/* ============ ARTICLE / PILLAR PAGE ============ */
.article-hero {
  padding: 56px 24px 32px;
}
.article-hero-inner { max-width: 1180px; margin: 0 auto; }
.article-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.article-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.04;
  margin-bottom: 20px;
  max-width: 880px;
}
.article-deck {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 700px;
  margin-bottom: 32px;
  font-weight: 400;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding-bottom: 24px;
  border-bottom: 0.5px solid var(--border);
}
.article-meta .item { display: flex; align-items: center; gap: 6px; }
.article-meta .label { text-transform: uppercase; }
.article-meta .value { color: var(--ink); }
.article-meta .avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 0.5px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0;
}

/* Article body */
.article-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 56px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}
.article-toc {
  position: sticky;
  top: 80px;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.article-toc-title {
  color: var(--text-tertiary);
  margin-bottom: 14px;
  letter-spacing: 0.08em;
}
.article-toc a {
  display: block;
  color: var(--text-secondary);
  padding: 6px 0;
  border-left: 1.5px solid transparent;
  padding-left: 12px;
  margin-left: -12px;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1.4;
}
.article-toc a:hover, .article-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}
.article-toc a .num { color: var(--accent); margin-right: 8px; display: inline-block; min-width: 18px; }

/* Long-form content */
.article-content { max-width: 720px; }
.article-section { margin-bottom: 64px; scroll-margin-top: 80px; }
.article-section:last-child { margin-bottom: 0; }
.article-section h2 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 10px;
  font-weight: 400;
}
.article-section h2 .num { color: var(--accent); }
.article-section h3 {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 18px;
}
.article-section h4 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 28px 0 12px;
  line-height: 1.3;
}
.article-section p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 18px;
}
.article-section p strong { font-weight: 500; }
.article-section a { color: var(--accent); transition: color 0.15s; }
.article-section a:hover { color: #B14B25; }
.article-section ul, .article-section ol {
  margin: 16px 0 18px 22px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}
.article-section li { margin-bottom: 10px; }
.article-section blockquote {
  border-left: 2px solid var(--accent);
  padding: 8px 0 8px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Inline diagram placeholder */
.diagram {
  background: var(--bg-pure);
  border: 0.5px solid var(--border);
  border-radius: 10px;
  padding: 28px 24px;
  margin: 24px 0;
  text-align: center;
}
.diagram-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 18px;
}
.diagram-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.diagram-box {
  background: var(--bg-surface);
  border: 0.5px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 13px;
  font-weight: 500;
  min-width: 120px;
}
.diagram-box.accent {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--accent);
}
.diagram-arrow {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 16px;
}
.diagram-caption {
  font-size: 12px;
  color: var(--text-tertiary);
  font-style: italic;
  margin-top: 12px;
}

/* Related reading */
.related-section {
  background: var(--bg-pure);
  border-top: 0.5px solid var(--border);
  padding: 64px 24px;
}
.related-grid {
  max-width: 1180px;
  margin: 24px auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}
.related-article-card {
  background: var(--bg-pure);
  border: 0.5px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  display: block;
  transition: border-color 0.15s;
}
.related-article-card:hover { border-color: var(--accent); }
.related-art-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.related-art-title {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.3;
  margin-bottom: 8px;
}
.related-art-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}

@media (max-width: 900px) {
  .article-body { grid-template-columns: 1fr; gap: 32px; padding: 32px 24px 48px; }
  .article-toc { position: static; }
}