/* ===== Blog Styles ===== */

/* Blog Hero */
.blog-hero {
  padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-3xl);
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.blog-hero .container {
  position: relative;
  z-index: 1;
}

.blog-hero-content {
  max-width: 640px;
}

.blog-hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.blog-hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Tag Filter */
.blog-filters {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
}

.filter-btn {
  padding: 0.375rem 1rem;
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.filter-btn.active {
  color: #ffffff;
  background: var(--gradient-primary);
  border-color: transparent;
}

/* Post Cards */
.blog-grid {
  display: grid;
  gap: var(--spacing-xl);
}

.post-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.06), transparent);
  transition: left 0.6s ease;
}

.post-card:hover::before {
  left: 100%;
}

.post-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.post-card.featured {
  border-color: rgba(139, 92, 246, 0.2);
}

.post-card.featured:hover {
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 0 0 40px rgba(139, 92, 246, 0.15);
}

.post-card-body {
  min-width: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.post-meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-tertiary);
  flex-shrink: 0;
}

.post-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.post-card:hover .post-title {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.post-excerpt {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.post-tag {
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-sm);
}

.post-card-arrow {
  flex-shrink: 0;
  color: var(--text-tertiary);
  transition: all var(--transition-base);
  margin-top: 0.25rem;
}

.post-card:hover .post-card-arrow {
  color: #3b82f6;
  transform: translate(4px, -4px);
}

/* Featured badge */
.post-featured-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.65rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--gradient-primary);
  color: #ffffff;
  border-radius: var(--radius-sm);
}

/* Empty state */
.blog-empty {
  text-align: center;
  padding: var(--spacing-3xl) 0;
  color: var(--text-tertiary);
  font-size: 1.125rem;
}

/* Coming Soon */
.blog-coming-soon {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-xl);
  max-width: 480px;
  margin: 0 auto;
}

.coming-soon-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  color: #3b82f6;
  margin-bottom: var(--spacing-xl);
}

.coming-soon-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.coming-soon-text {
  font-size: 1.05rem;
  color: var(--text-tertiary);
  line-height: 1.7;
}

/* ===== Article Page ===== */
.article-header {
  padding: calc(var(--spacing-3xl) + 80px) 0 var(--spacing-2xl);
  position: relative;
}

.article-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(139, 92, 246, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.article-header .container {
  position: relative;
  z-index: 1;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xl);
  transition: color var(--transition-base);
}

.article-back:hover {
  color: #3b82f6;
}

.article-back svg {
  transition: transform var(--transition-base);
}

.article-back:hover svg {
  transform: translateX(-4px);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.article-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

/* Article Body */
.article-body {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

.article-content h3 {
  font-size: 1.375rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.article-content p {
  margin-bottom: var(--spacing-lg);
}

.article-content a {
  color: #3b82f6;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(59, 130, 246, 0.3);
  transition: text-decoration-color var(--transition-base);
}

.article-content a:hover {
  text-decoration-color: #3b82f6;
}

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

.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.article-content li {
  margin-bottom: var(--spacing-xs);
}

.article-content li::marker {
  color: var(--text-tertiary);
}

.article-content blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-left: 3px solid #3b82f6;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary);
}

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

.article-content img {
  max-width: 100%;
  border-radius: var(--radius-lg);
  margin: var(--spacing-xl) 0;
  border: 1px solid var(--border-primary);
}

.article-content hr {
  border: none;
  height: 1px;
  background: var(--border-primary);
  margin: var(--spacing-2xl) 0;
}

/* Code Blocks */
.article-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: var(--radius-sm);
  color: #3b82f6;
}

.article-content pre {
  margin: var(--spacing-xl) 0;
  padding: 0;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

[data-theme="light"] .article-content pre {
  background: var(--bg-tertiary);
}

.article-content pre code {
  display: block;
  padding: var(--spacing-xl);
  background: none;
  border: none;
  border-radius: 0;
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
}

.code-label {
  display: block;
  padding: var(--spacing-sm) var(--spacing-xl);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-secondary);
}

[data-theme="light"] .code-label {
  background: rgba(0, 0, 0, 0.03);
}

/* Article Footer */
.article-footer {
  max-width: 720px;
  margin: 0 auto;
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--border-secondary);
}

.article-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.article-footer-back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.article-footer-back:hover {
  color: #3b82f6;
}

.article-footer-back:hover svg {
  transform: translateX(-4px);
}

.article-footer-back svg {
  transition: transform var(--transition-base);
}

/* Responsive */
@media (max-width: 768px) {
  .blog-hero {
    padding: calc(var(--spacing-2xl) + 80px) 0 var(--spacing-2xl);
  }

  .post-card {
    grid-template-columns: 1fr;
  }

  .post-card-arrow {
    display: none;
  }

  .post-title {
    font-size: 1.25rem;
  }

  .article-header {
    padding: calc(var(--spacing-2xl) + 80px) 0 var(--spacing-xl);
  }

  .article-content {
    font-size: 1rem;
  }
}