.essay-page {
  padding: 120px 32px 80px;
  max-width: 720px;
  margin: 0 auto;
}
.essay-container {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Header */
.essay-header {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.essay-meta {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.essay-page-title {
  font-family: var(--serif);
  font-size: 2.2rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
}
.essay-subtitle {
  font-size: 1.02rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* Author byline */
.essay-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}
.essay-author-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}
.essay-author-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.essay-author-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}
.essay-author-name a {
  color: inherit;
  text-decoration: none;
}
.essay-author-name a:hover { color: var(--accent); }
.essay-author-role {
  font-size: 0.68rem;
  color: var(--text-3);
}

/* Body */
.essay-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.essay-body p {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.85;
}
.essay-body h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text);
  margin-top: 1.2rem;
}
.essay-body strong {
  color: var(--text);
  font-weight: 600;
}
.essay-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(37,99,235,0.2);
  transition: border-color 0.2s;
}
.essay-body a:hover {
  border-color: var(--accent);
}

/* Pullquote */
.essay-pullquote {
  border-left: 3px solid var(--accent);
  padding: 16px 0 16px 24px;
  margin: 1rem 0;
}
.essay-pullquote p {
  font-family: var(--serif);
  font-size: 1.08rem;
  color: var(--text);
  line-height: 1.6;
  font-style: italic;
}

/* Diagrams (pure CSS) */
.essay-diagram {
  background: var(--bg-tint);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 24px 20px;
  margin: 1.5rem 0;
}
.essay-diagram-caption {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  text-align: center;
  margin-top: 14px;
}

/* Flow diagram */
.diagram-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.diagram-node {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.35;
  min-width: 90px;
}
.diagram-node--primary {
  background: var(--accent);
  color: #fff;
}
.diagram-node--secondary {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(37,99,235,0.15);
}
.diagram-node--muted {
  background: #f1f5f9;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.diagram-node--danger {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid rgba(185,28,28,0.15);
}
.diagram-node--success {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid rgba(21,128,61,0.15);
}
.diagram-node--warn {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid rgba(146,64,14,0.15);
}
.diagram-arrow {
  font-size: 1rem;
  color: var(--text-3);
  padding: 0 8px;
  flex-shrink: 0;
}

/* Comparison table */
.diagram-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.diagram-compare-col {
  padding: 16px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.diagram-compare-col--left {
  background: #fef2f2;
  border: 1px solid rgba(185,28,28,0.12);
}
.diagram-compare-col--right {
  background: #f0fdf4;
  border: 1px solid rgba(21,128,61,0.12);
}
.diagram-compare-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.diagram-compare-col--left .diagram-compare-title { color: #b91c1c; }
.diagram-compare-col--right .diagram-compare-title { color: #15803d; }
.diagram-compare-item {
  font-size: 0.72rem;
  color: var(--text-2);
  line-height: 1.5;
  padding-left: 14px;
  position: relative;
}
.diagram-compare-item::before {
  position: absolute;
  left: 0;
  font-size: 0.68rem;
}
.diagram-compare-col--left .diagram-compare-item::before { content: '\2717'; color: #b91c1c; }
.diagram-compare-col--right .diagram-compare-item::before { content: '\2713'; color: #15803d; }

/* Layered stack diagram */
.diagram-stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 400px;
  margin: 0 auto;
}
.diagram-stack-layer {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.35;
}

/* Key insight callout */
.essay-insight {
  background: var(--accent-soft);
  border: 1px solid rgba(37,99,235,0.12);
  border-radius: 10px;
  padding: 18px 22px;
  margin: 1rem 0;
}
.essay-insight-label {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 6px;
}
.essay-insight p {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.65;
}

/* Related paper cards */
.essay-papers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.essay-paper-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-tint);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.2s;
}
.essay-paper-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.essay-paper-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.essay-paper-icon--conf {
  background: var(--accent-soft);
  color: var(--accent);
}
.essay-paper-icon--arxiv {
  background: #fef3c7;
  color: #92400e;
}
.essay-paper-icon--code {
  background: #f0fdf4;
  color: #15803d;
}
.essay-paper-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.essay-paper-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.essay-paper-venue {
  font-size: 0.65rem;
  color: var(--text-3);
}

/* Footer */
.essay-footer {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.essay-related h3 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}
.essay-back {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
.essay-back:hover { text-decoration: underline; }

/* Share / cite bar */
.essay-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.essay-action-btn {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-2);
  text-decoration: none;
  transition: all 0.2s;
}
.essay-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* More essays navigation */
.essay-more h3 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}
.essay-more-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.essay-more-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--bg-tint);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.2s;
}
.essay-more-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.essay-more-title {
  font-family: var(--serif);
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.3;
}
.essay-more-desc {
  font-size: 0.68rem;
  color: var(--text-3);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .essay-page { padding: 100px 20px 60px; }
  .essay-page-title { font-size: 1.6rem; }
  .diagram-flow { gap: 6px; }
  .diagram-compare { grid-template-columns: 1fr; }
  .diagram-node { min-width: 70px; padding: 8px 12px; font-size: 0.65rem; }
  .diagram-arrow { padding: 0 4px; }
  .essay-more-grid { grid-template-columns: 1fr; }
}