/* Base buttons - both classes */
.checkout_btn,
.checkout_buy_now {
  position: relative;
  overflow: hidden;
  z-index: 0;
  display: inline-block;
}

/* Premium shimmer effect (continuous) */
.checkout_btn::after,
.checkout_buy_now::after {
  content: '';
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    120deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,0.25) 50%,
    rgba(255,255,255,0) 100%
  );
  transform: skewX(-25deg);
  pointer-events: none;
  z-index: 1;
  animation: premiumShine 2.5s ease-in-out infinite;
}

/* Premium shimmer animation */
@keyframes premiumShine {
  0% { left: -150%; }
  50% { left: 150%; }
  100% { left: 150%; }
}