<!-- Head tag -->
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>NIPH Data Sharing Platform</title>
    <link rel="icon" type="image/x-icon" href="/assets/images/niphlogo.ico">

    <!-- Bootstrap -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" />

    <!-- FontAwesome -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css" />

    <!-- Custom styles -->
    <style>
        body {
            font-family: 'Inter', sans-serif;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }

        .wrapper {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: 250px;
            background-color: #0b4076ff;
            color: white;
            min-height: 100vh;
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1030;
            border-radius: 0 12px 12px 0;
            padding: 0;
            overflow-y: auto;
            max-height: 100vh;
        }

        .sidebar .admin-header {
            background-color: #28a745;
            color: white;
            font-weight: bold;
            font-size: 1.25rem;
            padding: 16px 0;
            letter-spacing: 1px;
            border-bottom: 1px solid #157347;
            user-select: none;
        }

        .sidebar .nav-link {
            color: #adb5bd;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            border-radius: 8px;
            font-weight: 500;
            transition: background-color 0.2s, color 0.2s;
        }

        .sidebar .nav-link i {
            margin-right: 12px;
            width: 20px;
            text-align: center;
        }

        .sidebar .nav-link:hover {
            background-color: #495057;
            color: white;
        }

        .sidebar .nav-link.active {
            background-color: #1456b9ff;
            color: white;
            font-weight: 700;
        }

        .main-content {
            margin-left: 250px;
            padding: 1.5rem 2rem;
            flex-grow: 1;
            transition: margin-left 0.3s ease;
        }

        #overlay {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1029;
        }

        #mobile-topbar {
            height: 56px;
            background: #198754;
            color: white;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
        }

        #mobile-topbar h4 {
            font-size: 1.125rem;
        }

        #mobile-topbar button {
            border-radius: 50%;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            background: transparent;
            color: white;
            padding: 0.35rem 0.5rem;
            font-size: 1.2rem;
            transition: background-color 0.2s, color 0.2s;
        }

        #mobile-topbar button:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        @media (max-width: 991.98px) {
            .sidebar {
                left: -250px;
                padding-top: 56px;
            }

            .sidebar.show {
                left: 0;
                box-shadow: 2px 0 12px rgba(0, 0, 0, 0.25);
            }

            .main-content {
                margin-left: 0;
                margin-top: 56px;
            }

            #overlay.show {
                display: block;
            }
        }
    </style>
</head>