/* ============================================
   Post (Article) Page
   ============================================ */
.post-article {
  max-width: 800px;
  margin: 0 auto;
  padding: calc(var(--nav-height) + 36px) 24px 48px;
}

.post-article-header {
  margin-bottom: 32px;
}

.post-article-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.post-article-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.4;
  margin-bottom: 8px;
}

.post-article-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  font-weight: 400;
  margin-bottom: 12px;
}

.post-article-meta {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.post-article-content {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--text);
}

.post-article-content h1,
.post-article-content h2,
.post-article-content h3,
.post-article-content h4 {
  color: var(--primary);
  margin-top: 32px;
  margin-bottom: 16px;
  font-weight: 700;
}

.post-article-content h2 {
  font-size: 1.5rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.post-article-content h3 {
  font-size: 1.25rem;
}

.post-article-content p {
  margin-bottom: 20px;
}

.post-article-content blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(41, 170, 221, 0.04);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-light);
}

.post-article-content code {
  font-family: var(--font-mono);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

[data-theme="dark"] .post-article-content code {
  background: #4a5568;
}

.post-article-content pre {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 20px 0;
}

[data-theme="dark"] .post-article-content pre {
  background: #0d1117;
}

.post-article-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.post-article-content img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 20px 0;
}

/* ============================================
   Post Navigation
   ============================================ */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.post-nav-item {
  flex: 1;
  padding: 16px 20px;
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.post-nav-item:hover {
  box-shadow: var(--shadow-hover);
}

.post-nav-item.next {
  text-align: right;
}

.post-nav-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

@media (max-width: 576px) {
  .post-nav {
    flex-direction: column;
  }
}

/* ============================================
   Side Catalog (for post pages)
   ============================================ */
.side-catalog {
  position: sticky;
  top: 80px;
}

.side-catalog h5 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.catalog-body {
  list-style: none;
  padding: 0;
}

.catalog-body li {
  margin-bottom: 4px;
}

.catalog-body a {
  display: block;
  padding: 4px 12px;
  font-size: 0.85rem;
  color: var(--text-light);
  border-left: 2px solid transparent;
  border-radius: 0;
  transition: var(--transition);
}

.catalog-body a:hover,
.catalog-body .active a {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(41, 170, 221, 0.04);
}

.h2_nav a { padding-left: 12px; }
.h3_nav a { padding-left: 24px; font-size: 0.82rem; }
.h4_nav a { padding-left: 36px; font-size: 0.8rem; }