/* Checkout interaction feedback: scoped to book purchase buttons only. */
[data-book-buy]:not(.pi-checkout-loading):hover,
[data-book-buy]:not(.pi-checkout-loading):focus-visible {
  border-color: var(--teal);
  color: var(--teal-600);
}

[data-book-buy].pi-checkout-loading {
  position: relative;
  border-color: var(--teal);
  background: var(--cream-deep);
  color: var(--teal-600);
  box-shadow: inset 0 0 0 1px var(--teal);
  cursor: progress;
  transform: none;
}

[data-book-buy].pi-checkout-loading::after {
  content: "";
  width: 0.9em;
  height: 0.9em;
  flex: 0 0 0.9em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: pi-checkout-spin 0.75s linear infinite;
}

@keyframes pi-checkout-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  [data-book-buy].pi-checkout-loading::after { animation: none; }
}