.back-to-top{background:none;bottom:20%;cursor:pointer;max-width:75px;position:fixed;right:4%;z-index:800}@media (max-width:576px){.back-to-top{max-width:40px;z-index:800}}@keyframes bounce{0%,20%,60%,to{transform:translateY(0)}40%{transform:translateY(-35px)}80%{transform:translateY(-20px)}}.bounce{animation:bounce 1s ease}