.button-shine:before{content:"";position:absolute;width:4vw;height:100%;background-image:linear-gradient(120deg,hsla(0,0%,100%,0) 30%,hsla(0,0%,100%,.8),hsla(0,0%,100%,0) 70%);top:0;left:-100px;opacity:.6}.button-shine:hover:before{animation:shine 1.5s ease-out infinite}@keyframes shine{0%{left:-100px}60%{left:100%}to{left:100%}}