
    border-color: var(--border);
}

.btn-pagination.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Alerts */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border-color: #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-color: #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-color: #fed7aa;
}

.alert-info {
    background: #f0fdfa;
    color: #155e75;
    border-color: #99f6e4;
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-text {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

.badge-primary {
    background: var(--primary);
    color: white;
}

.badge-success {
    background: var(--success);
    color: white;
}

.badge-danger {
    background: var(--danger);
    color: white;
}

.badge-warning {
    background: var(--warning);
    color: white;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.active {
    background: #dcfce7;
    color: #166534;
}

.status-badge.inactive {
    background: #f1f5f9;
    color: #475569;
}

.status-badge.playing {
    background: #dbeafe;
    color: #1e40af;
}

.status-badge.won {
    background: #dcfce7;
    color: #166534;
}

.status-badge.lost {
    background: #fef2f2;
    color: #991b1b;
}

.status-badge.quit {
    background: #f3f4f6;
    color: #374151;
}

/* Difficulty Badges */
.difficulty-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.difficulty-easy {
    background: #dcfce7;
    color: #166534;
}

.difficulty-medium {
    background: #fef3c7;
    color: #92400e;
}

.difficulty-hard {
    background: #fecaca;
    color: #991b1b;
}

.difficulty-expert {
    background: #e9d5ff;
    color: #6b21a8;
}

/* Toggle Switch */
.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
}

.toggle-input {
    display: none;
}

.toggle-slider {
    width: 48px;
    height: 24px;
    background: var(--border);
    border-radius: 12px;
    position: relative;
    transition: var(--transition);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.toggle-input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.toggle-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-large {
    max-width: 800px;
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Level Configuration */
.level-config {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.config-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.config-label {
    color: var(--text-muted);
    font-weight: 500;
}

.config-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Level Statistics */
.level-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Completion Rate */
.completion-rate {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.rate-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.rate-fill {
    height: 100%;
    transition: width 0.3s ease;
}

.rate-fill.rate-high {
    background: var(--success);
}

.rate-fill.rate-medium {
    background: var(--warning);
}

.rate-fill.rate-low {
    background: var(--danger);
}

.rate-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

/* Level Badges */
.level-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Level Info */
.level-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.level-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.level-description {
    color: var(--text-muted);
    font-size: 0.75rem;
    line-height: 1.4;
}

/* Level Number */
.level-number {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Table Stats */
.table-stats {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-item .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-item .stat-value {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

/* Search Filters */
.search-filters {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.search-input-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

/* Table Header */
.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.table-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.table-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition);
}

/* Responsive Design */
@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .admin-body {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .actions-grid {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-input-group {
        min-width: auto;
    }
    
    .data-table {
        font-size: 0.75rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .table-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .table-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

/* Debug Notice */
.debug-notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--warning);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.slide-in {
    animation: slideIn 0.3s ease-in-out;
}

/* Print Styles */
@media print {
    .admin-sidebar,
    .admin-header,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .admin-body {
        margin-left: 0 !important;
    }
    
    .admin-main {
        padding: 0 !important;
        background: white !important;
    }
}