/* ============================================================
   ARTICLE LAYOUT — Fumadocs-style with sticky TOC
   ============================================================ */

/* Two-column: TOC sidebar + article content */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 40px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 80px 80px 48px;
  align-items: start;
}
@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 24px 64px;
  }
}

/* ─── Hero ─── */
.article-hero {
  position: relative;
  padding: 96px 0 48px;
  border-bottom: 1px solid var(--site-border);
  overflow: hidden;
}
.article-hero .hero-illustration {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  width: 60%;
  max-width: 480px;
  height: auto;
  opacity: 0.4;
  pointer-events: none;
  user-select: none;
}
@media (max-width: 768px) {
  .article-hero .hero-illustration {
    width: 90%;
    opacity: 0.25;
  }
}
.article-hero .container { max-width: 1080px; }
.article-hero .eyebrow { margin-bottom: 12px; }
.article-hero h1 {
  font: 700 clamp(28px, 5vw, 44px)/1.12 var(--q-font-display);
  letter-spacing: -0.02em;
  max-width: 720px;
  margin: 0;
}
.article-meta {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  font: 400 13px/1 var(--q-font-mono);
  letter-spacing: 0.04em;
  color: var(--site-muted);
}
.article-meta .dot {
  display: inline-block;
  width: 4px; height: 4px;
  background: var(--site-accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

/* ─── TOC Sidebar ─── */
.article-toc {
  position: sticky;
  top: 96px;
  padding-top: 48px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: none;
}
.article-toc::-webkit-scrollbar { display: none; }

.article-toc .toc-label {
  font: 600 10px/1 var(--q-font-display);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--site-muted);
  margin: 0 0 16px;
  padding-left: 12px;
}
.article-toc nav {
  border-left: 1px solid var(--site-border);
}
.article-toc a {
  display: block;
  font: 400 13px/1.4 var(--q-font-body);
  color: var(--site-muted);
  text-decoration: none;
  padding: 6px 0 6px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  transition: color var(--q-dur-fast) var(--q-ease), border-color var(--q-dur-fast) var(--q-ease);
}
.article-toc a:hover {
  color: var(--site-fg);
}
.article-toc a.active {
  color: var(--site-accent);
  border-left-color: var(--site-accent);
}
.article-toc a[data-depth="3"] {
  padding-left: 24px;
  font-size: 12px;
}

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

/* ─── Article Body ─── */
.article-body {
  padding-top: 48px;
  font: 400 17px/1.75 var(--q-font-body);
  color: var(--site-fg);
  min-width: 0;
}
.article-body h2 {
  font: 600 26px/1.2 var(--q-font-display);
  letter-spacing: -0.01em;
  margin: 56px 0 16px;
  padding-top: 8px;
  scroll-margin-top: 96px;
}
.article-body h2:first-of-type,
.article-body .key-takeaways + h2 { margin-top: 0; }

.article-body h3 {
  font: 600 20px/1.3 var(--q-font-display);
  margin: 40px 0 12px;
  scroll-margin-top: 96px;
}
.article-body p {
  margin: 0 0 20px;
  max-width: 680px;
}
.article-body ul, .article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
  max-width: 680px;
}
.article-body li { margin-bottom: 8px; }

.article-body blockquote {
  border-left: 3px solid var(--site-accent);
  padding: 4px 0 4px 20px;
  margin: 32px 0;
  font-style: italic;
  color: var(--site-muted);
  max-width: 640px;
}
.article-body strong { color: var(--site-fg); }

/* ─── Key Takeaways Box ─── */
.key-takeaways {
  background: color-mix(in srgb, var(--site-accent) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--site-accent) 18%, transparent);
  border-radius: var(--q-radius-md);
  padding: 24px 28px;
  margin: 0 0 48px;
}
.key-takeaways h2 {
  font: 600 12px/1 var(--q-font-display) !important;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--site-accent);
  margin: 0 0 12px !important;
  padding: 0 !important;
}
.key-takeaways ul { margin: 0; }
.key-takeaways li {
  font-size: 15px;
  line-height: 1.6;
  color: var(--site-muted);
}

/* ─── Stat Highlight ─── */
.stat-highlight {
  font: 700 48px/1 var(--q-font-display);
  color: var(--site-accent);
  display: block;
  margin: 16px 0;
  letter-spacing: -0.02em;
}

/* ─── Article CTA ─── */
.article-cta {
  background: color-mix(in srgb, var(--site-accent) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--site-accent) 15%, transparent);
  border-radius: var(--q-radius-lg);
  padding: 48px;
  text-align: center;
  margin: 64px 0 32px;
}
.article-cta h2 {
  font: 600 28px/1.2 var(--q-font-display) !important;
  margin: 0 0 12px !important;
  padding: 0 !important;
}
.article-cta p {
  margin: 0 auto 24px;
  color: var(--site-muted);
  max-width: 440px;
}

/* ─── Related Articles ─── */
.internal-links {
  margin: 48px 0 0;
  padding: 32px 0 0;
  border-top: 1px solid var(--site-border);
}
.internal-links h3 {
  font: 600 11px/1 var(--q-font-display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--site-muted);
  margin: 0 0 16px;
}
.internal-links a {
  display: inline-block;
  margin: 0 20px 8px 0;
  font: 400 14px/1.5 var(--q-font-body);
  color: var(--site-accent);
  text-decoration: none;
  transition: opacity var(--q-dur-fast) var(--q-ease);
}
.internal-links a:hover { opacity: 0.7; }