.animate-button1 {
  background: linear-gradient(
    50.25deg,
    rgba(240, 185, 11, 1),
    /* Gold */ rgba(18, 18, 18, 0.3) /* Dark with transparency */
  );
  background-size: 200% 100%;
  background-position: 100% 50%; /* Start from right */
  animation: moveBackground 8s ease-in-out infinite;
}

@keyframes moveBackground {
  0% {
    background-position: 100% 50%; /* Right */
    background-image: linear-gradient(
      50.25deg,
      rgba(240, 185, 11, 1),
      rgba(18, 18, 18, 0.3)
    );
  }
  50% {
    background-position: 0% 50%; /* Left */
    background-image: linear-gradient(
      50.25deg,
      rgba(18, 18, 18, 1),
      rgba(240, 185, 11, 0.7)
    );
  }
  100% {
    background-position: 100% 50%; /* Right */
    background-image: linear-gradient(
      50.25deg,
      rgba(240, 185, 11, 1),
      rgba(18, 18, 18, 0.3)
    );
  }
}