body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f9;
        }
        #notification-popup {
            display: none; /* Hidden by default */
            position: fixed;
            top: 50%; /* Aligns to the middle vertically */
            left: 20px; /* Aligned to the left */
            transform: translateY(-50%); /* Centers vertically */
            width: 300px;
            padding: 15px;
            background-color: #fff;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            border-left: 5px solid #4caf50;
            z-index: 1000;
        }
        #notification-popup h4 {
            margin: 0;
            font-size: 16px;
            color: #333;
        }
        #notification-popup p {
            margin: 5px 0 10px;
            font-size: 14px;
            color: #666;