.single_add_to_cart_button.loading {
  position: relative !important;
  color: transparent !important;
}

.single_add_to_cart_button.loading::after {
  content: "";
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-top: 2px solid transparent;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: ignito-spin 0.6s linear infinite;
}

@keyframes ignito-spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.single_add_to_cart_button.added {
  opacity: 0.85;
}