.manual-hero {
  position: relative;
  padding-top: clamp(72px, 9vw, 132px);
  padding-bottom: clamp(58px, 7vw, 94px);
  overflow: hidden;
  border-bottom: var(--line-thin) solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(90deg, var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    var(--color-bg);
  background-size: 32px 32px;
}

.manual-hero::before {
  position: absolute;
  top: 12%;
  right: 5%;
  width: min(42vw, 560px);
  aspect-ratio: 1;
  pointer-events: none;
  border: var(--line-thin) solid var(--color-glass-edge);
  background: var(--color-glass);
  clip-path: polygon(50% 5%, 96% 92%, 4% 92%);
  content: "";
  opacity: 0.34;
  transform: rotate(8deg);
}

.manual-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.65fr);
  gap: clamp(34px, 7vw, 96px);
  align-items: end;
}

.manual-hero-copy {
  min-width: 0;
}

.manual-hero-copy h1 {
  max-width: 900px;
  margin-bottom: 24px;
}

.manual-hero-copy .lead {
  margin-bottom: 28px;
}

.manual-specimen {
  min-width: 0;
  padding: 24px;
  border: var(--line-thin) solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-small);
  background: var(--color-paper-glass);
  box-shadow: var(--shadow-paper);
}

.manual-specimen dl {
  margin: 18px 0 0;
}

.manual-specimen dl div {
  padding: 13px 0;
  border-top: var(--line-thin) solid var(--color-border-soft);
}

.manual-specimen dt {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.07em;
}

.manual-specimen dd {
  margin: 5px 0 0;
  font-size: 14px;
  font-weight: 700;
}

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

.manual-intro a,
.manual-prose a {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 4px;
}

.manual-directory {
  position: relative;
  z-index: 10;
  padding-top: 12px;
  padding-bottom: 36px;
}

.directory-title {
  margin: 8px 0 22px;
  font-size: clamp(25px, 3vw, 34px);
}

.manual-body {
  min-width: 0;
}

.manual-chapter {
  border-top: var(--line-thin) solid var(--color-border-soft);
}

.chapter-heading {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: start;
  margin-bottom: clamp(42px, 6vw, 72px);
}

.chapter-index {
  color: var(--color-border);
  font-family: var(--font-display);
  font-size: clamp(72px, 9vw, 126px);
  font-weight: 200;
  line-height: 0.76;
  letter-spacing: -0.09em;
}

.chapter-heading h2 {
  max-width: 850px;
}

.manual-prose {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.manual-prose h3 {
  margin-top: 2.8rem;
  padding-top: 0.85rem;
  border-top: var(--line-thin) solid var(--color-border-soft);
}

.manual-prose h3:first-child {
  margin-top: 0;
}

.manual-prose p {
  text-align: justify;
  text-justify: inter-ideograph;
}

.manual-prose pre {
  margin-top: 1.6rem;
  margin-bottom: 1.7rem;
}

.manual-prose .table-wrap {
  margin-top: 1.8rem;
  margin-bottom: 2rem;
}

.manual-next {
  border-top: var(--line-thin) solid var(--color-border);
}

.manual-link-list {
  display: grid;
}

.manual-link-list a {
  min-width: 0;
  padding: 17px 0;
  display: grid;
  gap: 4px;
  border-bottom: var(--line-thin) solid var(--color-border-soft);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.manual-link-list a:first-child {
  padding-top: 0;
}

.manual-link-list a:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.manual-link-list a:hover {
  color: var(--color-accent-dark);
  transform: translateX(4px);
}

.manual-link-list strong {
  font-family: var(--font-display);
  font-size: 18px;
}

.manual-link-list a > span:last-child {
  color: var(--color-text-muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .manual-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .manual-specimen {
    max-width: 620px;
  }

  .chapter-heading {
    grid-template-columns: 104px minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .manual-hero {
    padding-top: 60px;
    padding-bottom: 58px;
  }

  .manual-hero::before {
    top: 38%;
    right: -26%;
    width: 78vw;
  }

  .manual-specimen {
    padding: 20px;
  }

  .manual-directory {
    padding-bottom: 20px;
  }

  .chapter-heading {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .chapter-index {
    width: max-content;
    font-size: 72px;
  }

  .manual-prose p {
    text-align: left;
  }

  .manual-prose pre {
    padding: 16px;
    font-size: 12px;
  }
}