.doc-intro {
  position: relative;
  overflow-x: clip;
  padding-top: clamp(72px, 10vw, 132px);
  padding-bottom: clamp(56px, 8vw, 96px);
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(180deg, var(--color-accent-glow) 0, var(--color-transparent) 240px),
    var(--color-canvas);
}

.doc-intro h1 {
  max-width: 880px;
}

.doc-intro .lead a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-deep);
  text-underline-offset: 4px;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.doc-directory {
  padding-top: clamp(64px, 8vw, 104px);
  padding-bottom: clamp(64px, 8vw, 104px);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.doc-directory h2 {
  margin-bottom: 32px;
}

.doc-directory .toc {
  margin-bottom: 32px;
}

.doc-directory .callout {
  max-width: 880px;
  margin-bottom: 0;
}

.doc-body {
  background: var(--color-canvas);
}

.doc-chapter {
  scroll-margin-top: calc(var(--header-height) + 24px);
  padding-top: clamp(76px, 10vw, 136px);
  padding-bottom: clamp(76px, 10vw, 136px);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.doc-chapter .wrap {
  max-width: calc(920px + var(--gutter) * 2);
}

.doc-chapter h2 {
  margin-bottom: 42px;
}

.doc-chapter h3 {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
}

.doc-chapter p {
  line-height: 1.9;
}

.chapter-index {
  margin-bottom: 16px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.doc-chapter .table-scroll,
.doc-chapter .window,
.doc-chapter pre {
  margin-top: 32px;
  margin-bottom: 36px;
}

.doc-chapter .callout {
  margin-top: 40px;
  margin-bottom: 40px;
}

.doc-chapter .doc-download-card {
  max-width: 100%;
}

@media (max-width: 768px) {
  .doc-intro {
    padding-top: 64px;
    padding-bottom: 56px;
  }

  .doc-meta {
    flex-direction: column;
    gap: 8px;
  }

  .doc-directory {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .doc-chapter {
    scroll-margin-top: var(--header-height);
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .doc-chapter h2 {
    margin-bottom: 34px;
  }

  .doc-chapter h3 {
    margin-top: 38px;
  }
}

@media (max-width: 390px) {
  .doc-meta span {
    overflow-wrap: anywhere;
  }
}