* {
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f5f5f5;
        }
        .container {
            display: flex;
            min-height: 100vh;
        }
        /* Sidebar styles */
        .sidebar {
            width: 250px;
            background-color: #2c3e50;
            color: white;
            padding: 20px 0;
            position: fixed;
            height: 100vh;
            overflow-y: auto;
        }
        .sidebar-header {
            padding: 0 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 20px;
        }
        .sidebar-header h3 {
            margin: 0;
            color: #ecf0f1;
        }
        .sidebar-menu {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-menu li {
            margin-bottom: 5px;
        }
        .sidebar-menu a {
            display: block;
            padding: 12px 20px;
            color: #ecf0f1;
            text-decoration: none;
            transition: background-color 0.3s;
        }
        .sidebar-menu a.active {
            background-color: #34495e;
            border-left: 4px solid #3498db;
        }
        .sidebar-menu a:hover {
            background-color: #34495e;
        }
        .sidebar-menu i {
            margin-right: 10px;
        }
        /* Main content styles */
        .content {
            flex: 1;
            padding: 20px;
            margin-left: 250px;
            width: calc(100% - 250px);
        }
        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            background-color: white;
            padding: 15px 20px;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        .page-header h1 {
            margin: 0;
            font-size: 24px;
            color: #2c3e50;
        }
        /* Form styles */
        .form-container, .search-container, .table-responsive {
            background-color: white;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
        }
        .form-row {
            display: flex;
            gap: 20px;
            margin-bottom: 15px;
        }
        .form-group {
            flex: 1;
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #333;
        }
        input, select, .search-container input, .search-container select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }
        .form-actions, .actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }
        .btn, .search-container button {
            padding: 10px 15px;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            text-align: center;
        }
        .btn-primary, .search-container button {
            background-color: #3498db;
            color: white;
        }
        .btn-secondary {
            background-color: #7f8c8d;
            color: white;
        }
        .btn-danger {
            background-color: #e74c3c;
            color: white;
        }
        .btn:hover, .search-container button:hover {
            opacity: 0.9;
        }
        /* Table styles */
        table {
            width: 100%;
            border-collapse: collapse;
        }
        table th, table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #e0e0e0;
        }
        table th {
            background-color: #f8f9fa;
            font-weight: bold;
            color: #2c3e50;
        }
        table tr:last-child td {
            border-bottom: none;
        }
        table tr:hover {
            background-color: #f5f5f5;
        }
        /* Pagination styles */
        .pagination {
            display: flex;
            justify-content: center;
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }
        .pagination li {
            margin: 0 5px;
        }
        .pagination a, .pagination span {
            display: block;
            padding: 8px 12px;
            text-decoration: none;
            border: 1px solid #ddd;
            border-radius: 4px;
            color: #333;
        }
        .pagination .active a {
            background-color: #3498db;
            color: white;
            border-color: #3498db;
        }
        .pagination a:hover:not(.active) {
            background-color: #f5f5f5;
        }
        /* Alert messages */
        .alert {
            padding: 15px;
            margin-bottom: 20px;
            border-radius: 4px;
        }
        .alert-success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        .alert-danger {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        /* Responsive adjustments */
        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
            }
            .content {
                margin-left: 0;
                width: 100%;
            }
            .form-row, .search-container, .actions {
                flex-direction: column;
                gap: 0;
            }
        }