@nguyenmv2/buy-button/src/styles/embeds/sass/utilities.css

BuyButton.js allows merchants to build Shopify interfaces into any website

.shopify-buy__type--center {
  text-align: center;
}

.shopify-buy--visually-hidden {
  position: absolute !important;
  clip: rect(1px, 1px, 1px, 1px);
  padding:0 !important;
  border:0 !important;
  height: 1px !important;
  width: 1px !important;
  overflow: hidden;
}