.back-to-top{position:fixed;z-index:9999;right:24px;bottom:24px;width:48px;height:48px;padding:0;border:0;border-radius:50%;background:#9e6f0d;color:#fff;font-size:19px;line-height:48px;text-align:center;cursor:pointer;opacity:0;visibility:hidden;box-shadow:0 8px 22px rgba(0,0,0,.22);transition:opacity .25s,visibility .25s,transform .25s,background .25s}
.back-to-top.is-visible{opacity:1;visibility:visible}
.back-to-top:hover,.back-to-top:focus{background:#c28a13;color:#fff;outline:0;transform:translateY(-3px)}
@media(max-width:767px){.back-to-top{right:16px;bottom:16px;width:44px;height:44px;line-height:44px}}