.rtm-shine-position { position: relative; }
.rtm-button-shine-overlay {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
  border-radius: inherit;
  pointer-events: none;
  z-index: 2;
}
.rtm-button-shine-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: -300px;
  width: 300px;
  height: 100%;
  background-image: linear-gradient(120deg, rgba(255,255,255,0) 30%, rgba(255,255,255,.5), rgba(255,255,255,0) 70%);
  animation: shine 3s ease-in-out infinite;
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .rtm-button-shine-overlay { display: none; }
  .rtm-button-shine-overlay::before { animation: none; }
}