.back-to-top{position:fixed;z-index:100;right:clamp(1rem,2.5vw,2rem);bottom:clamp(1rem,2.5vw,2rem);display:grid;width:3rem;height:3rem;place-items:center;border:1px solid rgba(240,232,218,.36);border-radius:50%;background:#a9133d;color:#fff;font-size:1.45rem;line-height:1;box-shadow:0 .5rem 1.8rem rgba(0,0,0,.38);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(.75rem);transition:opacity .18s ease,transform .18s ease,visibility .18s}.back-to-top[data-visible]{opacity:1;visibility:visible;transform:none}.back-to-top:hover{background:#c43a62}.back-to-top:focus-visible{outline:3px solid #f0e8da;outline-offset:3px}@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}