.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1; /* Ensure it's on top of other content */
}

.popup-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 30px;
    width: 60%;
    box-shadow: 0px 0px 10px #000;
    position: relative;
    z-index: 2; /* Make it appear on top of the overlay */
}

.close {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 25px;
    cursor: pointer;
}