.back-to-top{position:fixed;z-index:20;right:24px;bottom:24px;width:48px;height:48px;display:grid;place-items:center;padding:0;border:1px solid rgba(104,190,232,.72);border-radius:50%;background:#2198d6;color:#07131a;box-shadow:0 10px 28px rgba(0,0,0,.32);cursor:pointer;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .2s ease,transform .2s ease,background .2s ease}.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}.back-to-top:hover{background:#68bee8}.back-to-top:focus-visible{outline:3px solid #f5f5f2;outline-offset:3px}.back-to-top svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2.5}@media(max-width:700px){.back-to-top{right:16px;bottom:max(78px,calc(env(safe-area-inset-bottom) + 18px))}}@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}