.back-to-top{margin-bottom:env(safe-area-inset-bottom);margin-right:env(safe-area-inset-right);cursor:pointer;background:var(--brand);color:#fff;z-index:10;border-radius:14px;justify-content:center;align-items:center;width:46px;height:46px;font-size:18px;transition:background .15s,transform .15s;display:flex;position:fixed;bottom:30px;right:30px;box-shadow:0 8px 20px #0b1f3333}.back-to-top:hover{background:#1f5577;transform:translateY(-2px)}