.slideshow {
    position: absolute;
    width: 100vw;
    height: 100vh;
    top:0;
    left:0;
    z-index:0;
}

.slideshow picture {
    left: 0%;
    top: 0%;
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 90;
    padding: 0;
    margin: 0 !important;
    display:flex;
    flex-flow: row nowrap;
    justify-content:center;
    align-items:center;
    visibility:hidden;
}

.slideshow img {
    min-width: 100%;
    min-height: 100%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateY(-50%) translateX(-50%);
}