.product-quick-add {
  display: block;
  position: fixed;
  width: 100%;
  box-sizing: border-box;
  bottom: 0;
  right: 0;
  z-index: 2;
  padding: 16px;
  transition: transform 300ms ease-in-out;
}
@media (min-width: 768px) {
  .product-quick-add {
    display: none;
  }
}