.manual-hero {
  position: relative;
  padding-top: calc(var(--section-space) * .82);
  padding-bottom: calc(var(--section-space) * .62);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
}

.manual-hero::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(color-mix(in srgb, var(--color-text-muted) 12%, transparent) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(to bottom, var(--color-shadow-heavy), transparent);
  pointer-events: none;
  content: "";
}

.manual-hero::after {
  position: absolute;
  z-index: 0;
  top: -180px;
  right: -160px;
  width: 620px;
  height: 520px;
  background: radial-gradient(closest-side, var(--color-accent-12), transparent 72%);
  pointer-events: none;
  content: "";
}

.manual-hero .reading-wrap {
  position: relative;
  z-index: 1;
}

.manual-hero h1 {
  max-width: 760px;
}

.manual-lead {
  max-width: 720px;
  margin-bottom: 22px;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.8;
}

.manual-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.manual-entry {
  margin-top: 30px;
  margin-bottom: 0;
}

.manual-entry a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.manual-article {
  padding-top: calc(var(--section-space) * .72);
  padding-bottom: var(--section-space);
}

.manual-article .toc-tabs {
  top: 10px;
}

.manual-chapter {
  position: relative;
  padding-top: 18px;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--color-border);
}

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

.manual-chapter h2 {
  margin-top: 24px;
}

.chapter-code {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 3px 9px;
  color: var(--color-accent);
  background: var(--color-accent-08);
  border: 1px solid var(--color-accent-30);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
}

.manual-chapter p {
  line-height: 1.85;
}

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

.manual-chapter pre {
  margin-top: 26px;
  margin-bottom: 24px;
}

.quality-grid,
.account-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
  margin-bottom: 32px;
}

.quality-grid .card,
.account-flow .card {
  box-shadow: var(--shadow-chip);
}

.quality-grid h3,
.account-flow h3 {
  margin-top: 16px;
  font-size: 20px;
}

.quality-grid p,
.account-flow p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: calc(var(--section-space) * .62);
  }

  .manual-lead {
    font-size: 16px;
  }

  .manual-article {
    padding-top: calc(var(--section-space) * .55);
  }

  .manual-article .toc-tabs {
    top: 6px;
  }

  .quality-grid,
  .account-flow {
    grid-template-columns: 1fr;
  }

  .manual-chapter {
    padding-bottom: 32px;
  }
}

@media (max-width: 640px) {
  .manual-hero::after {
    top: -130px;
    right: -260px;
  }

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

  .manual-entry {
    padding-right: 18px;
  }
}