/* ═══════════════════════════════════════════════════════════════════════════
   ANIMATIONS — Skeleton loaders, card interactions, micro-interactions
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Skeleton Loader ── */
.kx-skeleton {
  background: linear-gradient(
    90deg,
    var(--kx-input-bg) 25%,
    var(--kx-border) 50%,
    var(--kx-input-bg) 75%
  );
  background-size: 200% 100%;
  animation: kx-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--kx-radius-card-thumb);
}

@keyframes kx-shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Skeleton card structure */
.kx-skeleton-card {
  border-radius: var(--kx-radius-card);
  overflow: hidden;
  background-color: var(--kx-surface);
  box-shadow: var(--kx-shadow-1);
}

.kx-skeleton-card__cover {
  aspect-ratio: 3 / 4;
  background: linear-gradient(
    90deg,
    var(--kx-input-bg) 25%,
    var(--kx-border) 50%,
    var(--kx-input-bg) 75%
  );
  background-size: 200% 100%;
  animation: kx-shimmer 1.5s ease-in-out infinite;
}

.kx-skeleton-card__info {
  padding: var(--kx-component-padding);
}

.kx-skeleton-card__title {
  height: 14px;
  width: 80%;
  margin-bottom: 8px;
}

.kx-skeleton-card__author {
  height: 12px;
  width: 60%;
  margin-bottom: 8px;
}

.kx-skeleton-card__price {
  height: 14px;
  width: 40%;
}

/* ── Card Press Effect (iOS App Store pattern) ── */
.kx-book-card {
  transition: transform 200ms ease, box-shadow 200ms ease;
  will-change: transform;
}

.kx-book-card:active {
  transform: scale(0.97);
}

/* Desktop hover: lift effect */
@media (hover: hover) and (pointer: fine) {
  .kx-book-card:hover {
    transform: scale(1.02);
    box-shadow: var(--kx-shadow-2);
  }

  .kx-book-card:active {
    transform: scale(0.97);
    box-shadow: var(--kx-shadow-1);
  }
}

/* ── Bookmark Bounce ── */
@keyframes kx-bounce {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.25);
  }
  100% {
    transform: scale(1);
  }
}

.kx-bookmark--bounce {
  animation: kx-bounce 300ms ease;
}

/* ── Fade In on Scroll ── */
.kx-fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms ease, transform 400ms ease;
}

.kx-fade-in.kx-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Image Load Transition ── */
.kx-book-card__cover img {
  opacity: 0;
  transition: opacity 300ms ease;
}

.kx-book-card__cover img.kx-loaded {
  opacity: 1;
}

/* Show image immediately if JS doesn't run */
.no-js .kx-book-card__cover img {
  opacity: 1;
}

/* ── Add to Cart Confirmation ── */
.kx-btn-primary.kx-added {
  background-color: var(--kx-accent);
  pointer-events: none;
}

.kx-btn-primary.kx-added::after {
  content: " ✓";
}

/* ── Bottom Sheet Backdrop Transition ── */
.kx-bottom-sheet-overlay {
  transition: opacity 250ms ease;
}

/* ── Search suggestion fade ── */
.kx-search-suggestions {
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 200ms ease, transform 200ms ease;
  pointer-events: none;
}

.kx-search-suggestions--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ── Product gallery dot transition ── */
.kx-product-gallery__dot {
  transition: background-color 200ms ease, transform 200ms ease;
}

.kx-product-gallery__dot--active {
  transform: scale(1.2);
}

/* ── Description expand ── */
.kx-product__description-text {
  transition: max-height 300ms ease;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  .kx-skeleton,
  .kx-skeleton-card__cover {
    animation: none;
    background: var(--kx-input-bg);
  }

  .kx-book-card,
  .kx-bookmark,
  .kx-fade-in,
  .kx-book-card__cover img,
  .kx-bottom-sheet,
  .kx-bottom-sheet-overlay,
  .kx-search-suggestions,
  .kx-product-gallery__dot {
    transition: none !important;
    animation: none !important;
  }

  .kx-book-card:active,
  .kx-book-card:hover {
    transform: none !important;
  }

  .kx-fade-in {
    opacity: 1;
    transform: none;
  }

  .kx-book-card__cover img {
    opacity: 1;
  }
}