#popupOverlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 999;
}

#couponPopup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #F6F6F6;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    width: 90%;
    max-width: 400px;
    max-height: 90%;
    overflow-y: auto;
}

#couponPopup h2 {
    text-align: center;
}

#couponPopup h2 span {
    color: blue;
}

#couponPopup p {
    text-align: center;
}

#popupForm input,
#popupForm select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
}

#popupForm button {
    width: 100%;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
}

#successMessage {
    display: none;
    margin-top: 20px;
    text-align: center;
    color: green;
}