.btn_icon:hover img{animation:.5s cubic-bezier(.455,.030,.515,.955) both rotate-vert-center}@keyframes rotate-vert-center{0%{transform:rotateY(0)}100%{transform:rotateY(360deg)}}.mb-5{margin-bottom:3rem}.box_grad{position:absolute;top:0;bottom:0;left:0;right:0;z-index:1;background:linear-gradient(180deg,rgba(0,0,0,.9) 5%,rgba(0,0,0,.1) 40%);box-shadow:0 0 30px 0 rgba(0,0,0,.75) inset}