.back-to-top{right:max(18px,env(safe-area-inset-right));z-index:30;color:#fff;cursor:pointer;background:#185b52;border:1px solid #fff9;border-radius:50%;place-items:center;width:48px;height:48px;font:28px Arial,sans-serif;display:grid;position:fixed;bottom:90px;box-shadow:0 4px 18px #0003}.back-to-top:focus-visible{outline-offset:3px;outline:3px solid #f8bd58}