/* Article Index Page Styles */

:root {
  --primary-color: #0078d7;
  --primary-light: #2b88d8;
  --primary-dark: #005a9e;
  --secondary-color: #f8f9fa;
  --accent-color: #ff6b6b;
  --text-color: #333;
  --text-light: #6c757d;
  --border-color: #dee2e6;
  --card-bg: #fff;
  --hover-bg: #f5f5f5;
  --tag-bg: #e9ecef;
  --tag-text: #495057;
  --success: #28a745;
  --box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.article-index-container {
  max-width: 1200px;
  margin: 28px auto;
  padding: 30px 20px;
}

/* Page header styles */
.page-header {
  margin-bottom: 30px;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-color);
  max-width: 700px;
  margin: 0 auto;
}

/* Article filters */
.article-filters {
  margin-bottom: 30px;
}

.filter-wrapper {
  background-color: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--box-shadow);
}

.search-box {
  display: flex;
  margin-bottom: 15px;
}

.search-box input {
  flex: 1;
  padding: 10px 15px;
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: 4px 0 0 4px;
  font-size: 16px;
}

.search-box button {
  padding: 0 15px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  transition: background-color 0.2s;
}

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

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.filter-group {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 200px;
}

.filter-group label {
  margin-right: 10px;
  font-weight: 500;
}

.filter-group select {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

/* Articles grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
  margin-bottom: 40px;
}

/* Article card styles */
.article-card {
  background-color: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid transparent;
  height: 100%;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-light);
}

.article-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.article-image {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
  background-color: #f0f0f0; /* Light placeholder background */
}

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

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0) 50%, rgba(0,0,0,0.5) 100%);
  opacity: 0.3;
  transition: opacity 0.3s ease;
}

.article-card:hover .image-overlay {
  opacity: 0.5;
}

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

.fallback-image {
  opacity: 0.8;
  object-fit: contain !important;
  padding: 20px;
}

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

.article-title {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--text-color);
  font-weight: 600;
  line-height: 1.4;
}

.article-excerpt {
  color: var(--text-color);
  margin-bottom: 15px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-meta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-light);
}

.article-date {
  display: flex;
  align-items: center;
  gap: 5px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.article-tag {
  background-color: var(--tag-bg);
  color: var(--tag-text);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  transition: background-color 0.2s ease;
}

.article-tag:hover {
  background-color: var(--primary-light);
  color: white;
}

/* Pagination styles */
.pagination {
  display: flex;
  justify-content: center;
  gap: 5px;
}

.pagination-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s;
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--hover-bg);
}

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

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

.pagination-ellipsis {
  display: flex;
  align-items: center;
  padding: 0 10px;
}

/* No results message */
.no-results {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 20px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: var(--box-shadow);
}

.no-results i {
  font-size: 3rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.no-results h3 {
  margin-bottom: 10px;
  font-size: 1.5rem;
}

.no-results p {
  margin-bottom: 20px;
  color: var(--text-light);
}

.btn-reset {
  padding: 10px 20px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-reset:hover {
  background-color: var(--primary-dark);
}

/* Article skeleton loading state */
.article-skeleton {
  background-color: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--box-shadow);
  position: relative;
  height: 350px;
}

.article-skeleton::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%,
    rgba(255, 255, 255, 0.2) 50%,
    transparent 100%
  );
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #3498db;
    --primary-light: #5dade2;
    --primary-dark: #2980b9;
    --secondary-color: #2c3e50;
    --text-color: #ecf0f1;
    --text-light: #bdc3c7;
    --border-color: #34495e;
    --card-bg: #1a1a1a;
    --hover-bg: #2c2c2c;
    --tag-bg: #34495e;
    --tag-text: #ecf0f1;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  }

  .article-card {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  }

  .search-box input {
    background-color: #2c2c2c;
    color: var(--text-color);
  }

  .filter-group select {
    background-color: #2c2c2c;
    color: var(--text-color);
  }

  .article-image {
    background-color: #333; /* Darker placeholder background for dark mode */
  }
  
  .fallback-image {
    opacity: 0.6;
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .page-header h1 {
    font-size: 2rem;
  }
  
  .filter-group {
    flex: 100%;
  }
  
  .articles-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 576px) {
  .page-header h1 {
    font-size: 1.8rem;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .article-image {
    height: 160px;
  }
}

/* Improved responsiveness */
@media (max-width: 992px) {
  .filter-options {
    flex-direction: column;
  }
  
  .filter-group {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .article-index-container {
    padding: 20px 10px;
  }
  
  .article-title {
    font-size: 1.1rem;
  }
  
  .article-image {
    height: 140px;
  }
  
  .pagination-btn {
    width: 35px;
    height: 35px;
  }
}

/* Accessibility improvements */
.search-box input:focus,
.filter-group select:focus,
.pagination-btn:focus,
.btn-reset:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

nav {        background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
  transition: background-color 0.3s ease;}
  .nav-menu li a {
    position: relative;
    text-decoration: none;
    color: #007acc;
}
  .nav-menu li a:hover {
    color: #005a9e;
  }
  .nav-menu li a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background-color: #007acc;
    transform: scaleX(0);
    transition: transform 0.3s ease;
  }
  .nav-menu li a:hover::after {
    transform: scaleX(1);
  }
  .nav-menu li a.active::after {
    transform: scaleX(1);
  }
  .nav-menu li a.active {
    color: #005a9e;
  }
  .nav-menu li a.active::after {
    background-color: #005a9e;
  }
  .nav-menu li a.active:hover::after {
    background-color: #007acc;
  }
  .nav-menu li a.active:hover {
    color: #005a9e;
  }
  .nav-menu li a:focus {
    outline: 2px solid #005a9e;
    outline-offset: 2px;
  }
  .nav-menu li a:focus::after {
    transform: scaleX(1);
  }
  nav {
    position: fixed;
    width: 100%;
}