.fancybox-container {
    z-index: 99999!important;
}
.fancybox-navigation .fancybox-button {
    background-clip: content-box;
    height: 100px;
    opacity: 0;
    position: absolute;
    top: calc(40% - 50px);
    width: 70px;
}
.fancybox-navigation .fancybox-button {
    background-clip: content-box;
    height: 100px;
    opacity: 0;
    position: absolute;
    top: calc(40% - 50px);
    width: 70px;
}