.article-layout { display: grid; grid-template-columns: 280px 1fr; gap: 32px; padding: 40px 0; }
.article-sidebar { position: sticky; top: 80px; align-self: start; height: max-content; }
.article-sidebar .toc-card { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: 18px; box-shadow: var(--box-shadow); }
.toc-title { margin: 0 0 12px 0; font-size: 13px; font-weight: 800; color: var(--text-light); letter-spacing: .08em; text-transform: uppercase; }
.article-toc { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.article-toc a { color: var(--text-secondary); text-decoration: none; font-size: 14px; display: block; padding: 6px 10px; border-radius: 6px; transition: var(--transition); }
.article-toc a:hover { color: var(--text-primary); background-color: var(--bg-accent); }
.article-toc .active > a { color: var(--primary-color); font-weight: 600; background-color: rgba(var(--primary-rgb), 0.08); }
.article-toc .toc-h3 { padding-left: 14px; }

.article-content { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: 32px; box-shadow: var(--box-shadow); }
.article-content h2 { margin-top: 26px; margin-bottom: 14px; font-size: 26px; line-height: 1.25; letter-spacing: -0.2px; color: var(--text-primary); }
.article-content h3 { margin-top: 18px; margin-bottom: 10px; color: var(--text-primary); font-size: 18px; }
.article-content p { color: var(--text-secondary); line-height: 1.8; font-size: 16px; }
.article-content ul, .article-content ol { padding-left: 20px; margin: 8px 0 14px; color: var(--text-secondary); }
.article-content li { margin: 6px 0; line-height: 1.8; font-size: 16px; }
.article-content a { color: var(--primary-color); text-decoration: none; }
.article-content a:hover { text-decoration: underline; }
.article-content .anchor-offset { scroll-margin-top: 100px; }

/* Muted metadata (effective date, etc.) */
.article-content .text-muted { color: var(--text-light); font-size: 14px; }

@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 20px; }
  .article-sidebar { position: static; order: -1; }
  .article-content { padding: 24px; }
}