.eu-btn{display:inline-block;padding:0.9rem 1.8rem;font-size:14px;color:white;cursor:pointer;position:relative;background-color:#37dcf1;text-decoration:none;overflow:hidden;z-index:1;font-family:Roboto;text-transform:uppercase;font-weight:500;letter-spacing:2px}.eu-btn::before{content:"";position:absolute;left:0;top:0;width:100%;height:100%;background-color:#303849;transform:translateX(-100%);transition:all .3s;z-index:-1}.eu-btn:hover::before{transform:translateX(0)}