/* Articles Page Specific Styles */

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--background-light) 0%, white 100%);
  padding: 4rem 0 2rem;
  text-align: center;
}

.article-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 3rem 0 0;
  flex-wrap: wrap;
}

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

.stat-item .stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-item .stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Search and Filter Section */
.search-filter-section {
  background: var(--background-white);
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-color);
}

.search-filter-container {
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 1rem;
}

.search-container {
  position: relative;
  flex: 1;
  min-width: 300px;
}

.search-input {
  width: 100%;
  padding: 1rem 3rem 1rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-button {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.search-button:hover {
  color: var(--primary-color);
  background: var(--background-light);
}

.filter-container {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--border-color);
  background: var(--background-white);
  color: var(--text-secondary);
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

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

.sort-container {
  min-width: 200px;
}

.sort-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--background-white);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
}

.sort-select:focus {
  border-color: var(--primary-color);
}

.results-counter {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Articles Section */
.articles-section {
  padding: 3rem 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

/* Enhanced Article Cards */
.article-card {
  background: var(--background-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

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

.article-image {
  height: 200px;
  overflow: hidden;
  position: relative;
}

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

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

.article-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.article-category {
  background: var(--background-light);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-featured {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.article-excerpt {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.read-time::before {
  content: "📖 ";
}

.article-date::before {
  content: "📅 ";
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  background: var(--background-light);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 500;
}

.article-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  margin-top: auto;
}

.article-link:hover {
  color: var(--secondary-color);
  transform: translateX(2px);
}

.article-link::after {
  content: "→";
  margin-left: 0.5rem;
  transition: var(--transition);
}

/* No Results */
.no-results {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--background-light);
  border-radius: var(--border-radius-lg);
  margin-top: 2rem;
}

.no-results-content h3 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.no-results-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.clear-filters-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.clear-filters-btn:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .search-filter-container {
    flex-direction: column;
    align-items: stretch;
  }

  .search-container {
    min-width: auto;
  }

  .filter-container {
    justify-content: center;
  }

  .sort-container {
    min-width: auto;
  }

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

  .article-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

  .stat-item .stat-number {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .page-header {
    padding: 2rem 0 1rem;
  }

  .search-filter-section {
    padding: 1rem 0;
  }

  .search-filter-container {
    gap: 1rem;
  }

  .filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .article-content {
    padding: 1rem;
  }

  .article-title {
    font-size: 1.125rem;
  }

  .no-results {
    padding: 2rem 1rem;
  }
}

/* Animation for filtered results */
.article-card.fade-out {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.article-card.fade-in {
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Loading state */
.articles-grid.loading {
  opacity: 0.6;
  pointer-events: none;
}

.articles-grid.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}