/**
 * 部落格文章共用版型（所有 blog/*.html 共用）。
 * 色彩一律引用 tokens.css 變數；共用 nav/footer 樣式在 site.css。
 */

/* Article Hero */
.article-hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 24px 40px;
}
.article-category {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}
.article-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--color-ink-primary);
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-ink-tertiary);
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border-subtle);
}

/* Category Colors */
.cat-ai-chat {
  color: var(--color-category-chat);
}
.cat-ai-art {
  color: var(--color-category-art);
}
.cat-dev-tool {
  color: var(--color-category-dev);
}
.cat-productivity {
  color: var(--color-category-productivity);
}
.cat-comparison {
  color: var(--color-category-comparison);
}
.cat-music {
  color: var(--color-category-music);
}
.cat-writing {
  color: var(--color-category-writing);
}
.cat-ai-video {
  color: var(--color-category-video);
}
.cat-ai-trend {
  color: var(--color-category-trend);
}

/* Article Content */
.article-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 40px;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--color-ink-primary);
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink-primary);
  margin: 48px 0 16px;
  letter-spacing: -0.01em;
}
.article-content h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--color-ink-primary);
  margin: 32px 0 12px;
}
.article-content p {
  margin-bottom: 20px;
}
.article-content ul,
.article-content ol {
  margin: 16px 0 20px 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content a {
  color: var(--color-brand-link);
  text-decoration: none;
}
.article-content a:hover {
  text-decoration: underline;
}
.article-content blockquote {
  border-left: 3px solid var(--color-ink-tertiary);
  padding: 12px 24px;
  margin: 24px 0;
  background: var(--color-surface-subtle);
  border-radius: 0 8px 8px 0;
  color: var(--color-ink-secondary);
}
.article-content code {
  background: var(--color-surface-subtle);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.9em;
}
.article-content .highlight-box {
  background: var(--color-surface-subtle);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
}
.article-content th {
  background: var(--color-surface-subtle);
  color: var(--color-ink-primary);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border-subtle);
}
.article-content th:first-child {
  border-radius: 8px 0 0 0;
}
.article-content th:last-child {
  border-radius: 0 8px 0 0;
}
.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.article-content tr:hover td {
  background: var(--color-surface-subtle);
}

/* Related */
.related-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 32px;
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 32px;
}
.related-section h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-ink-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.related-item {
  display: block;
  text-decoration: none;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border-subtle);
  transition: opacity 0.2s;
}
.related-item:hover {
  opacity: 0.6;
}
.related-item .related-cat {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}
.related-item .related-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-ink-primary);
  line-height: 1.4;
}
.back-link {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 48px;
}
.back-link a {
  color: var(--color-brand-link);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}
.back-link a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .article-hero {
    padding: 88px 20px 32px;
  }
  .article-hero h1 {
    font-size: 1.5rem;
  }
  .article-content {
    padding: 32px 20px 32px;
  }
  .article-content table {
    font-size: 0.8rem;
  }
  .article-content th,
  .article-content td {
    padding: 8px 10px;
  }
}

.article-meta {
  flex-wrap: wrap;
}
.article-meta a {
  color: var(--color-brand-link);
  text-decoration: none;
}
.article-hero > a {
  text-decoration: none;
  display: inline-block;
}
.article-lead {
  font-size: 1.2rem;
  color: var(--color-ink-secondary);
}
.article-content pre {
  padding: 22px;
  background: var(--color-surface-subtle);
  border-radius: 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
  line-height: 1.9;
  margin: 22px 0;
}
.article-content .table-scroll {
  overflow-x: auto;
  margin: 24px 0;
}
.table-scroll table {
  min-width: 460px;
  margin: 0;
}
.article-note {
  border-top: 1px solid var(--color-border-default);
  margin-top: 40px;
  padding-top: 24px;
  font-size: 0.85rem;
  color: var(--color-ink-secondary);
}
.article-note p {
  margin: 8px 0;
}
.calculation {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 24px;
  border-radius: 12px;
  background: var(--color-surface-subtle);
  margin: 24px 0;
  font-size: 1.1rem;
}
.calculation strong {
  font-size: 2rem;
  color: var(--color-brand-link);
}
.article-content img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}