/* ── article.css ── */

/* Reading Progress Bar */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--color-green);
  z-index: 2000;
  width: 0%;
  transition: width 0.1s linear;
}

/* Article Header */
.article-header {
  background: var(--color-navy);
  padding: 140px 0 60px;
  color: white;
}
.article-breadcrumb { margin-bottom: 20px; }
.article-breadcrumb a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.article-breadcrumb a:hover { color: white; }
.article-badges { display: flex; gap: 8px; margin-bottom: 16px; }
.article-title {
  color: white;
  max-width: 760px;
  margin-bottom: 16px;
}
.article-deck {
  color: rgba(255,255,255,0.75);
  font-size: 1.1rem;
  max-width: 700px;
  line-height: 1.65;
  margin-bottom: 20px;
}
.article-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-rule {
  height: 2px;
  background: var(--color-teal);
  width: 80px;
  border-radius: 100px;
}

/* Article Layout */
.article-main { padding: 60px 0 80px; }
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}
@media (max-width: 1024px) { .article-layout { grid-template-columns: 1fr; } }

/* Article Body */
.article-body { max-width: 700px; }
.article-body h2 {
  margin: 36px 0 16px;
  font-size: 1.4rem;
}
.article-body h3 {
  margin: 28px 0 12px;
  font-size: 1.15rem;
}
.article-body p { margin-bottom: 18px; color: var(--color-ink); line-height: 1.8; }
.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 18px;
}
.article-body li { margin-bottom: 8px; line-height: 1.7; }
.article-body ul li { list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body strong { font-weight: 600; }
.article-body a { color: var(--color-teal); text-decoration: underline; }
.article-body blockquote {
  border-left: 4px solid var(--color-teal);
  padding: 16px 20px;
  margin: 24px 0;
  background: var(--color-teal-pale);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-navy);
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
@media (max-width: 1024px) {
  .article-sidebar { display: none; }
}
.toc-card {
  background: var(--color-linen);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
}
.toc-card h4 { margin-bottom: 16px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); }
.toc-nav { display: flex; flex-direction: column; gap: 8px; }
.toc-link {
  font-size: 0.85rem;
  color: var(--color-muted);
  transition: color var(--transition);
  display: block;
  line-height: 1.4;
}
.toc-link:hover { color: var(--color-teal); }
.toc-link.toc-h3 { padding-left: 12px; font-size: 0.8rem; }
.toc-link.active { color: var(--color-teal); font-weight: 600; }

.sidebar-cta h4 { margin-bottom: 8px; }
.sidebar-cta p { font-size: 0.85rem; color: var(--color-muted); }

/* Footer Area */
.article-footer-area { max-width: 700px; margin-top: 48px; }
.article-share {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 48px;
  font-size: 0.9rem;
  font-weight: 600;
  flex-wrap: wrap;
}

/* Related Articles */
.related-articles { margin-bottom: 48px; }
.related-articles h3 { margin-bottom: 24px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 768px) { .related-grid { grid-template-columns: 1fr; } }
.related-card {
  background: var(--color-linen);
  border-radius: var(--radius-md);
  padding: 20px;
  text-decoration: none;
  color: var(--color-ink);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.related-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.related-card h4 { font-size: 0.9rem; line-height: 1.35; }
.related-card .badge { font-size: 0.7rem; width: fit-content; }
.related-card-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-muted); }

/* CTA Banner */
.article-cta-banner {
  background: var(--color-navy);
  border-radius: var(--radius-xl);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  color: white;
}
.article-cta-banner h3 { color: white; margin-bottom: 8px; }
.article-cta-banner p { color: rgba(255,255,255,0.7); font-size: 0.95rem; margin: 0; }