/**
 * MSiR Related Articles - November 2025
 * Related content grid with colored borders
 */

/* ========================================
   RELATED ARTICLES SECTION
   ======================================== */
.related-articles-section {
  max-width: 1200px;
  margin: var(--space-4xl) auto;
  padding: var(--space-2xl) var(--space-xl);
  background: #f8f9fa;
  border-radius: var(--radius-lg);
}

.related-articles-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.related-articles-header h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--laboratory-dark);
  margin-bottom: var(--space-md);
}

.related-articles-subtitle {
  font-size: 1.125rem;
  color: #6c757d;
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   RELATED ARTICLES GRID
   ======================================== */
.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

/* Ensure exactly 3 columns on desktop */
@media (min-width: 1025px) {
  .related-articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   RELATED ARTICLE CARD
   ======================================== */
.related-article-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.related-article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* 4-color border cycle (Cyan → Magenta → Orange) */
.related-article-card:nth-child(3n+1) { border-top: 4px solid var(--scientific-cyan); }
.related-article-card:nth-child(3n+2) { border-top: 4px solid var(--mad-magenta); }
.related-article-card:nth-child(3n+3) { border-top: 4px solid var(--experiment-orange); }

.related-article-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.related-article-content {
  padding: var(--space-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.related-article-category {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(0, 169, 224, 0.1);
  color: var(--scientific-cyan);
  border: 1px solid rgba(0, 169, 224, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
  width: fit-content;
}

.related-article-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.related-article-title a {
  color: var(--laboratory-dark);
  text-decoration: none;
  transition: color var(--transition-base);
}

.related-article-title a:hover {
  color: var(--scientific-cyan);
}

.related-article-excerpt {
  color: #6c757d;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex: 1;
}

.related-article-metadata {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  color: #6c757d;
}

.metadata-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.related-article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: auto;
}

.related-tag {
  padding: 0.25rem 0.5rem;
  background: #f8f9fa;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: #6c757d;
  font-weight: 600;
}

/* ========================================
   "VIEW ALL" CTA
   ======================================== */
.related-articles-footer {
  text-align: center;
  padding-top: var(--space-xl);
  border-top: 1px solid #e9ecef;
}

.view-all-articles-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-2xl);
  background: var(--scientific-cyan);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  transition: all var(--transition-base);
}

.view-all-articles-btn:hover {
  background: var(--mad-magenta);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ========================================
   PLACEHOLDER GRADIENT IMAGES
   ======================================== */
/* When no featured image, use gradient backgrounds */
.related-article-image.placeholder-1 {
  background: linear-gradient(135deg, var(--scientific-cyan) 0%, var(--flash-green) 100%);
}

.related-article-image.placeholder-2 {
  background: linear-gradient(135deg, var(--mad-magenta) 0%, var(--scientific-cyan) 100%);
}

.related-article-image.placeholder-3 {
  background: linear-gradient(135deg, var(--experiment-orange) 0%, var(--mad-magenta) 100%);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
  .related-articles-section {
    padding: var(--space-xl) var(--space-lg);
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .related-article-content {
    padding: var(--space-lg);
  }

  .related-article-title {
    font-size: 1.25rem;
  }

  .related-article-metadata {
    flex-direction: column;
    gap: var(--space-sm);
  }
}