/**
 * Reusable Components
 * AI Regulation Publication
 */

/* ===================
   ARTICLE CARDS
   =================== */

.article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.article-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-default);
  box-shadow: var(--shadow-lg);
}

.article-card-link {
  display: block;
  padding: var(--space-6);
  text-decoration: none;
}

.article-card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.article-card-category {
  font-size: var(--text-caption);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--accent-primary);
}

.article-card-date {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
}

.article-card-title {
  font-size: var(--text-heading-md);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: var(--leading-snug);
}

.article-card-excerpt {
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-normal);
}

.article-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-caption);
  color: var(--text-tertiary);
}

/* Featured Article Card (Larger) */
.article-card-featured {
  grid-column: span 2;
}

.article-card-featured .article-card-link {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.article-card-featured .article-card-image {
  height: 100%;
  min-height: 250px;
  margin-bottom: 0;
}

.article-card-featured .article-card-title {
  font-size: var(--text-heading-lg);
}

@media (max-width: 768px) {
  .article-card-featured {
    grid-column: span 1;
  }

  .article-card-featured .article-card-link {
    display: block;
  }

  .article-card-featured .article-card-image {
    height: 180px;
    margin-bottom: var(--space-4);
  }
}

/* ===================
   ARTICLE GRID
   =================== */

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}

/* ===================
   HERO SECTION
   =================== */

.hero {
  text-align: center;
  padding: var(--space-20) 0;
  max-width: var(--width-wide);
  margin: 0 auto;
}

.hero-title {
  font-size: var(--text-display-xl);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--text-body-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-normal);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-12) 0;
  }

  .hero-title {
    font-size: var(--text-display-md);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}

/* ===================
   SECTION HEADERS
   =================== */

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: var(--text-heading-lg);
  margin: 0;
}

.section-link {
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
}

.section-link:hover {
  color: var(--accent-primary);
}

/* ===================
   TAGS
   =================== */

.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-caption);
  font-weight: 500;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--accent-muted);
  color: var(--accent-primary);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ===================
   PAGINATION
   =================== */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}

.pagination-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.pagination-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--bg-primary);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===================
   SOCIAL SHARE
   =================== */

.share-buttons {
  display: flex;
  gap: var(--space-3);
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.share-btn:hover {
  background: var(--accent-muted);
  color: var(--accent-primary);
}

.share-btn svg {
  width: 18px;
  height: 18px;
}

/* ===================
   LOADING STATES
   =================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ===================
   EMPTY STATES
   =================== */

.empty-state {
  text-align: center;
  padding: var(--space-16) 0;
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--text-heading-md);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

/* ===================
   UTILITIES
   =================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.text-center {
  text-align: center;
}

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }