.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 40px;
    background-color: #ffffff;
    border: 1px solid #ddd;
    border-radius: 15px;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    width: 400px;
    height: auto;
}

.popup-content {
    text-align: center;
}

.popup-content h3 {
    margin-bottom: 20px;
}

#popup-close {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background-color: #61a8de;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}