.bold-back-to-top{display:none}
@media(min-width:0px){
  .bold-back-to-top:not([hidden]){display:block;position:fixed;left:16px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:30;min-height:44px;padding:10px 16px;border:1px solid #ccc;border-radius:4px;background:#fff;color:#111;font:inherit;font-size:14px;line-height:1.4;box-shadow:0 2px 8px #0002;cursor:pointer}
  .bold-back-to-top:focus-visible{outline:2px solid #111;outline-offset:3px}
  body:has(dialog[open],modal-dialog[open],cart-drawer.active,details.menu-opening) .bold-back-to-top{display:none}
}