:root {
  --doc-rule-width: 3px;
  --doc-code-label-size: 11px;
  --doc-meta-size: 12px;
  --doc-lead-size: 19px;
  --doc-chapter-gap: 76px;
  --doc-intro-top: 72px;
  --doc-intro-bottom: 44px;
}

.doc-intro {
  padding-top: var(--doc-intro-top);
  padding-bottom: var(--doc-intro-bottom);
  border-bottom: 1px solid var(--color-border);
}

.doc-intro h1 {
  max-width: 760px;
  font-size: clamp(34px, 4vw, 48px);
}

.doc-lead {
  max-width: 760px;
  margin-bottom: 24px;
  color: var(--color-muted);
  font-size: var(--doc-lead-size);
  line-height: 1.75;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 30px;
}

.doc-meta span {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 5px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-round);
  background: var(--color-panel);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--doc-meta-size);
}

.doc-route {
  margin-bottom: 0;
}

.doc-toc-wrap {
  padding-top: 22px;
  padding-bottom: 16px;
}

.doc-toc {
  top: calc(var(--header-height) + 10px);
}

.doc-article {
  padding-top: 20px;
  padding-bottom: var(--space-section);
}

.doc-chapter {
  padding-top: 28px;
  padding-bottom: var(--doc-chapter-gap);
}

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

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

.doc-chapter h3 {
  position: relative;
  padding-left: 16px;
}

.doc-chapter h3::before {
  position: absolute;
  top: .18em;
  bottom: .18em;
  left: 0;
  width: var(--doc-rule-width);
  border-radius: var(--radius-round);
  background: var(--color-accent);
  content: "";
}

.chapter-index {
  margin-bottom: 10px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: var(--doc-code-label-size);
  font-weight: 700;
  letter-spacing: .14em;
}

.doc-chapter p {
  text-align: justify;
  text-justify: inter-ideograph;
}

.doc-chapter .table-wrap {
  margin-top: 24px;
  margin-bottom: 28px;
}

.doc-chapter .data-table {
  font-size: 14px;
}

.doc-chapter pre {
  margin-top: 24px;
  margin-bottom: 28px;
}

.doc-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin-top: 10px;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.doc-next h2 {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.doc-next p:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  :root {
    --doc-intro-top: 48px;
    --doc-intro-bottom: 34px;
    --doc-lead-size: 17px;
    --doc-chapter-gap: 56px;
  }

  .doc-intro h1 {
    font-size: clamp(26px, 7.5vw, 30px);
  }

  .doc-chapter p {
    text-align: left;
  }

  .doc-next {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .doc-meta {
    align-items: flex-start;
  }

  .doc-toc-wrap {
    padding-top: 16px;
  }

  .doc-article {
    padding-top: 8px;
  }

  .doc-chapter {
    padding-top: 22px;
  }

  .doc-chapter h3 {
    padding-left: 13px;
  }

  .doc-next {
    padding: 22px;
  }
}