.footer-shimmer {
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.4), transparent);
  background-size: 200% 100%;
  animation: shimmer-footer 3s ease-in-out infinite;
}
@keyframes shimmer-footer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}