.back-top{position:fixed;right:22px;bottom:22px;z-index:1100;width:52px;height:52px;border-radius:50%;border:1px solid rgba(8,26,51,.10);background:#fff;color:#081a33;box-shadow:0 12px 30px rgba(8,26,51,.16);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s ease,visibility .25s ease,transform .25s ease}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:#01c2da;color:#052c39}
.back-top:focus-visible{outline:3px solid #175bff;outline-offset:3px}
@media(max-width:620px){.back-top{right:16px;bottom:max(78px,calc(env(safe-area-inset-bottom) + 68px));width:46px;height:46px}}
@media(prefers-reduced-motion:reduce){.back-top{transition:none}}