/* ==========================================================================
   BLOG.CSS - Styles spécifiques à la page blog
   ========================================================================== */
/* Ce fichier contient UNIQUEMENT les styles spécifiques au blog
   Les styles globaux (variables, boutons, cartes) sont dans design-system.css
   ========================================================================== */

/* ==========================================================================
   1. HERO DE LA PAGE BLOG
   ========================================================================== */
.blog-hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  padding: var(--space-xxl) 0 var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.1"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.blog-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 300;
  color: var(--color-text-on-dark);
  margin: 0 0 var(--space-md) 0;
  line-height: 1.2;
  position: relative;
  z-index: 1;
}

.blog-hero__description {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-text-on-dark);
  max-width: 600px;
  margin: 0 auto;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   2. SECTION DES ARTICLES BLOG
   ========================================================================== */
.blog-articles {
  padding: var(--space-xxl) 0;
  background: var(--color-background);
}

/* Grille des articles */
.blog-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xxl);
}

/* ==========================================================================
   3. SYSTÈME DE FILTRES BLOG
   ========================================================================== */
/* Filtres principaux */
.blog-filters {
  margin-top: var(--space-lg);
  padding: var(--space-md) 0;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.blog-filters__container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Boutons de filtre */
.blog-filter {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.blog-filter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.blog-filter:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.blog-filter--active {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-accent);
}

.blog-filter--active:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-on-accent);
}

/* Compteur dans les filtres */
.blog-filter__count {
  background: var(--color-hover);
  color: var(--color-text-secondary);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  min-width: 24px;
  text-align: center;
  transition: all var(--transition-fast);
}

.blog-filter--active .blog-filter__count {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-text-on-accent);
}

/* ==========================================================================
   4. SOUS-FILTRES BLOG
   ========================================================================== */
.blog-subfilters {
  margin-top: 0;
  padding: var(--space-md) 0;
  border-top: var(--border-width) solid var(--color-border);
  background: rgba(245, 241, 238, 0.8);
  backdrop-filter: blur(10px);
  animation: blogFadeInDown 0.3s ease;
}

.blog-subfilters__container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Groupes de sous-filtres */
.blog-subfilter-group {
  display: none;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  padding: var(--space-sm) 0;
}

.blog-subfilter-group.active {
  display: flex;
  animation: blogFadeInUp 0.3s ease;
}

.blog-subfilter-group__label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-right: var(--space-sm);
  display: flex;
  align-items: center;
  white-space: nowrap;
}

/* Sous-filtres individuels */
.blog-subfilter {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-accent);
  font-size: 0.85rem;
  padding: var(--space-xxs) var(--space-sm);
  box-shadow: var(--shadow-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  border-radius: var(--radius-full);
  cursor: pointer;
}

.blog-subfilter:hover {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.blog-subfilter.blog-subfilter--active {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
}

/* ==========================================================================
   5. ÉTATS SPÉCIAUX DU BLOG
   ========================================================================== */
/* État "aucun article" */
.blog-articles-empty {
  text-align: center;
  padding: var(--space-xxl) var(--space-md);
  display: none;
}

.blog-articles-empty.active {
  display: block;
}

.blog-articles-empty__content {
  max-width: 400px;
  margin: 0 auto;
}

.blog-articles-empty__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin: var(--space-md) 0 var(--space-sm);
}

.blog-articles-empty__text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

/* État filtrage en cours */
.blog-articles-grid.filtering {
  opacity: 0.7;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

/* Indicateur de chargement filtrage */
.blog-filter-loading {
  position: relative;
}

.blog-filter-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: var(--border-width-thick) solid var(--color-border);
  border-top: var(--border-width-thick) solid var(--color-accent);
  border-radius: 50%;
  animation: blogSpin 1s linear infinite;
}

/* ==========================================================================
   6. PAGINATION BLOG
   ========================================================================== */
.blog-pagination {
  display: flex;
  justify-content: center;
  margin-top: var(--space-xl);
}

.blog-pagination__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-xs);
}

.blog-pagination__item {
  margin: 0;
}

.blog-pagination__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  border: var(--border-width) solid var(--color-border);
  background: var(--color-surface);
}

.blog-pagination__link:hover {
  background: var(--color-hover);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.blog-pagination__link--active {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-accent);
}

.blog-pagination__link--prev,
.blog-pagination__link--next {
  background: var(--color-secondary);
  color: var(--color-text-primary);
}

.blog-pagination__link--prev:hover,
.blog-pagination__link--next:hover {
  background: var(--color-success);
  color: var(--color-text-on-accent);
  border-color: var(--color-success);
}

.blog-pagination__ellipsis {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   7. ANIMATIONS SPÉCIFIQUES AU BLOG
   ========================================================================== */
@keyframes blogFadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blogFadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blogSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ==========================================================================
   8. RESPONSIVE DESIGN - Blog
   ========================================================================== */
/* Tablet (≤ 1200px) */
@media (max-width: 1200px) {
  .blog-articles-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
  }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
  .blog-hero {
    padding: var(--space-xl) 0 var(--space-lg);
  }
  
  .blog-hero__title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    margin-bottom: var(--space-sm);
  }
  
  .blog-hero__description {
    font-size: 1.1rem;
    padding: 0 var(--space-md);
  }
  
  .blog-articles {
    padding: var(--space-xl) 0;
  }
  
  .blog-articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .blog-filters__container {
    gap: var(--space-xs);
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: var(--space-xs);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  
  .blog-filters__container::-webkit-scrollbar {
    display: none;
  }
  
  .blog-filter {
    flex-shrink: 0;
    padding: var(--space-xxs) var(--space-sm);
    font-size: 0.85rem;
  }
  
  .blog-subfilters__container {
    gap: var(--space-xs);
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: var(--space-xs);
    scrollbar-width: none;
  }
  
  .blog-subfilters__container::-webkit-scrollbar {
    display: none;
  }
  
  .blog-subfilter-group {
    justify-content: flex-start;
  }
  
  .blog-subfilter-group__label {
    width: 100%;
    text-align: center;
    margin-right: 0;
    margin-bottom: var(--space-xs);
    justify-content: center;
  }
  
  .blog-subfilter {
    flex-shrink: 0;
    padding: var(--space-xxs) var(--space-sm);
    font-size: 0.8rem;
  }
  
  .blog-pagination__link {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
  }
  
  .blog-articles-empty {
    padding: var(--space-lg) var(--space-md);
  }
  
  .blog-articles-empty__title {
    font-size: 1.3rem;
  }
}

/* Mobile small (≤ 480px) */
@media (max-width: 480px) {
  .blog-hero__title {
    font-size: 1.75rem;
  }
  
  .blog-pagination__list {
    gap: var(--space-xxs);
  }
  
  .blog-pagination__link {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }
  
  .blog-filter__count {
    min-width: 20px;
    padding: 1px 4px;
  }
}

/* ==========================================================================
   9. ACCESSIBILITÉ ET PREFERENCES - Blog
   ========================================================================== */
/* Réduction des animations */
@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  .blog-subfilter,
  .blog-pagination__link {
    transition: none;
  }
  
  .blog-subfilters,
  .blog-subfilter-group.active {
    animation: none;
  }
  
  .blog-filter-loading::after {
    animation: none;
    display: none;
  }
}

/* Styles de focus pour accessibilité */
.blog-filter:focus-visible,
.blog-subfilter:focus-visible,
.blog-pagination__link:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Mode contraste élevé */
@media (prefers-contrast: high) {
  .blog-filter,
  .blog-subfilter,
  .blog-pagination__link {
    border-width: var(--border-width-thick);
  }
  
  .blog-filter--active,
  .blog-subfilter.blog-subfilter--active {
    border-width: var(--border-width-heavy);
  }
}

/* Impression */
@media print {
  .blog-filters,
  .blog-subfilters,
  .blog-pagination,
  .blog-hero::before {
    display: none;
  }
  
  .blog-hero {
    background: none !important;
    padding: var(--space-md) 0;
  }
  
  .blog-hero__title {
    color: var(--color-text-primary) !important;
  }
  
  .blog-hero__description {
    color: var(--color-text-secondary) !important;
  }
  
  .blog-articles-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* ==========================================================================
   FIN DU FICHIER BLOG.CSS
   ========================================================================== */
/* Note: Tous les styles globaux (variables, boutons, cartes) sont dans design-system.css */