.store-shell .store-footer .footer-newsletter button,
.admin .preview-store .store-footer .footer-newsletter button {
  position: relative;
  display: grid;
  place-items: center;
  padding: 0;
}
.store-shell .store-footer .footer-newsletter button::before,
.admin .preview-store .store-footer .footer-newsletter button::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 20px;
  height: 20px;
  margin: 0;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m13.7 4.3-1.4 1.4 5.3 5.3H4v2h13.6l-5.3 5.3 1.4 1.4 7.7-7.7z'/%3E%3C/svg%3E") center / 20px 20px no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m13.7 4.3-1.4 1.4 5.3 5.3H4v2h13.6l-5.3 5.3 1.4 1.4 7.7-7.7z'/%3E%3C/svg%3E") center / 20px 20px no-repeat;
  transform: translate(-50%, -50%);
}
.store-shell .store-footer .footer-newsletter button:hover::before,
.admin .preview-store .store-footer .footer-newsletter button:hover::before {
  transform: translate(-50%, -50%);
}