:root {
            --primary: #4361ee;
            --secondary: #3f37c9;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #f8961e;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --light-gray: #e9ecef;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f7fb;
            color: var(--dark);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Styles */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
        }

        .logo i {
            font-size: 1.8rem;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }

        nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: color 0.3s;
            padding: 5px 10px;
            border-radius: 4px;
        }

        nav a:hover, nav a.active {
            color: var(--primary);
            background-color: rgba(67, 97, 238, 0.1);
        }

        .user-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            padding: 8px 16px;
            border-radius: 6px;
            border: none;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .btn-primary:hover {
            background-color: var(--secondary);
        }

        .btn-outline {
            background-color: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background-color: rgba(67, 97, 238, 0.1);
        }

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

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

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

        /* Main Content Styles */
        .main-content {
            padding: 30px 0;
            min-height: calc(100vh - 150px);
        }

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

        .card {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            padding: 20px;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .card-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--dark);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }

        .bg-primary {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }

        .bg-success {
            background-color: rgba(76, 201, 240, 0.1);
            color: var(--success);
        }

        .bg-warning {
            background-color: rgba(248, 150, 30, 0.1);
            color: var(--warning);
        }

        .bg-danger {
            background-color: rgba(247, 37, 133, 0.1);
            color: var(--danger);
        }

        .card-value {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .card-text {
            color: var(--gray);
            font-size: 0.9rem;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .table-container {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            overflow: hidden;
            margin-bottom: 30px;
        }

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

        thead {
            background-color: var(--light);
        }

        th, td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid var(--light-gray);
        }

        th {
            font-weight: 600;
            color: var(--dark);
        }

        .status {
            padding: 5px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .status-pending {
            background-color: rgba(248, 150, 30, 0.1);
            color: var(--warning);
        }

        .status-approved {
            background-color: rgba(76, 201, 240, 0.1);
            color: var(--success);
        }

        .status-rejected {
            background-color: rgba(247, 37, 133, 0.1);
            color: var(--danger);
        }

        .action-buttons {
            display: flex;
            gap: 10px;
        }

        .action-btn {
            padding: 5px 10px;
            border-radius: 4px;
            border: none;
            cursor: pointer;
            font-size: 0.8rem;
            transition: all 0.3s;
        }

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

        .modal-content {
            background-color: white;
            border-radius: 10px;
            width: 90%;
            max-width: 600px;
            max-height: 90vh;
            overflow-y: auto;
            padding: 25px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .modal-title {
            font-size: 1.3rem;
            font-weight: 600;
        }

        .close {
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--gray);
        }

        .modal-footer {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            margin-top: 20px;
        }

        /* Tabs */
        .tabs {
            display: flex;
            border-bottom: 1px solid var(--light-gray);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .tab {
            padding: 12px 20px;
            cursor: pointer;
            font-weight: 500;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }

        .tab.active {
            color: var(--primary);
            border-bottom: 3px solid var(--primary);
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        /* Footer */
        footer {
            background-color: white;
            padding: 20px 0;
            border-top: 1px solid var(--light-gray);
            text-align: center;
            color: var(--gray);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 15px;
            }

            nav ul {
                gap: 15px;
                flex-wrap: wrap;
                justify-content: center;
            }

            .dashboard {
                grid-template-columns: 1fr;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }

            .tabs {
                flex-direction: column;
            }

            .tab {
                text-align: center;
            }

            table {
                display: block;
                overflow-x: auto;
            }

            .action-buttons {
                flex-direction: column;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 10px;
            }

            .card {
                padding: 15px;
            }

            th, td {
                padding: 10px 5px;
            }

            .modal-content {
                padding: 15px;
            }
        }