.popup {
    display: none; /* Hidden by default */
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Black background with transparency */
    z-index: 1000; /* Ensure it is above other elements */
    overflow: auto; /* Enable scrolling */
}

.popup-content {
    background: #fff;
    margin: 5% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 600px;
    position: relative;
    overflow-y: auto; /* Enable vertical scrolling */
    max-height: 80%; /* Limit the height */
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

    .close:hover,
    .close:focus {
        color: black;
        text-decoration: none;
    }