.manual-hero {
  position: relative;
  overflow-x: clip;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.manual-hero::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, var(--color-accent-05), var(--color-transparent)),
    linear-gradient(180deg, var(--color-transparent), var(--color-ink-06));
  content: "";
  pointer-events: none;
}

.manual-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, .7fr);
  gap: 72px;
  align-items: end;
  padding-top: 88px;
  padding-bottom: 76px;
}

.manual-title h1 {
  max-width: 900px;
  margin: 22px 0 24px;
}

.manual-summary {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 21px;
  line-height: 1.7;
}

.manual-title .btn-row {
  margin-top: 30px;
}

.manual-scope {
  padding: 26px;
  background: var(--color-panel-muted);
  box-shadow: inset 0 0 0 1px var(--color-white-18);
}

.manual-label,
.chapter-index {
  margin-bottom: 18px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.manual-scope dl {
  margin: 0;
}

.manual-scope dl div {
  display: grid;
  grid-template-columns: minmax(72px, .6fr) minmax(0, 1.4fr);
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.manual-scope dl div:last-child {
  border-bottom: 1px solid var(--color-border);
}

.manual-scope dt {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.manual-scope dd {
  margin: 0;
  font-weight: 700;
}

.manual-intro {
  background: var(--color-panel);
}

.manual-intro p {
  margin-bottom: 16px;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.85;
}

.manual-intro p:last-child {
  margin-bottom: 0;
}

.manual-intro a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: .18em;
}

.manual-article {
  padding-top: 48px;
  padding-bottom: var(--section-space);
}

.manual-layout {
  display: grid;
  grid-template-columns: minmax(180px, .42fr) minmax(0, 1.58fr);
  gap: 72px;
  align-items: start;
}

.manual-margin {
  position: sticky;
  top: var(--toc-offset);
  padding: 22px;
  border-top: 3px solid var(--color-accent);
  background: var(--color-panel-muted);
}

.manual-margin p:last-child {
  margin-bottom: 0;
  color: var(--color-muted);
  font-family: var(--font-serif);
}

.manual-prose {
  width: 100%;
  max-width: 900px;
  min-width: 0;
}

.manual-chapter {
  padding-bottom: 92px;
  border-bottom: 1px solid var(--color-border);
}

.manual-chapter + .manual-chapter {
  padding-top: 92px;
}

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

.manual-chapter h2 {
  margin-top: 0;
  margin-bottom: 38px;
}

.manual-chapter h3 {
  padding-top: 6px;
  border-top: 1px solid var(--color-border);
}

.manual-chapter p,
.manual-chapter li {
  font-size: 17px;
  line-height: 1.88;
}

.manual-chapter .callout p {
  margin-bottom: 0;
  font-family: var(--font-serif);
  font-size: 17px;
}

.manual-chapter .table-scroll {
  margin: 34px 0 42px;
  border-top: 1px solid var(--color-border);
}

.manual-chapter pre {
  margin: 28px 0;
}

.manual-chapter pre code {
  font-size: 13px;
  line-height: 1.7;
}

.manual-chapter a:not(.btn) {
  font-weight: 650;
}

@media (max-width: 1024px) {
  .manual-hero-grid {
    gap: 40px;
  }

  .manual-layout {
    grid-template-columns: minmax(150px, .35fr) minmax(0, 1.65fr);
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .manual-hero-grid {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .manual-summary {
    font-size: 18px;
  }

  .manual-layout {
    grid-template-columns: 1fr;
  }

  .manual-margin {
    position: static;
  }

  .manual-chapter {
    padding-bottom: 68px;
  }

  .manual-chapter + .manual-chapter {
    padding-top: 68px;
  }

  .manual-chapter p,
  .manual-chapter li {
    font-size: 16px;
  }
}

@media (max-width: 640px) {
  .manual-hero-grid {
    padding-top: 40px;
    padding-bottom: 44px;
  }

  .manual-title .btn-row .btn {
    width: 100%;
  }

  .manual-scope {
    padding: 20px;
  }

  .manual-scope dl div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .manual-article {
    padding-top: 28px;
  }

  .manual-chapter h2 {
    margin-bottom: 30px;
  }
}