/* ==========================================================================
   KOUKE Blog — Single Post (文章详情页)
   ========================================================================== */

@import url('blog-archive.css');

.blog-single-page {
  background: #ffffff;
}

/* Hero */
.blog-single-hero {
  padding: var(--space-lg) 0;
  background: var(--color-bg-body);
}

.blog-single-hero-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.blog-single-hero-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl);
}

.blog-single-page .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}

.blog-single-page .breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.blog-single-page .breadcrumb a:hover {
  color: var(--color-primary);
}

.blog-single-page .breadcrumb i {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.blog-single-title {
  font-family: var(--font-family-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
  margin: 0 0 var(--space-sm) 0;
  line-height: var(--line-height-tight);
  max-width: 52rem;
}

.blog-single-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.blog-single-meta time {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.blog-single-meta .meta-categories a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
}

.blog-single-meta .meta-categories a:hover {
  text-decoration: underline;
}

/* Featured image */
.blog-single-featured {
  margin-top: var(--space-md);
}

.blog-single-featured img {
  width: 100%;
  max-height: 320px;
  height: 320px;
  display: block;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* Article body */
.blog-single-body {
  padding-bottom: var(--space-2xl);
}

.blog-single-body-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ==========================================================================
   Article Layout (参考代码的三栏结构，但使用 KOUKE 设计令牌)
   ========================================================================== */

.article-detail-section {
  padding: var(--space-2xl) 0;
  background: #ffffff;
}

.article-detail-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 100px;
}

.article-toc {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.toc-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  margin: 0;
  font-family: var(--font-family-heading);
  font-size: var(--text-lg);
  color: var(--color-text-main);
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--color-border);
}

.toc-title i {
  color: var(--color-primary);
  transition: transform 0.2s ease;
}

.toc-title.collapsed i {
  transform: rotate(-90deg);
}

.toc-nav {
  padding: var(--space-md) var(--space-lg);
  max-height: calc(100vh - 220px);
  overflow: auto;
}

.toc-nav.collapsed {
  display: none;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-item-sub {
  padding-left: 14px;
}

.toc-link {
  display: block;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  line-height: var(--line-height-base);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.toc-link:hover {
  background: var(--color-primary-alpha);
  color: var(--color-primary);
}

.toc-link.active {
  background: var(--color-primary-light);
  color: var(--color-primary-active);
  font-weight: var(--font-weight-bold);
}

.article-content {
  min-width: 0;
}

.article-main-title {
  font-family: var(--font-family-heading);
  font-size: var(--text-3xl);
  color: var(--color-primary);
  margin: 0 0 var(--space-lg) 0;
  line-height: var(--line-height-tight);
}

@media (max-width: 1200px) {
  .article-detail-container {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: var(--space-xl);
  }
}

@media (max-width: 1024px) {
  .article-detail-container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .article-sidebar {
    position: static;
    top: auto;
  }
}

@media (max-width: 480px) {
  .inquiry-box-article-detail {
    padding: var(--space-lg);
  }
}

.post-content {
  font-size: var(--text-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-main);
}

.post-content > *:first-child {
  margin-top: 0;
}

.post-content p {
  margin-bottom: var(--space-md);
  color: var(--color-text-main);
}

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-family-heading);
  color: var(--color-text-main);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.post-content h2 {
  font-size: var(--text-2xl);
}

.post-content h3 {
  font-size: var(--text-xl);
}

.post-content ul,
.post-content ol {
  margin: 0 0 var(--space-md) var(--space-lg);
  padding: 0;
}

.post-content li {
  margin-bottom: var(--space-sm);
}

.post-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-content a:hover {
  color: var(--color-primary-hover);
}

.post-content blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-body);
  font-style: italic;
  color: var(--color-text-muted);
}

.post-content img,
.post-content figure {
  max-width: 100%;
  height: auto;
}

.post-content figure {
  margin: var(--space-lg) 0;
}

.post-content figcaption {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  text-align: center;
}

.post-content .wp-block-image,
.post-content .alignwide,
.post-content .alignfull {
  margin-left: 0;
  margin-right: 0;
}

.post-content .page-links {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.post-content .page-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  margin: 0 4px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.post-content .page-links a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Tags */
.blog-single-tags {
  max-width: 800px;
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.blog-single-tags-label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
}

.blog-single-tags a {
  display: inline-block;
  padding: 6px 14px;
  font-size: var(--text-sm);
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: var(--transition-base);
}

.blog-single-tags a:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* Prev / Next */
.post-navigation {
  max-width: var(--container-max-width);
  margin: var(--space-2xl) auto 0;
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.post-nav-link {
  display: block;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: var(--transition-base);
}

.post-nav-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

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

.post-nav-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
}

.post-nav-title {
  font-family: var(--font-family-heading);
  font-size: var(--text-lg);
  color: var(--color-text-main);
}

.post-nav-link:hover .post-nav-title {
  color: var(--color-primary);
}

/* Related posts */
.blog-related {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-body);
}

.blog-related .container {
  max-width: var(--container-max-width);
}

.blog-related-title {
  font-family: var(--font-family-heading);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin: 0 0 var(--space-xl) 0;
  text-align: left;
}

@media (max-width: 768px) {
  .blog-single-title {
    font-size: var(--text-3xl);
  }

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

  .post-nav-link--next {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .blog-single-title {
    font-size: var(--text-2xl);
  }
}