.doc-hero {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.doc-hero h1 {
  max-width: 980px;
}

.doc-hero .lead {
  max-width: 790px;
}

.doc-intro {
  margin-top: 30px;
  padding: 20px 24px;
}

.doc-intro p {
  color: var(--color-muted);
}

.doc-intro a {
  color: var(--color-accent-dark);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.doc-toc-section {
  position: relative;
  z-index: 20;
  padding-top: 24px;
  padding-bottom: 18px;
  background: var(--color-page);
}

.doc-body {
  padding-bottom: var(--section-space);
}

.doc-chapter {
  padding-top: clamp(64px, 8vw, 96px);
  padding-bottom: clamp(42px, 6vw, 72px);
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-height) + 72px);
}

.doc-chapter:last-child {
  border-bottom: 0;
}

.chapter-index {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  margin-bottom: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  padding: 3px 10px;
  color: var(--color-accent-dark);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

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

.doc-chapter h3 {
  margin-top: 1.85em;
  padding-top: 4px;
  font-size: clamp(21px, 2.5vw, 27px);
}

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

.doc-chapter .table-wrap {
  margin-top: 28px;
  margin-bottom: 28px;
}

.doc-chapter pre {
  margin-top: 22px;
  margin-bottom: 24px;
}

.doc-chapter .callout {
  margin-top: 28px;
  margin-bottom: 30px;
}

@media (max-width: 640px) {
  .doc-hero {
    padding-top: 44px;
    padding-bottom: 48px;
  }

  .doc-intro {
    padding: 17px;
  }

  .doc-toc-section {
    padding-top: 14px;
    padding-bottom: 10px;
  }

  .doc-chapter {
    padding-top: 54px;
    padding-bottom: 38px;
  }

  .doc-chapter h3 {
    margin-top: 1.6em;
  }
}