/**
 * Articles CSS - Estilos para Biblioteca de Artículos
 */

/* ==================== VARIABLES ====================*/
:root {
  --articles-bg: #f5f5f5;
  --articles-card-bg: #ffffff;
  --articles-border: #e0e0e0;
  --articles-text: #333333;
  --articles-text-secondary: #666666;
  --articles-accent: #8CC63F;
  --articles-brand: #184A3A;
}

/* ==================== PÁGINA GENERAL ====================*/
.articles-page-container {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 120px);
  background-color: var(--articles-bg);
}

.articles-header {
  background: linear-gradient(135deg, var(--articles-brand) 0%, #0d2b22 100%);
  color: white;
  padding: 60px 20px;
  text-align: center;
  margin-bottom: 40px;
}

.articles-header-content h1 {
  font-size: 2.5rem;
  margin: 0 0 12px 0;
  font-weight: 700;
}

.articles-header-content p {
  font-size: 1.1rem;
  margin: 0;
  opacity: 0.9;
}

/* ==================== LAYOUT PRINCIPAL ====================*/
.articles-main-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  padding: 0 20px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ==================== SIDEBAR ====================*/
.articles-sidebar {
  display: flex;
  flex-direction: column;
  gap: 30px;
  position: sticky;
  top: 100px;
  height: fit-content;
}

/* Búsqueda */
.articles-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.articles-search-input {
  width: 100%;
  padding: 12px 40px 12px 16px;
  border: 2px solid var(--articles-border);
  border-radius: 8px;
  font-size: 0.95rem;
  background-color: var(--articles-card-bg);
  color: var(--articles-text);
  transition: all 0.3s ease;
}

.articles-search-input:focus {
  outline: none;
  border-color: var(--articles-accent);
  box-shadow: 0 0 0 3px rgba(140, 198, 63, 0.1);
}

.articles-search-input::placeholder {
  color: var(--articles-text-secondary);
}

.articles-clear-search {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--articles-text-secondary);
  opacity: 0;
  transition: all 0.2s ease;
  pointer-events: none;
  padding: 4px;
}

.articles-clear-search.visible {
  opacity: 1;
  pointer-events: auto;
}

.articles-clear-search:hover {
  color: var(--articles-text);
}

/* Filtros */
.articles-filters {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.filter-group {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--articles-border);
}

.filter-group:last-of-type {
  border-bottom: none;
}

.filter-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 12px 0;
  color: var(--articles-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
}

.filter-checkbox input {
  cursor: pointer;
  width: 16px;
  height: 16px;
  accent-color: var(--articles-accent);
}

.filter-checkbox span {
  color: var(--articles-text);
  transition: color 0.2s ease;
}

.filter-checkbox:hover span {
  color: var(--articles-accent);
}

/* Estadísticas */
.articles-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
  background-color: var(--articles-card-bg);
  border-radius: 8px;
  border: 1px solid var(--articles-border);
}

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

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--articles-brand);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--articles-text-secondary);
  text-transform: uppercase;
  margin-top: 4px;
}

/* Botones de filtros */
.clear-filters-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--articles-card-bg);
  border: 2px solid var(--articles-border);
  border-radius: 8px;
  color: var(--articles-text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.clear-filters-btn:hover {
  background-color: var(--articles-bg);
  border-color: var(--articles-brand);
  color: var(--articles-brand);
}

/* ==================== CONTENIDO PRINCIPAL ====================*/
.articles-main {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* Barra de vista */
.articles-view-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 16px;
  background-color: var(--articles-card-bg);
  border: 1px solid var(--articles-border);
  border-radius: 8px;
  flex-wrap: wrap;
}

.articles-view-controls {
  display: flex;
  gap: 8px;
}

.view-btn {
  padding: 8px 16px;
  background-color: var(--articles-card-bg);
  border: 1px solid var(--articles-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--articles-text-secondary);
  transition: all 0.2s ease;
}

.view-btn:hover {
  border-color: var(--articles-accent);
  color: var(--articles-accent);
}

.view-btn.active {
  background-color: var(--articles-accent);
  border-color: var(--articles-accent);
  color: white;
}

.articles-sort-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.articles-sort-controls label {
  font-size: 0.9rem;
  color: var(--articles-text);
  font-weight: 500;
}

.sort-select {
  padding: 8px 12px;
  border: 1px solid var(--articles-border);
  border-radius: 6px;
  background-color: var(--articles-card-bg);
  color: var(--articles-text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sort-select:hover {
  border-color: var(--articles-accent);
}

.sort-select:focus {
  outline: none;
  border-color: var(--articles-accent);
  box-shadow: 0 0 0 3px rgba(140, 198, 63, 0.1);
}

/* ==================== ARTÍCULOS DESTACADOS ====================*/
.articles-featured {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.articles-featured h2 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--articles-text);
}

.featured-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.featured-article-card {
  display: flex;
  flex-direction: column;
  background-color: var(--articles-card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.featured-article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
  border-color: var(--articles-accent);
}

.featured-article-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background-color: var(--articles-bg);
}

.featured-article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.featured-article-category {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: var(--articles-accent);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.featured-article-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.featured-article-content h3 {
  font-size: 1.2rem;
  margin: 0;
  color: var(--articles-text);
  line-height: 1.4;
}

.featured-article-content p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--articles-text-secondary);
  line-height: 1.5;
  flex: 1;
}

.featured-article-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.reading-time {
  font-size: 0.85rem;
  color: var(--articles-text-secondary);
}

.difficulty {
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.difficulty.beginner {
  background-color: #e8f5e9;
  color: #2e7d32;
}

.difficulty.intermediate {
  background-color: #fff3e0;
  color: #e65100;
}

.difficulty.advanced {
  background-color: #ffebee;
  color: #c62828;
}

.featured-article-btn {
  align-self: flex-start;
  padding: 10px 16px;
  background-color: var(--articles-accent);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 8px;
}

.featured-article-btn:hover {
  background-color: #7bb52d;
  transform: translateX(2px);
}

/* ==================== SECCIÓN DE ARTÍCULOS ====================*/
.articles-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 40px;
}

.articles-section h2 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--articles-text);
}

/* Grid de artículos */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.articles-grid.list-view {
  grid-template-columns: 1fr;
}

.articles-grid.list-view .article-card {
  display: flex;
  flex-direction: row;
  height: auto;
}

.articles-grid.list-view .article-card-image {
  width: 200px;
  height: 140px;
  min-width: 200px;
}

.articles-grid.list-view .article-card-content {
  flex: 1;
}

/* Tarjeta de artículo */
.article-card {
  display: flex;
  flex-direction: column;
  background-color: var(--articles-card-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  border: 1px solid var(--articles-border);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--articles-accent);
}

.article-card-image {
  position: relative;
  width: 100%;
  height: 160px;
  overflow: hidden;
  background-color: var(--articles-bg);
}

.article-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.article-card:hover .article-card-image img {
  transform: scale(1.08);
}

.article-card-category {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background-color: rgba(140, 198, 63, 0.95);
  color: white;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.article-card-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.article-card-header {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  justify-content: space-between;
}

.article-card-title {
  font-size: 1rem;
  margin: 0;
  color: var(--articles-text);
  line-height: 1.3;
  flex: 1;
  font-weight: 600;
}

.article-favorite-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: #ddd;
  transition: all 0.2s ease;
  padding: 0;
  min-width: 24px;
  line-height: 1;
}

.article-favorite-btn:hover {
  color: #ff6b6b;
  transform: scale(1.2);
}

.article-favorite-btn.active {
  color: #ff6b6b;
}

.article-card-excerpt {
  font-size: 0.85rem;
  color: var(--articles-text-secondary);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--articles-text-secondary);
  flex-wrap: wrap;
  align-items: center;
  margin-top: 4px;
}

.author {
  display: none;
}

.articles-grid.list-view .author {
  display: inline;
}

.article-read-btn {
  align-self: flex-start;
  padding: 8px 14px;
  background-color: transparent;
  color: var(--articles-accent);
  border: 1px solid var(--articles-accent);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 8px;
}

.article-read-btn:hover {
  background-color: var(--articles-accent);
  color: white;
}

/* ==================== ESTADO VACÍO ====================*/
.articles-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px 20px;
  text-align: center;
}

.articles-empty-state .empty-icon {
  font-size: 4rem;
  opacity: 0.5;
}

.articles-empty-state h3 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--articles-text);
}

.articles-empty-state p {
  margin: 0;
  color: var(--articles-text-secondary);
  font-size: 1rem;
}

/* ==================== VISTA DETALLADA DE ARTÍCULO ====================*/
.article-detail-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  background-color: var(--articles-card-bg);
  border-radius: 12px;
}

.article-back-btn {
  padding: 8px 16px;
  background-color: transparent;
  border: 1px solid var(--articles-border);
  border-radius: 6px;
  color: var(--articles-text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 30px;
}

.article-back-btn:hover {
  background-color: var(--articles-bg);
  border-color: var(--articles-accent);
  color: var(--articles-accent);
}

.article-detail {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-detail-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-detail-category {
  display: inline-block;
  width: fit-content;
  background-color: var(--articles-accent);
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.article-detail-title {
  font-size: 2.2rem;
  margin: 0;
  color: var(--articles-text);
  line-height: 1.3;
  font-weight: 700;
}

.article-detail-excerpt {
  font-size: 1.1rem;
  margin: 0;
  color: var(--articles-text-secondary);
  line-height: 1.6;
}

.article-detail-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background-color: var(--articles-bg);
  border-radius: 8px;
  flex-wrap: wrap;
  gap: 20px;
}

.meta-group {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.meta-item {
  font-size: 0.95rem;
  color: var(--articles-text-secondary);
}

.meta-item strong {
  color: var(--articles-brand);
}

.article-detail-favorite {
  padding: 10px 16px;
  background-color: white;
  border: 2px solid var(--articles-accent);
  border-radius: 6px;
  color: var(--articles-accent);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.article-detail-favorite:hover {
  background-color: var(--articles-accent);
  color: white;
}

.article-detail-favorite.active {
  background-color: var(--articles-accent);
  color: white;
}

.article-detail-image {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 10px;
}

.article-detail-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--articles-text);
}

.article-tags {
  padding: 20px;
  background-color: var(--articles-bg);
  border-radius: 8px;
}

.article-tags strong {
  display: block;
  margin-bottom: 12px;
  color: var(--articles-text);
}

.tags-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  background-color: var(--articles-card-bg);
  border: 1px solid var(--articles-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--articles-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tag:hover {
  border-color: var(--articles-accent);
  color: var(--articles-accent);
  background-color: rgba(140, 198, 63, 0.05);
}

/* ==================== ARTÍCULOS RELACIONADOS ====================*/
.article-related {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 2px solid var(--articles-border);
}

.article-related h2 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--articles-text);
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* ==================== RESPONSIVIDAD ====================*/
@media (max-width: 1024px) {
  .articles-main-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .articles-sidebar {
    position: static;
  }

  .articles-header-content h1 {
    font-size: 2rem;
  }

  .featured-articles-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .articles-header {
    padding: 40px 20px;
    margin-bottom: 30px;
  }

  .articles-header-content h1 {
    font-size: 1.5rem;
  }

  .articles-header-content p {
    font-size: 1rem;
  }

  .articles-main-content {
    padding: 0 15px;
    gap: 20px;
  }

  .articles-sidebar {
    gap: 20px;
  }

  .articles-view-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .articles-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
  }

  .articles-grid.list-view {
    grid-template-columns: 1fr;
  }

  .articles-grid.list-view .article-card {
    flex-direction: column;
  }

  .articles-grid.list-view .article-card-image {
    width: 100%;
    height: 160px;
  }

  .featured-articles-grid {
    grid-template-columns: 1fr;
  }

  .featured-article-content {
    padding: 16px;
  }

  .featured-article-content h3 {
    font-size: 1.1rem;
  }

  .article-detail-title {
    font-size: 1.8rem;
  }

  .article-detail-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-group {
    width: 100%;
  }

  .article-detail-favorite {
    width: 100%;
    text-align: center;
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .articles-header-content h1 {
    font-size: 1.2rem;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .articles-section h2,
  .articles-featured h2,
  .article-related h2 {
    font-size: 1.2rem;
  }

  .article-card-title {
    font-size: 0.95rem;
  }

  .article-detail-title {
    font-size: 1.5rem;
  }

  .article-detail-meta {
    padding: 16px;
  }

  .meta-item {
    font-size: 0.9rem;
  }

  .filter-title {
    font-size: 0.85rem;
  }

  .filter-checkbox {
    font-size: 0.85rem;
  }
}