.back-to-top{position:fixed;right:max(20px,env(safe-area-inset-right));bottom:max(20px,env(safe-area-inset-bottom));z-index:1000;display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:12px 18px;border:1px solid #f3f5f1;border-radius:4px;background:#1a4654;color:#f3f5f1;font:14px/1.2 Arial,Helvetica,sans-serif;box-shadow:0 3px 16px #102e3826;cursor:pointer;transition:background .2s}.back-to-top[hidden]{display:none}.back-to-top:hover{background:#285a66}.back-to-top:focus-visible{outline:3px solid #b78338;outline-offset:3px}.back-to-top span[aria-hidden]{font-size:21px}@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}