.doc-hero {
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(42px, 6vw, 72px);
}

.doc-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  align-items: end;
  gap: clamp(30px, 6vw, 76px);
}

.doc-hero-copy h1 {
  margin-bottom: 20px;
}

.doc-hero-copy .lede {
  max-width: 68ch;
}

.doc-summary {
  display: grid;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  padding: 22px;
  box-shadow: var(--shadow-soft);
}

.doc-summary-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-muted);
  font-size: 14px;
}

.doc-summary-row strong {
  min-width: 74px;
  color: var(--color-text);
}

.doc-toc-section {
  padding-top: 0;
  padding-bottom: clamp(42px, 6vw, 72px);
}

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

.doc-intro p + p {
  margin-top: 14px;
}

.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  align-items: start;
  gap: clamp(34px, 6vw, 72px);
}

.doc-content {
  min-width: 0;
}

.doc-chapter {
  scroll-margin-top: 94px;
  border-top: 1px solid var(--color-border);
  padding-top: clamp(58px, 8vw, 92px);
  padding-bottom: clamp(58px, 8vw, 92px);
}

.doc-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.doc-chapter h2 {
  margin-bottom: 26px;
}

.doc-chapter h3 {
  margin-top: 36px;
  margin-bottom: 14px;
}

.doc-chapter p + p {
  margin-top: 16px;
}

.doc-chapter ul,
.doc-chapter ol {
  margin-top: 18px;
  padding-left: 1.4em;
}

.doc-chapter li + li {
  margin-top: 9px;
}

.doc-chapter .callout,
.doc-chapter .table-wrap,
.doc-chapter pre {
  margin-top: 26px;
  margin-bottom: 26px;
}

.doc-side {
  position: sticky;
  top: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-block);
  background: var(--color-panel);
  padding: 18px;
}

.doc-side h2 {
  margin-bottom: 12px;
  font-size: 15px;
}

.doc-side ul {
  display: grid;
  gap: 5px;
  list-style: none;
}

.doc-side a {
  display: block;
  border-radius: var(--radius-sm);
  padding: 7px 9px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.45;
}

.doc-side a:hover {
  background: var(--color-bg);
  color: var(--color-accent-ink);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.field-note {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-block);
  background: var(--color-panel);
  padding: 18px;
}

.field-note strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.field-note p {
  color: var(--color-muted);
  font-size: 14px;
}

.chapter-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.chapter-links a {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  padding: 7px 13px;
  color: var(--color-accent-ink);
  font-size: 13px;
  font-weight: 700;
}

.doc-endnote {
  margin-top: 30px;
}

@media (max-width: 980px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .doc-side {
    display: none;
  }
}

@media (max-width: 760px) {
  .doc-hero-inner,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .doc-summary {
    padding: 18px;
  }

  .doc-chapter {
    scroll-margin-top: 78px;
  }
}

@media (max-width: 420px) {
  .doc-summary-row {
    display: grid;
    gap: 2px;
  }

  .doc-summary-row strong {
    min-width: 0;
  }
}