:root {
            --primary-color: #2c3e50;
            --secondary-color: #34495e;
            --accent-color: #3498db;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --danger-color: #e74c3c;
            --bg-color: #f8f9fa;
            --text-color: #333;
            --card-bg: #fff;
            --border-color: #e9ecef;
            --input-bg: #fff;
            --input-border: #ced4da;
            --input-text: #495057;
            --table-header-bg: #f8f9fa;
            --table-header-text: #495057;
            --breadcrumb-bg: #e9ecef;
            --breadcrumb-text: #6c757d;
            --progress-bg: #e9ecef;
        }

        [data-theme="dark"] {
            --primary-color: #1a252f;
            --secondary-color: #2c3e50;
            --accent-color: #3498db;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --danger-color: #e74c3c;
            --bg-color: #121212;
            --text-color: #ffffff;
            --card-bg: #1e1e1e;
            --border-color: #404040;
            --input-bg: #2d2d2d;
            --input-border: #404040;
            --input-text: #e0e0e0;
            --table-header-bg: #2c3e50;
            --table-header-text: #ffffff;
            --breadcrumb-bg: #2d2d2d;
            --breadcrumb-text: #b0b0b0;
            --progress-bg: #404040;
        }
        
        body {
            background-color: var(--bg-color);
            color: var(--text-color);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            transition: background-color 0.3s, color 0.3s;
        }
        
        .navbar {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .navbar-brand {
            font-weight: 600;
            font-size: 1.4rem;
        }

        /* Dark mode toggle styles */
        .theme-toggle {
            background: none;
            border: none;
            color: white;
            font-size: 1.2rem;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s;
            margin-left: 15px;
        }

        .theme-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: scale(1.1);
        }
        
        .card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.07);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
        }

        .card-header {
            background-color: var(--card-bg);
            border-bottom: 1px solid var(--border-color);
        }
        
        .stat-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-radius: 15px;
        }
        
        .stat-card.success {
            background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
        }
        
        .stat-card.warning {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
        }
        
        .stat-card.info {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-color), #2980b9);
            border: none;
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 500;
        }
        
        .btn-primary:hover {
            background: linear-gradient(135deg, #2980b9, var(--accent-color));
            transform: translateY(-1px);
        }

        .btn-outline-secondary {
            border-color: var(--border-color);
            color: var(--text-color);
        }

        .btn-outline-secondary:hover {
            background-color: var(--border-color);
            color: var(--card-bg);
        }
        
        .table {
            background-color: var(--card-bg);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0,0,0,0.07);
        }
        
        .table thead th {
            background: var(--table-header-bg);
            color: var(--table-header-text);
            border: none;
            font-weight: 600;
        }

        .table tbody tr {
            background-color: var(--card-bg);
            color: var(--text-color);
        }

        .table tbody tr:hover {
            background-color: var(--border-color);
        }

        .table-sm td, .table-sm th {
            padding: 0.5rem;
        }
        
        .badge {
            font-size: 0.8em;
            padding: 6px 12px;
            border-radius: 20px;
        }
        
        .search-box, .form-control, .form-select {
            background-color: var(--input-bg);
            color: var(--input-text);
            border: 1px solid var(--input-border);
            border-radius: 8px;
            transition: all 0.3s;
        }
        
        .search-box:focus, .form-control:focus, .form-select:focus {
            background-color: var(--input-bg);
            color: var(--input-text);
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
        }

        .form-label {
            color: var(--text-color);
            font-weight: 500;
        }
        
        .pagination .page-link {
            background-color: var(--card-bg);
            color: var(--text-color);
            border-radius: 8px;
            margin: 0 2px;
            border: 1px solid var(--border-color);
        }
        
        .pagination .page-item.active .page-link {
            background: linear-gradient(135deg, var(--accent-color), #2980b9);
            border: none;
        }

        .pagination .page-item.disabled .page-link {
            background-color: var(--border-color);
            color: var(--text-color);
            opacity: 0.6;
        }

        /* Progress bars */
        .progress {
            background-color: var(--progress-bg);
        }

        /* Breadcrumbs */
        .breadcrumb {
            background-color: var(--breadcrumb-bg);
            border-radius: 8px;
        }

        .breadcrumb-item a {
            color: var(--accent-color);
            text-decoration: none;
        }

        .breadcrumb-item.active {
            color: var(--breadcrumb-text);
        }

        /* Dark mode specific adjustments */
        [data-theme="dark"] .text-muted {
            color: #a0a0a0 !important;
        }

        [data-theme="dark"] .border {
            border-color: var(--border-color) !important;
        }

        [data-theme="dark"] .bg-light {
            background-color: var(--card-bg) !important;
        }

        [data-theme="dark"] .table-light {
            background-color: var(--card-bg) !important;
        }

        [data-theme="dark"] .table-light th {
            background-color: var(--table-header-bg) !important;
            color: var(--table-header-text) !important;
        }

        [data-theme="dark"] .table-light td {
            background-color: var(--card-bg) !important;
            color: var(--text-color) !important;
        }

        /* Form select dropdowns in dark mode */
        [data-theme="dark"] .form-select option {
            background-color: var(--input-bg);
            color: var(--input-text);
        }

        /* Links in dark mode */
        [data-theme="dark"] a {
            color: var(--accent-color);
        }

        [data-theme="dark"] a:hover {
            color: #2980b9;
        }

        /* Text colors in dark mode */
        [data-theme="dark"] .text-primary {
            color: var(--accent-color) !important;
        }

        [data-theme="dark"] .text-success {
            color: var(--success-color) !important;
        }

        [data-theme="dark"] .text-warning {
            color: var(--warning-color) !important;
        }

        [data-theme="dark"] .text-info {
            color: var(--accent-color) !important;
        }

        [data-theme="dark"] .text-danger {
            color: var(--danger-color) !important;
        }

        /* Small text in dark mode */
        [data-theme="dark"] .small {
            color: #b0b0b0;
        }

        /* Hover effects for cards in dark mode */
        [data-theme="dark"] .card:hover {
            box-shadow: 0 8px 25px rgba(0,0,0,0.3);
        }

        /* Table hover in dark mode */
        [data-theme="dark"] .table-hover tbody tr:hover {
            background-color: #2a2a2a !important;
        }