.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  padding-top: 76px;
  padding-bottom: 70px;
}

.deepdoc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-accent-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-accent-soft) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, var(--color-text), transparent);
  opacity: 0.3;
}

.deepdoc-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 58px;
}

.deepdoc-hero-copy {
  max-width: 780px;
}

.deepdoc-summary {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.85;
}

.deepdoc-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.deepdoc-map {
  position: relative;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-window);
  transform: rotate(2deg);
}

.deepdoc-map-title {
  margin-bottom: 20px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 720;
  letter-spacing: 0.08em;
}

.deepdoc-map-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.deepdoc-map-list li {
  display: grid;
  gap: 3px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.deepdoc-map-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.deepdoc-map-list span {
  color: var(--color-text-muted);
  font-size: 12px;
}

.deepdoc-map-list strong {
  font-size: 15px;
}

.deepdoc-article {
  position: relative;
}

.article-body {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.article-body .toc-tabs {
  max-width: var(--reading-width);
  margin-inline: auto;
}

.doc-section {
  padding-top: 78px;
  padding-bottom: 34px;
}

.doc-section + .doc-section {
  border-top: 1px solid var(--color-border);
}

.section-kicker {
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-lead {
  margin-bottom: 34px;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.85;
}

.article-body h2 {
  scroll-margin-top: var(--toc-offset);
}

.article-body h3 {
  margin-top: 38px;
  font-size: 24px;
}

.article-body p,
.article-body li {
  line-height: 1.92;
}

.article-body p {
  color: var(--color-text-muted);
}

.article-body a {
  overflow-wrap: anywhere;
}

.article-body .callout {
  margin-top: 30px;
  margin-bottom: 30px;
}

.article-body .callout p {
  color: var(--color-text-muted);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
  margin-bottom: 32px;
}

.compare-grid .card {
  box-shadow: none;
}

.compare-grid h3 {
  margin-top: 0;
  font-size: 20px;
}

.compare-grid p {
  margin-bottom: 0;
  font-size: 14px;
}

.article-body .table-scroll {
  width: min(1040px, calc(100vw - (var(--gutter) * 2)));
  margin: 32px 50%;
  transform: translateX(-50%);
}

.diagnostic-flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
  border-radius: var(--radius-xl);
  background: var(--color-panel-strong);
  padding: 20px;
}

.diagnostic-flow div {
  display: grid;
  gap: 5px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 18px;
}

.diagnostic-flow strong {
  color: var(--color-accent-dark);
}

.diagnostic-flow span {
  color: var(--color-text-muted);
  font-size: 13px;
}

.doc-checklist {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  margin-bottom: 32px;
  padding: 0;
  list-style: none;
}

.doc-checklist li {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 14px 18px 14px 48px;
  color: var(--color-text-muted);
}

.doc-checklist li::before {
  content: "✓";
  position: absolute;
  top: 14px;
  left: 18px;
  display: inline-flex;
  width: 22px;
  height: 22px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--color-success-soft);
  color: var(--color-success);
  font-weight: 800;
  line-height: 1;
}

.related-reading {
  border-top: 1px solid var(--color-border);
  padding-top: 68px;
}

.related-reading > div:first-child {
  margin-bottom: 30px;
}

.related-reading .article-grid {
  width: min(1120px, calc(100vw - (var(--gutter) * 2)));
  margin-left: 50%;
  transform: translateX(-50%);
}

.related-reading .article-card h3 {
  margin-top: 0;
}

@media (max-width: 920px) {
  .deepdoc-hero {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .deepdoc-hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .deepdoc-map {
    transform: none;
  }

  .article-body .table-scroll,
  .related-reading .article-grid {
    width: 100%;
    margin-inline: 0;
    transform: none;
  }
}

@media (max-width: 768px) {
  .deepdoc-summary,
  .section-lead {
    font-size: 16px;
  }

  .doc-section {
    padding-top: 62px;
    padding-bottom: 28px;
  }

  .article-body h3 {
    margin-top: 32px;
    font-size: 22px;
  }

  .compare-grid,
  .diagnostic-flow {
    grid-template-columns: 1fr;
  }

  .related-reading {
    padding-top: 54px;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 40px;
    padding-bottom: 46px;
  }

  .deepdoc-hero-grid {
    gap: 28px;
  }

  .deepdoc-facts {
    align-items: flex-start;
    flex-direction: column;
  }

  .deepdoc-map {
    padding: 22px;
  }

  .article-body .toc-tabs {
    margin-inline: 0;
  }

  .doc-section {
    padding-top: 54px;
  }

  .doc-section h2 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .article-body h3 {
    font-size: 21px;
  }

  .diagnostic-flow {
    padding: 14px;
  }

  .doc-checklist li {
    padding-right: 14px;
  }
}