.link-underline{background-image:linear-gradient(transparent,transparent),linear-gradient(#fff,#fff);background-position:0 100%;background-repeat:no-repeat;background-size:0 3px;border-bottom-width:0;transition:background-size .4s cubic-bezier(.3,1,.8,1)}.link-underline-black{background-image:linear-gradient(transparent,transparent),linear-gradient(#5c324b,#5c324b)}.link-underline:hover{background-position:0 100%;background-size:100% 3px}