/* ── Site Navigation ── */
.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  margin-bottom: 1.5rem;
  border-bottom: var(--border);
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-brand:hover { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* ── Blog Header ── */
.blog-header {
  margin-bottom: 2rem;
}

.blog-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.blog-header .subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

/* ── Category Filters ── */
.blog-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.4rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

.filter-btn.active {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
  font-weight: 700;
}

/* ── Post Cards (List View) ── */
.blog-posts {
  display: grid;
  gap: 1.5rem;
}

.post-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  background: var(--bg-surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: var(--border);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.post-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.post-card-body {
  padding: 1.25rem 1.25rem 1.25rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.post-card-category {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.post-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.post-card-excerpt {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.post-card-tags {
  display: flex;
  gap: 0.25rem;
}

.post-tag {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

/* ── Single Post View ── */
.blog-post-single {
  max-width: 800px;
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  cursor: pointer;
  transition: color 0.2s;
}

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

.post-hero-image {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

.post-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: var(--border);
}

.post-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.post-content h2 {
  color: var(--text-primary);
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.post-content h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.post-content p {
  margin-bottom: 1rem;
}

.post-content strong {
  color: var(--text-primary);
}

.post-content em {
  color: var(--accent);
  font-style: italic;
}

.post-content code {
  background: var(--bg-elevated);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--info);
}

.post-content pre {
  background: var(--bg-surface);
  border: var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.post-content ul, .post-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.4rem;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1.25rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .post-card {
    grid-template-columns: 1fr;
  }

  .post-card-body {
    padding: 1.25rem;
  }

  .post-card-image {
    height: 180px;
  }

  .post-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 640px) {
  .site-nav {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

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