.tidal-period-tabs .tidal-period-saving:has(svg) {
  background-size: 220% 100%;
  background-position: 0% 50%;
  animation: tidal-period-savings-flow 5s ease-in-out infinite alternate;
}
@keyframes tidal-period-savings-flow {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}
@media (prefers-reduced-motion: reduce) {
  .tidal-period-tabs .tidal-period-saving:has(svg) { animation: none; background-size: 100% 100%; }
}