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

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

        /* Admin Wrapper */
        .admin-wrapper {
            display: flex;
            min-height: calc(100vh - 120px);
        }

        /* Sidebar */
        .admin-sidebar {
            width: 250px;
            background-color: #ffffff;
            border-right: 1px solid #dee2e6;
            padding: 20px 0;
            position: sticky;
            top: 0;
            height: calc(100vh - 60px);
            overflow-y: auto;
        }

        .sidebar-header {
            padding: 0 20px 20px 20px;
            border-bottom: 1px solid #dee2e6;
            margin-bottom: 20px;
        }

        .sidebar-header h5 {
            color: #007bff;
            font-weight: 600;
            margin: 0;
        }

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

        .menu-category {
            padding: 10px 20px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            color: #6c757d;
            letter-spacing: 0.5px;
            margin-top: 15px;
        }

        .menu-category:first-child {
            margin-top: 0;
        }

        .sidebar-menu a {
            display: flex;
            align-items: center;
            padding: 12px 20px;
            color: #495057;
            text-decoration: none;
            transition: all 0.3s ease;
            border-left: 3px solid transparent;
        }

        .sidebar-menu a:hover {
            background-color: rgba(0, 123, 255, 0.05);
            border-left-color: #007bff;
            color: #007bff;
        }

        .sidebar-menu a.active {
            background-color: rgba(0, 123, 255, 0.1);
            border-left-color: #007bff;
            color: #007bff;
            font-weight: 500;
        }

        .sidebar-menu a i {
            margin-right: 10px;
            font-size: 1.1rem;
            width: 20px;
            text-align: center;
        }

        /* Collapsible Menu */
        .menu-collapse {
            cursor: pointer;
            position: relative;
        }

        .menu-collapse::after {
            content: '\F282';
            font-family: 'bootstrap-icons';
            position: absolute;
            right: 20px;
            transition: transform 0.3s ease;
        }

        .menu-collapse.collapsed::after {
            transform: rotate(-90deg);
        }

        .submenu {
            list-style: none;
            padding-left: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .submenu.show {
            max-height: 500px;
        }

        .submenu a {
            padding-left: 50px;
            font-size: 0.9rem;
        }

        /* Admin Content */
        .admin-content {
            flex: 1;
            padding: 30px;
            overflow-y: auto;
        }

        .content-header {
            margin-bottom: 30px;
        }

        .content-header h2 {
            color: #212529;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .content-header p {
            color: #6c757d;
            margin: 0;
        }

        /* Stats Cards */
        .stats-row {
            margin-bottom: 30px;
        }

        .stat-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 10px;
            padding: 20px;
            color: white;
            margin-bottom: 15px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .stat-card.blue {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .stat-card.green {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
        }

        .stat-card.orange {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        }

        .stat-card.red {
            background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
        }

        .stat-card i {
            font-size: 2.5rem;
            opacity: 0.8;
            margin-bottom: 10px;
        }

        .stat-card h3 {
            font-size: 2rem;
            font-weight: 700;
            margin: 10px 0 5px 0;
        }

        .stat-card p {
            margin: 0;
            opacity: 0.9;
            font-size: 0.9rem;
        }

        /* Main Cards */
        .main-card {
            background: white;
            border-radius: 10px;
            border: 1px solid #e9ecef;
            transition: all 0.3s ease;
            height: 100%;
            margin-bottom: 20px;
        }

        .main-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 123, 255, 0.1);
        }

        .main-card .card-body {
            padding: 25px;
            text-align: center;
        }

        .main-card i {
            font-size: 3rem;
            color: rgba(0, 123, 255, 0.7);
            margin-bottom: 15px;
        }

        .main-card h5 {
            font-weight: 600;
            color: #212529;
            margin-bottom: 10px;
        }

        .main-card p {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

        .main-card .btn {
            border-radius: 5px;
            padding: 10px 25px;
            font-weight: 500;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .admin-wrapper {
                flex-direction: column;
            }

            .admin-sidebar {
                width: 100%;
                height: auto;
                position: relative;
                border-right: none;
                border-bottom: 1px solid #dee2e6;
            }

            .admin-content {
                padding: 15px;
            }

            .stat-card h3 {
                font-size: 1.5rem;
            }
        }