#image-slider-image-list{
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;

    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    content: "";
    z-index: -1;

    margin: 0;
    padding: 0;
    overflow: hidden;
}

.image-slider-image-list-item{
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
}

.visible{
    display: block;
}

.collapsed{
    display: none;
}