/* ============================================================
   M3U Edit — Blog article (single post)
   ============================================================ */

.article-page {
  background: var(--bg);
  padding-bottom: var(--space-16, 4rem);
}

/* Reading progress */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 100;
  pointer-events: none;
}

.reading-progress-bar {
  height: 100%;
  width: 0;
  background: var(--gradient-primary, linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899));
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.45);
  transition: width 100ms linear;
}

/* Hero */
.article-hero {
  padding: var(--space-8, 2rem) 0 var(--space-6, 1.5rem);
  border-bottom: 1px solid var(--border);
  background: var(--gradient-mesh, linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg) 100%));
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  margin-bottom: var(--space-4, 1rem);
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

.breadcrumb-sep {
  color: var(--text-muted);
  opacity: 0.6;
}

.article-category {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full, 9999px);
  background: color-mix(in srgb, var(--cat-color, var(--primary)) 15%, transparent);
  color: var(--cat-color, var(--primary));
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  margin-bottom: var(--space-3, 0.75rem);
}

.article-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-3, 0.75rem);
  color: var(--text);
}

.article-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 var(--space-5, 1.25rem);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-meta a.article-author {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.article-meta a.article-author:hover {
  color: var(--primary);
}

.meta-divider {
  opacity: 0.45;
}

.article-hero-image {
  max-width: 960px;
  margin: var(--space-6, 1.5rem) auto 0;
  padding: 0 24px;
}

.article-hero-image img,
.article-hero-image picture,
.article-hero-image picture img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: center center;
  border-radius: var(--radius-2xl, 1.25rem);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
  display: block;
}

.article-hero-image img[src*="thumbnails/auto"],
.article-hero-image picture img[src*="thumbnails/auto"] {
  object-fit: contain;
  max-height: 400px;
  background: var(--bg-secondary);
}

/* Article layout */
.article-layout-wrap {
  max-width: 1100px;
  margin: var(--space-8, 2rem) auto 0;
  padding: 0 24px;
}

.article-layout {
  display: grid;
  grid-template-columns: 52px minmax(0, 220px) minmax(0, 1fr);
  gap: var(--space-6, 1.5rem);
  align-items: start;
}

@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

/* Share rail */
.article-share-rail {
  position: sticky;
  top: 5.5rem;
}

@media (max-width: 960px) {
  .article-share-rail {
    display: none;
  }
}

.share-sticky {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.share-label {
  font-size: 0.625rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  writing-mode: vertical-lr;
  transform: rotate(180deg);
}

.share-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--duration-fast, 200ms);
}

.share-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* TOC */
.article-toc {
  position: sticky;
  top: 5.5rem;
}

@media (max-width: 960px) {
  .article-toc {
    display: none;
  }
}

.article-toc-title {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 var(--space-3, 0.75rem);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}

.toc-item {
  margin: 0;
}

.toc-item a {
  display: block;
  padding: 0.35rem 0 0.35rem 0.85rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  line-height: 1.4;
  transition: color var(--duration-fast, 200ms);
}

.toc-item.toc-h3 a {
  padding-left: 1.25rem;
  font-size: 0.75rem;
}

.toc-item a:hover,
.toc-item a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
}

/* Mobile TOC */
.article-toc-mobile {
  display: none;
  margin-bottom: var(--space-4, 1rem);
}

@media (max-width: 960px) {
  .article-toc-mobile {
    display: block;
  }
}

.toc-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text);
  cursor: pointer;
}

.article-toc-mobile .toc-list {
  display: none;
  margin-top: 0.5rem;
  padding: 0.5rem 0;
}

.article-toc-mobile.is-open .toc-list {
  display: block;
}

/* Article body typography */
.article-body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--text);
  max-width: 720px;
}

.article-body p {
  margin: 0 0 1.5rem;
}

.article-body h2 {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 3rem 0 1.25rem;
  scroll-margin-top: 6rem;
  color: var(--text);
}

.article-body h3 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 2.5rem 0 1rem;
  scroll-margin-top: 6rem;
}

.article-body img {
  width: 100%;
  border-radius: 12px;
  margin: 2rem 0;
}

.article-body figure figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.article-body a {
  color: var(--primary-600, var(--primary));
  border-bottom: 1px solid rgba(139, 92, 246, 0.35);
  text-decoration: none;
  font-weight: 500;
}

.article-body a:hover {
  border-bottom-color: currentColor;
}

.article-body blockquote {
  border-left: 4px solid var(--primary-500, var(--primary));
  background: var(--primary-50, rgba(99, 102, 241, 0.06));
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 12px 12px 0;
  font-style: italic;
  font-size: 1.0625rem;
}

[data-theme='dark'] .article-body blockquote {
  background: rgba(99, 102, 241, 0.12);
}

.article-body code {
  background: var(--bg-secondary);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: 'JetBrains Mono', 'Consolas', monospace;
}

.article-body pre {
  background: #0f172a;
  color: #f1f5f9;
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 2rem 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
}

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

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body .callout,
.article-body .callout-info,
.article-body .callout-warning,
.article-body .callout-tip {
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  margin: 2rem 0;
  border-left: 4px solid;
}

.article-body .callout-info {
  background: rgba(59, 130, 246, 0.06);
  border-color: #3b82f6;
}

.article-body .callout-warning {
  background: rgba(245, 158, 11, 0.06);
  border-color: #f59e0b;
}

.article-body .callout-tip {
  background: rgba(16, 185, 129, 0.06);
  border-color: #10b981;
}

/* Inline CTA */
.article-inline-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  margin: 2.5rem 0;
  border-radius: var(--radius-xl, 14px);
  border: 1px solid rgba(99, 102, 241, 0.25);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(236, 72, 153, 0.06));
}

.article-inline-cta .cta-icon {
  font-size: 1.75rem;
}

.article-inline-cta .cta-content {
  flex: 1;
  min-width: 180px;
}

.article-inline-cta h4 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 700;
}

.article-inline-cta p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Tags + updated */
.article-footer-meta {
  margin-top: var(--space-8, 2rem);
  padding-top: var(--space-5, 1.25rem);
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-4, 1rem);
}

.article-tag {
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full, 9999px);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 600;
}

.article-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Share block (mobile + end) */
.article-share-block {
  margin: var(--space-8, 2rem) 0;
  padding: var(--space-5, 1.25rem);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl, 14px);
  text-align: center;
}

.article-share-block h3 {
  margin: 0 0 var(--space-4, 1rem);
  font-size: 1rem;
}

.share-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

/* Author bio */
.article-author-bio {
  display: flex;
  gap: var(--space-4, 1rem);
  padding: var(--space-5, 1.25rem);
  margin: var(--space-8, 2rem) 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl, 14px);
}

.author-avatar-lg {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  flex-shrink: 0;
  text-decoration: none;
}

.author-bio-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 700;
}

.author-bio-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.author-bio-name:hover {
  color: var(--primary);
}

.author-bio-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0.35rem 0 0;
}

/* Newsletter inline */
.article-newsletter {
  padding: var(--space-8, 2rem);
  border-radius: var(--radius-2xl, 1.25rem);
  background: var(--gradient-mesh);
  border: 1px solid var(--border);
  text-align: center;
  margin: var(--space-8, 2rem) 0;
}

.article-newsletter h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.article-newsletter p {
  color: var(--text-secondary);
  margin: 0 0 var(--space-4, 1rem);
  font-size: 0.9375rem;
}

/* Post nav */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4, 1rem);
  max-width: 1100px;
  margin: var(--space-10, 2.5rem) auto 0;
  padding: 0 24px;
}

@media (max-width: 600px) {
  .post-nav {
    grid-template-columns: 1fr;
  }
}

.post-nav a {
  display: block;
  padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg, 12px);
  background: var(--bg-card);
  text-decoration: none;
  transition: border-color var(--duration-fast, 200ms);
}

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

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

.nav-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.nav-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}

/* Related */
.related-articles {
  background: var(--bg-secondary);
  padding: var(--space-12, 3rem) 0;
  margin-top: var(--space-10, 2.5rem);
}

.section-title {
  text-align: center;
  font-size: 1.75rem;
  font-weight: 800;
  margin: 0 0 var(--space-8, 2rem);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5, 1.25rem);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reading-progress-bar,
  .share-btn {
    transition: none !important;
  }
}