/* Articles Page Styles */

.articles-page {
  padding-top: 8rem;
  min-height: 100vh;
  scroll-behavior: smooth;
}

.articles-header {
  margin-bottom: 3rem;
}

.articles-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.articles-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 500px;
}

.articles-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
}

.articles-sidebar {
  position: sticky;
  top: 6rem;
  height: fit-content;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.sidebar-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.topic-btn {
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.topic-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.topic-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
}

.articles-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
}

.article-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.article-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.article-card.active {
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.article-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--accent);
}

.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.article-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
}

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

.article-tag {
  font-size: 0.7rem;
  padding: 0.25rem 0.5rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius-sm);
}

.article-empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Article View (Full Article) */
.article-view {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  scroll-margin-top: 6rem;
}

.article-view.visible {
  display: block;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  transition: color var(--transition-fast);
  position: relative;
  z-index: 1;
}

.article-back:hover {
  color: var(--accent);
}

.article-full-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-full-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.article-full-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.article-full-content p {
  margin-bottom: 1.25rem;
}

.article-full-content p:last-child {
  margin-bottom: 0;
}

.article-full-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.article-full-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.article-full-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.2rem 0.4rem;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  color: var(--accent);
}

.article-full-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-full-content a:hover {
  text-decoration: none;
}

.article-figure {
  margin: 1.5rem 0;
}

.article-figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.article-figure figcaption {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.5rem;
}

/* Share Card */
.share-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--accent);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.share-card-btn:hover {
  background: rgba(224, 122, 95, 0.25);
  border-color: var(--accent);
}

/* Responsive */
@media (max-width: 900px) {
  .articles-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .articles-sidebar {
    position: static;
  }
  
  .sidebar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  
  .topic-btn {
    width: auto;
    padding: 0.4rem 0.75rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
  }
}

@media (max-width: 640px) {
  .articles-page {
    padding-top: 7rem;
  }
  
  .article-view {
    padding: 1.25rem;
  }
  
  .article-full-title {
    font-size: 1.35rem;
  }
  
  .article-full-content {
    font-size: 0.95rem;
  }
}