body{font-family:Roboto,sans-serif;font-size:14px;margin:0;padding:0}.header{align-items:center;background-color:#fff;border-bottom:1px solid #ddd;display:flex;justify-content:space-between;padding:20px}.logo-link img{height:70px}.button{background-color:#ffe400;border:none;color:#000;font-size:16px;font-weight:700;line-height:20px;overflow:hidden;padding:25px 35px;position:relative;text-decoration:none;transition:color .3s ease}.button:before{background-color:gold;content:"";height:100%;left:0;position:absolute;top:100%;transition:top .3s ease;width:100%;z-index:0}.button:hover:before{top:0}.button span{position:relative;z-index:1}