#imageSlideshow {
    position: relative;
    width: 70vw;
    height: calc(70vw / (16/9));
    margin: auto auto;
    border-radius: 20px;
    overflow: hidden;
}
.slideshowimg {
    width: 100%;
    margin: auto auto;
    visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    border-radius: 20px;
    transition: visibility 0.8s, opacity 0.8s ease-out;
}
.slideshowactive {
    visibility: visible;
    opacity: 1;
    transition: visibility 0.8s, opacity 0.8s ease-out;
}