/* ===================================================================
   VPRR BLOG - Styles spécifiques (Apple-inspired Design)
   =================================================================== */

/* ===================================================================
   1. VARIABLES BLOG
   =================================================================== */

:root {
  --blog-radius-sm: 16px;
  --blog-radius: 24px;
  --blog-radius-lg: 32px;
  --blog-shadow-card: 0 4px 24px rgba(45, 36, 30, 0.08);
  --blog-shadow-card-hover: 0 12px 40px rgba(45, 36, 30, 0.12);
  --blog-transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ===================================================================
   2. HERO BLOG
   =================================================================== */

.blog-hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.blog-hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.blog-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-accent);
  margin-bottom: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--brand-accent-light);
  border-radius: var(--radius-pill);
}

.blog-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
  line-height: 1.1;
}

.text-accent {
  color: var(--brand-accent);
}

.blog-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

/* ===================================================================
   3. FILTRES PAR CATÉGORIE
   =================================================================== */

.blog-filters {
  padding: var(--space-xl) 0;
  background: var(--color-bg);
  position: sticky;
  top: var(--header-height);
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

.filters-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--blog-transition);
  white-space: nowrap;
  min-height: 44px; /* Minimum WCAG touch target height */
}

.filter-btn:hover {
  color: var(--color-text);
  border-color: var(--brand-accent);
  box-shadow: var(--blog-shadow-card);
}

.filter-btn.active {
  color: var(--color-white);
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: var(--blog-shadow-card);
}

.filter-btn i {
  font-size: 0.875rem;
}

/* ===================================================================
   4. GRILLE D'ARTICLES
   =================================================================== */

.blog-grid-section {
  padding: var(--space-3xl) 0;
  min-height: 400px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-xl);
}

/* Carte d'article - Style Apple */
.article-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border-radius: var(--blog-radius);
  overflow: hidden;
  box-shadow: var(--blog-shadow-card);
  transition: var(--blog-transition);
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--blog-shadow-card-hover);
}

.article-card:hover .article-image img {
  transform: scale(1.05);
}

.article-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-surface-alt);
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.article-tag {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.6875rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.article-meta i {
  font-size: 0.75rem;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
  margin-bottom: var(--space-md);
}

.article-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  margin-top: auto;
}

.article-cta i {
  font-size: 0.875rem;
  transition: transform 0.2s ease;
}

.article-card:hover .article-cta i {
  transform: translateX(4px);
}

/* ===================================================================
   5. ÉTATS DE CHARGEMENT ET VIDE
   =================================================================== */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl) 0;
  grid-column: 1 / -1;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--brand-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-md);
}

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

.loading-state p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl) 0;
  text-align: center;
  grid-column: 1 / -1;
}

.empty-state i {
  font-size: 3rem;
  color: var(--brand-accent);
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-state h2 {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.empty-state p {
  color: var(--color-text-light);
}

/* ===================================================================
   6. PAGINATION
   =================================================================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.page-info {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

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

/* ===================================================================
   7. CTA SECTION
   =================================================================== */

.blog-cta {
  padding: var(--space-3xl) 0 var(--space-4xl);
  background: var(--color-bg);
}

.cta-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  padding: var(--space-3xl);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
  border-radius: var(--blog-radius-lg);
  box-shadow: var(--blog-shadow-card);
}

.cta-content {
  flex: 1;
  min-width: 300px;
}

.cta-content h2 {
  text-align: left;
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
}

.cta-content p {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: var(--blog-transition);
}

.btn-outline:hover {
  background: var(--color-surface-alt);
  border-color: var(--brand-accent);
  color: var(--color-text);
}

/* ===================================================================
   8. FOOTER BLOG (Supprimé car géré par assets/js/footer.js)
   =================================================================== */

.blog-footer {
  display: none;
}

/* ===================================================================
   9. RESPONSIVE
   =================================================================== */

@media (max-width: 768px) {
  .blog-hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }
  
  .blog-title {
    font-size: 2rem;
  }
  
  .blog-subtitle {
    font-size: 1.0625rem;
  }
  
  .blog-filters {
    padding: var(--space-md) 0;
    position: relative;
    top: 0; /* Remove sticky on mobile to avoid layout shifts */
  }
  
  .filters-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs);
    padding: 0 var(--space-md);
  }
  
  .filter-btn {
    width: 100%;
    padding: 0.75rem 0.5rem;
    font-size: 0.8125rem;
    min-height: 48px; /* Slightly larger for mobile fingers */
    border-radius: 12px; /* Less rounded for better grid appearance */
  }
  
  .filter-btn.active {
    box-shadow: 0 4px 12px rgba(103, 58, 18, 0.2);
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .cta-card {
    padding: var(--space-xl);
  }
  
  .cta-content h2 {
    font-size: 1.375rem;
  }
  
  .cta-actions {
    width: 100%;
  }
  
  .cta-actions .btn {
    flex: 1;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .article-content {
    padding: var(--space-md);
  }
  
  .article-title {
    font-size: 1.125rem;
  }
  
  .pagination {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .pagination .btn {
    width: 100%;
  }
}