.nk-portfolio-list .nk-portfolio-item.nk-portfolio-item-info-style-1.hover .nk-portfolio-item-info {
    background-color: rgba(0, 0, 0, .5);
}
.nk-portfolio-list .nk-portfolio-item.nk-portfolio-item-info-style-1.hover:hover .nk-portfolio-item-info {
    opacity: 0;
}