.deepdoc-hero {
  padding-top: clamp(52px, 7vw, 92px);
}

.deepdoc-heading {
  max-width: var(--reading-width);
}

.deepdoc-heading h1 {
  max-width: 12em;
}

.deepdoc-heading .lead {
  max-width: 42em;
  margin-bottom: 28px;
}

.deepdoc-actions {
  margin-bottom: 24px;
}

.deepdoc-facts {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.handbook-intro {
  margin-top: clamp(36px, 6vw, 64px);
  padding: clamp(24px, 4vw, 38px);
}

.handbook-intro h3 {
  font-size: 1.35rem;
}

.handbook-intro p:last-child {
  margin-bottom: 0;
}

.deepdoc-content {
  padding-top: clamp(48px, 6vw, 76px);
}

.handbook-prose {
  line-height: 1.82;
}

.handbook-chapter {
  position: relative;
  padding-top: 24px;
  scroll-margin-top: calc(var(--header-height) + 84px);
}

.handbook-chapter + .handbook-chapter {
  margin-top: clamp(72px, 10vw, 118px);
  padding-top: clamp(38px, 5vw, 58px);
  border-top: 1px solid var(--color-border);
}

.handbook-chapter h2 {
  margin-top: 0;
  margin-bottom: 30px;
}

.handbook-chapter h3 {
  margin-top: 2.4rem;
  font-size: clamp(21px, 2vw, 27px);
}

.handbook-chapter p {
  margin-bottom: 1.15rem;
}

.chapter-index {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 7px 11px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.handbook-prose pre {
  margin-top: 1.8rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}

.handbook-prose .data-table {
  margin-top: 1.8rem;
  margin-bottom: 2rem;
}

.handbook-prose .callout {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 34px;
  }

  .deepdoc-facts {
    align-items: stretch;
  }

  .deepdoc-facts .capsule {
    flex: 1 1 100%;
  }

  .handbook-intro {
    margin-top: 30px;
  }

  .handbook-chapter {
    scroll-margin-top: calc(var(--header-height) + 76px);
  }

  .handbook-chapter + .handbook-chapter {
    margin-top: 68px;
    padding-top: 36px;
  }

  .handbook-prose pre {
    padding: 16px;
    font-size: 0.78rem;
  }
}