.underline{position:relative}.underline::before{content:'';position:absolute;bottom:0;right:0;width:0;height:1px;background-color:#6ac17b;transition:width .6s cubic-bezier(0.25,1,0.5,1)}@media(hover:hover) and (pointer:fine){.underline:hover::before{left:0;right:auto;width:100%}}