.button-underline:after{background:#fff;bottom:0;content:"";height:1px;left:0;position:absolute;transform:scaleX(0);transform-origin:left;transition:transform .3s ease-in-out;width:100%}.button-underline{overflow:hidden;position:relative}.button-underline:after{background:#a5d7d5;bottom:0;content:"";height:1px;left:0;position:absolute;transform:scaleX(0);transform-origin:left;transition:transform .3s ease-in-out;width:100%}.button-underline:hover:after{transform:scaleX(1)}