/* General styling for links */
        .sign-in {
            float: right;
            color: white;
            margin-top: 8px;
            font-size: 14px;
            font-weight: 800;
            cursor: pointer;
        }

        /* Popup background */
        .popup-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        /* Popup window styling */
        .popup-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50%;
            padding: 20px;
            background-color: white;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            border-radius: 8px;
            text-align: center;
        }

        /* Close button styling */
        .close-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            font-size: 25px;
            font-weight: bold;
            color: #333;
            cursor: pointer;
        }

        /* Image styling */
        .popup-image {
            width: 100%;
            border-radius: 5px;
        }