.back-to-top{position:fixed;right:24px;bottom:24px;z-index:900;display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:none;border-radius:50%;background:var(--color-gold-500);color:#fff;box-shadow:0 8px 24px #d9770659;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease}.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{background:var(--color-gold-600)}.back-to-top svg{width:20px;height:20px}@media (max-width: 640px){.back-to-top{right:16px;bottom:16px;width:42px;height:42px}.back-to-top svg{width:18px;height:18px}}