/* VectoreAI — Theme-Aware Reusable Skeleton Loaders */

:root {
  --skeleton-base: rgba(255, 255, 255, 0.07);
  --skeleton-highlight: rgba(255, 255, 255, 0.15);
  --skeleton-radius: var(--radius-sm, 12px);
  --skeleton-animation-duration: 1.6s;
}

[data-theme="light"] {
  --skeleton-base: rgba(13, 18, 29, 0.08);
  --skeleton-highlight: rgba(13, 18, 29, 0.16);
}

/* Base Primitive Skeleton Elements */
.skeleton {
  position: relative;
  overflow: hidden;
  background-color: var(--skeleton-base);
  border-radius: var(--skeleton-radius);
  pointer-events: none;
  user-select: none;
}

/* Shimmer Overlay Sweep Animation */
.skeleton::after,
.skeleton-shimmer {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--skeleton-highlight) 50%,
    transparent 100%
  );
  animation: skeletonShimmer var(--skeleton-animation-duration) infinite;
}

@keyframes skeletonShimmer {
  100% {
    transform: translateX(100%);
  }
}

/* Primitive Sub-Types */
.skeleton-text {
  height: 1em;
  margin-bottom: 0.6em;
  border-radius: 4px;
  width: 100%;
}

.skeleton-text:last-child {
  width: 75%;
  margin-bottom: 0;
}

.skeleton-title {
  height: 1.6em;
  margin-bottom: 0.85em;
  border-radius: 6px;
  width: 88%;
}

.skeleton-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm, 12px);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-button {
  height: 42px;
  width: 130px;
  border-radius: var(--radius-md, 20px);
}

.skeleton-badge {
  height: 22px;
  width: 70px;
  border-radius: 99px;
  display: inline-block;
}

/* -------------------------------------------------------------
 * Composite Skeleton Layout Components
 * ------------------------------------------------------------- */

/* Article Card Skeleton */
.skeleton-article-card {
  display: flex;
  flex-direction: column;
  background: var(--surface, rgba(15, 19, 29, 0.72));
  border: 1px solid var(--line, rgba(255, 255, 255, 0.11));
  border-radius: var(--radius-md, 20px);
  padding: 1.25rem;
  gap: 1rem;
}

.skeleton-article-card .card-media-skeleton {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm, 12px);
}

.skeleton-article-card .card-meta-skeleton {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Featured Hero Section Skeleton */
.skeleton-featured-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  background: var(--surface-solid, #10141d);
  border: 1px solid var(--line-bright, rgba(255, 255, 255, 0.22));
  border-radius: var(--radius-lg, 32px);
  padding: 2.5rem;
  min-height: 420px;
}

@media (max-width: 900px) {
  .skeleton-featured-hero {
    grid-template-columns: 1fr;
    padding: 1.5rem;
  }
}

.skeleton-featured-hero .hero-image-skeleton {
  width: 100%;
  height: 100%;
  min-height: 280px;
  border-radius: var(--radius-md, 20px);
}

.skeleton-featured-hero .hero-content-skeleton {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
}

/* Sidebar Story Skeleton */
.skeleton-sidebar-story {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line, rgba(255, 255, 255, 0.11));
}

.skeleton-sidebar-story:last-child {
  border-bottom: none;
}

.skeleton-sidebar-story .story-thumb-skeleton {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-xs, 7px);
  flex-shrink: 0;
}

/* Search Result Item Skeleton */
.skeleton-search-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm, 12px);
  background: var(--surface-2, rgba(25, 31, 45, 0.66));
  margin-bottom: 0.75rem;
}

.skeleton-search-item .search-thumb-skeleton {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xs, 7px);
  flex-shrink: 0;
}

/* Article Detail Page Skeleton */
.skeleton-article-detail {
  max-width: var(--reading, 760px);
  margin: 0 auto;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skeleton-article-detail .detail-header-skeleton {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skeleton-article-detail .detail-hero-image-skeleton {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md, 20px);
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .skeleton::after,
  .skeleton-shimmer {
    animation: none !important;
  }
}