.manual-hero {
  position: relative;
  max-width: 100%;
  overflow-x: clip;
  padding-top: 72px;
  padding-bottom: 76px;
  border-block: 1px solid var(--color-line);
  background:
    linear-gradient(rgba(var(--rgb-ink), .035) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, rgba(var(--rgb-ink), .035) 1px, var(--color-transparent) 1px),
    radial-gradient(ellipse at 72% 4%, rgba(var(--rgb-electric), .17), var(--color-transparent) 48%),
    var(--color-surface-soft);
  background-size: 28px 28px, 28px 28px, auto, auto;
}

.manual-hero::after {
  position: absolute;
  right: max(var(--gutter), calc((100% - var(--container)) / 2));
  bottom: 0;
  width: min(34vw, 360px);
  height: 4px;
  border-radius: var(--radius-round) var(--radius-round) 0 0;
  background: var(--color-electric);
  content: '';
}

.manual-hero-inner {
  position: relative;
}

.manual-hero h1 {
  max-width: 12em;
  margin-top: 18px;
}

.manual-hero-lede {
  max-width: 46em;
  margin: 24px 0 0;
  color: var(--color-ink-soft);
  font-size: 18px;
}

.manual-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.manual-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.manual-facts span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.manual-facts span::before {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-electric);
  content: '';
}

.manual-intro {
  padding-top: 64px;
  padding-bottom: 56px;
}

.manual-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
  gap: 32px;
  align-items: start;
}

.manual-intro h2 {
  margin-top: 14px;
  font-size: clamp(30px, 4vw, 42px);
}

.manual-intro p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
}

.manual-intro .callout {
  margin: 0;
}

.handbook {
  position: relative;
  padding-bottom: var(--section-space);
}

.handbook .toc-tabs {
  margin-bottom: 28px;
}

.manual-chapter {
  position: relative;
  padding-top: 70px;
  padding-bottom: 34px;
  border-top: 1px solid var(--color-line);
}

.manual-chapter:first-of-type {
  border-top: 0;
}

.chapter-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

.chapter-label::before {
  width: 24px;
  height: 3px;
  border-radius: var(--radius-round);
  background: var(--color-electric);
  content: '';
}

.manual-chapter > h2 {
  margin-bottom: 28px;
}

.manual-chapter h3 {
  position: relative;
  padding-left: 18px;
}

.manual-chapter h3::before {
  position: absolute;
  top: .35em;
  bottom: .35em;
  left: 0;
  width: 3px;
  border-radius: var(--radius-round);
  background: var(--color-electric);
  content: '';
}

.manual-chapter p {
  margin-bottom: 18px;
}

.manual-chapter .table-scroll,
.manual-chapter pre {
  margin-top: 28px;
  margin-bottom: 32px;
}

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

.manual-chapter code {
  max-width: 100%;
}

.manual-chapter pre {
  border-color: var(--color-ink);
  box-shadow: var(--shadow-panel);
}

.manual-chapter .data-table td,
.manual-chapter .compare-table td {
  min-width: 138px;
}

.manual-chapter .data-table td:first-child,
.manual-chapter .compare-table td:first-child {
  min-width: 154px;
}

@media (max-width: 900px) {
  .manual-intro-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: 54px;
    padding-bottom: 58px;
  }

  .manual-hero-lede {
    font-size: 16px;
  }

  .manual-chapter {
    padding-top: 56px;
  }
}

@media (max-width: 640px) {
  .manual-hero {
    max-width: 100%;
    overflow-x: clip;
    padding-top: 42px;
    padding-bottom: 48px;
    background-size: 22px 22px, 22px 22px, auto, auto;
  }

  .manual-hero::after {
    right: var(--gutter);
    width: 42%;
  }

  .manual-actions {
    width: 100%;
  }

  .manual-actions .btn {
    flex: 1 1 140px;
  }

  .manual-facts {
    align-items: flex-start;
    flex-direction: column;
  }

  .manual-intro {
    padding-top: 48px;
    padding-bottom: 44px;
  }

  .handbook .toc-tabs {
    margin-inline: 0;
  }

  .manual-chapter {
    padding-top: 48px;
    padding-bottom: 24px;
  }

  .manual-chapter h3 {
    padding-left: 14px;
  }

  .manual-chapter pre {
    padding: 16px;
  }
}