.deepdoc-hero {
  display: grid;
  margin-top: clamp(24px, 4vw, 48px);
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  border-radius: var(--radius-banner);
  background: var(--color-ink-panel);
  color: var(--color-on-dark);
  padding-top: clamp(42px, 7vw, 78px);
  padding-bottom: clamp(42px, 7vw, 78px);
  box-shadow: var(--shadow-banner);
}

.deepdoc-hero-copy {
  padding-left: clamp(24px, 5vw, 64px);
}

.deepdoc-hero h1 {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--color-on-dark);
  font-size: clamp(34px, 4vw, 46px);
}

.deepdoc-hero .lede {
  max-width: 720px;
  color: var(--color-on-dark-soft);
}

.deepdoc-hero .button-row {
  margin-top: 28px;
}

.deepdoc-map {
  margin-right: clamp(24px, 5vw, 64px);
  border: 1px solid var(--color-chip-border);
  border-radius: var(--radius-card);
  background: var(--color-ink-lift);
  padding: clamp(22px, 3vw, 30px);
}

.deepdoc-map-label {
  margin-bottom: 18px;
  color: var(--color-on-dark-faint);
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.deepdoc-map ol {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.deepdoc-map li {
  display: grid;
  grid-template-columns: minmax(112px, auto) minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--color-chip-border);
  padding-bottom: 10px;
  color: var(--color-on-dark-soft);
  font-size: .86rem;
}

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

.deepdoc-map code {
  background: transparent;
  color: var(--color-accent);
  padding: 0;
}

.deepdoc-toc-wrap {
  padding-top: 28px;
  padding-bottom: 12px;
}

.deepdoc-article {
  padding-top: clamp(44px, 7vw, 80px);
  padding-bottom: var(--section-space);
}

.deepdoc-intro {
  border-left: 5px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--color-surface);
  padding: clamp(22px, 4vw, 32px);
}

.deepdoc-chapter {
  padding-top: clamp(72px, 9vw, 108px);
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.deepdoc-chapter + .deepdoc-chapter {
  margin-top: clamp(18px, 4vw, 40px);
  border-top: 1px solid var(--color-border);
}

.deepdoc-chapter h2 {
  margin-top: 0;
}

.deepdoc-chapter h3 {
  margin-top: 2em;
}

.deepdoc-chapter p {
  margin-bottom: 1.15em;
}

.deepdoc-chapter pre,
.deepdoc-chapter .table-wrap,
.deepdoc-chapter .callout {
  margin-top: 28px;
  margin-bottom: 32px;
}

.chapter-index {
  margin-bottom: 10px;
  color: var(--color-accent-strong);
  font-size: .76rem;
  font-weight: 750;
  letter-spacing: .12em;
}

@media (max-width: 860px) {
  .deepdoc-hero {
    grid-template-columns: 1fr;
  }

  .deepdoc-hero-copy {
    padding-right: clamp(24px, 5vw, 64px);
  }

  .deepdoc-map {
    margin-right: clamp(24px, 5vw, 64px);
    margin-left: clamp(24px, 5vw, 64px);
  }
}

@media (max-width: 768px) {
  .deepdoc-hero h1 {
    font-size: clamp(24px, 7.5vw, 30px);
  }

  .deepdoc-toc-wrap {
    padding-top: 20px;
  }
}

@media (max-width: 520px) {
  .deepdoc-hero {
    border-radius: var(--radius-card);
  }

  .deepdoc-hero-copy {
    padding-right: 20px;
    padding-left: 20px;
  }

  .deepdoc-map {
    margin-right: 20px;
    margin-left: 20px;
    padding: 20px;
  }

  .deepdoc-map li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .deepdoc-chapter {
    padding-top: 64px;
  }
}