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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f8f9fa;
            color: #333;
        }

        /* Sidebar */
        .sidebar {
            width: 260px;
            height: 100vh;
            background: linear-gradient(135deg, #2b4162 0%, #2b4162 100%);
            position: fixed;
            left: 0;
            top: 0;
            color: white;
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .sidebar.collapsed {
            width: 70px;
        }

        .sidebar-header {
            padding: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .sidebar-header h3 {
            font-size: 1.5rem;
            margin-bottom: 5px;
            transition: opacity 0.3s ease;
        }

        .sidebar.collapsed .sidebar-header h3 {
            opacity: 0;
        }

        .sidebar-menu {
            list-style: none;
            padding: 20px 0;
        }

        .sidebar-menu li {
            margin-bottom: 5px;
        }

        .sidebar-menu a {
            display: flex;
            align-items: center;
            padding: 15px 20px;
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
            border-radius: 0;
        }

        .sidebar-menu a:hover,
        .sidebar-menu a.active {
            background: rgba(255, 255, 255, 0.1);
            border-right: 4px solid #fff;
        }

        .sidebar-menu i {
            margin-right: 15px;
            width: 20px;
            text-align: center;
        }

        .sidebar.collapsed .sidebar-menu span {
            display: none;
        }

        /* Main Content */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
            transition: margin-left 0.3s ease;
        }

        .main-content.expanded {
            margin-left: 70px;
        }

        /* Header */
        .header {
            background: white;
            padding: 20px 30px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header h1 {
            font-size: 1.8rem;
            color: #333;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary {
            background: linear-gradient(45deg, #2b4162, #2b4162);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
        }

        .btn-secondary {
            background: #6c757d;
            color: white;
        }

        .btn-success {
            background: #28a745;
            color: white;
        }

        .btn-danger {
            background: #dc3545;
            color: white;
        }

        .btn-warning {
            background: #ffc107;
            color: #333;
        }

        /* Content Area */
        .content {
            padding: 30px;
        }

        .page-section {
            display: none;
        }

        .page-section.active {
            display: block;
        }

        /* Dashboard Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-left: 4px solid;
            transition: transform 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
        }

        .stat-card.users {
            border-left-color: #667eea;
        }

        .stat-card.services {
            border-left-color: #28a745;
        }

        .stat-card.revenue {
            border-left-color: #ffc107;
        }

        .stat-card.reports {
            border-left-color: #dc3545;
        }

        .stat-card h3 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            color: #333;
        }

        .stat-card p {
            color: #666;
            font-size: 1rem;
        }

        .stat-card i {
            float: right;
            font-size: 2rem;
            opacity: 0.3;
        }

        /* Tables */
        .table-container {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 30px;
        }

        .table-header {
            padding: 20px 25px;
            background: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .table-header h3 {
            margin: 0;
            color: #333;
        }

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

        th, td {
            padding: 15px 25px;
            text-align: left;
            border-bottom: 1px solid #dee2e6;
        }

        th {
            background: #f8f9fa;
            font-weight: 600;
            color: #333;
        }

        tbody tr:hover {
            background: #f8f9fa;
        }

        .status-badge {
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
        }

        .status-active {
            background: #d4edda;
            color: #155724;
        }

        .status-inactive {
            background: #f8d7da;
            color: #721c24;
        }

        .status-pending {
            background: #fff3cd;
            color: #856404;
        }

        /* Forms */
        .form-container {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 30px;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #333;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: #2b4162;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
        }

        .modal-content {
            background-color: #fefefe;
            margin: 5% auto;
            padding: 0;
            border: none;
            border-radius: 15px;
            width: 90%;
            max-width: 500px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            animation: modalSlide 0.3s ease;
        }

        @keyframes modalSlide {
            from { opacity: 0; transform: translateY(-30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .modal-header {
            padding: 20px 30px;
            background: linear-gradient(45deg, #2b4162, #2b4162);
            color: white;
            border-radius: 15px 15px 0 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-body {
            padding: 30px;
        }

        .close {
            color: white;
            font-size: 24px;
            cursor: pointer;
            background: none;
            border: none;
        }

        /* Action Buttons */
        .action-buttons {
            display: flex;
            gap: 10px;
        }

        .btn-sm {
            padding: 8px 12px;
            font-size: 12px;
        }

        /* Search */
        .search-container {
            position: relative;
            margin-bottom: 20px;
        }

        .search-input {
            width: 300px;
            padding: 10px 15px 10px 40px;
            border: 2px solid #e9ecef;
            border-radius: 25px;
            font-size: 14px;
        }

        .search-input:focus {
            outline: none;
            border-color: #2b4162;
        }

        .search-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #6c757d;
        }

        /* Toggle Switch */
        .toggle {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

        .toggle input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: 0.4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 18px;
            width: 18px;
            left: 3px;
            bottom: 3px;
            background-color: white;
            transition: 0.4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: #2b4162;
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .sidebar {
                width: 70px;
            }
            
            .sidebar.collapsed {
                width: 0;
            }
            
            .main-content {
                margin-left: 70px;
            }
            
            .main-content.expanded {
                margin-left: 0;
            }
            
            .form-row {
                grid-template-columns: 1fr;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .header {
                padding: 15px 20px;
            }
            
            .content {
                padding: 20px;
            }
            
            .search-input {
                width: 100%;
                margin-bottom: 15px;
            }
        }

        /* Charts Container */
        .charts-container {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 20px;
            margin: 20px 0;
        }

        .chart-card {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }

        .chart-card h4 {
            margin-bottom: 20px;
            color: #333;
        }

        @media (max-width: 768px) {
            .charts-container {
                grid-template-columns: 1fr;
            }
        }