.back-top{position:fixed;right:24px;bottom:24px;z-index:30;display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#c34670;color:#fff;text-decoration:none;font:400 30px/1 Arial,sans-serif;box-shadow:0 6px 16px #c3467040;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s,visibility .2s,transform .2s,background .2s}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:#dd5186;color:#fff;transform:translateY(-3px)}
@media(max-width:760px){.back-top{right:18px;bottom:18px;width:46px;height:46px;font-size:26px}}