/* Modal Styling */
        .modal {
            display: none; 
            position: fixed; 
            z-index: 1; 
            left: 0; 
            top: 0; 
            width: 100%; 
            height: 100%; 
            background-color: rgba(0, 0, 0, 0.5);
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background-color: white;
            margin: 0 auto;
            padding: 20px;
            border: 1px solid #888;
            width: 100%;
            max-width: 400px;
            text-align: center;
            position: relative;
        }

        .close-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            background-color: #ff5c5c;
            color: white;
            border: none;
            padding: 5px 10px;
            cursor: pointer;
            font-size: 14px;
        }

        input[type=email], button {
            width: 80%;
            padding: 10px;
            margin: 10px 0;
        }

        .coupon-code {
            font-size: 24px;
            color: green;
        }

        #errorMessage {
            color: red;
            display: none;
        }

        /* Responsive Adjustments */
        @media (max-width: 600px) {
            .modal-content {
                width: 90%;
            }
        }