.manual-hero {
  position: relative;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.manual-hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 52%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-transparent), var(--color-accent), var(--color-sky), var(--color-transparent));
  content: "";
}

.manual-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(48px, 8vw, 108px);
  align-items: center;
}

.manual-hero-copy {
  max-width: 740px;
}

.manual-hero-copy .lead {
  margin-bottom: 30px;
}

.manual-badges {
  margin-top: 28px;
}

.manual-map {
  position: relative;
  padding: clamp(28px, 4vw, 42px);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  color: var(--color-text);
  box-shadow: var(--shadow-float);
  transform: perspective(1000px) rotateY(-3deg) rotateX(1deg);
}

.manual-map::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 34px;
  width: 1px;
  background: linear-gradient(180deg, var(--color-transparent), var(--color-accent), var(--color-sky), var(--color-transparent));
  content: "";
}

.manual-map-label {
  margin-bottom: 24px;
  color: var(--color-accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.manual-map ol {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.manual-map li {
  position: relative;
  display: flex;
  min-height: 66px;
  padding: 14px 16px;
  align-items: center;
  gap: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.manual-map li span {
  display: grid;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font: 700 11px/1 var(--font-mono);
}

.manual-map li strong {
  font-size: 15px;
}

.manual-intro {
  display: grid;
  margin-bottom: 48px;
  grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.manual-intro h2 {
  margin-bottom: 0;
  font-size: clamp(25px, 3vw, 34px);
}

.manual-intro p {
  margin: 0;
  color: var(--color-muted);
  font-size: 17px;
}

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

.manual-doc {
  grid-template-columns: 258px minmax(0, 1fr);
}

.manual-prose {
  max-width: 860px;
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.manual-prose section {
  padding-bottom: 34px;
  border-bottom: 1px solid var(--color-border);
}

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

.manual-prose section:first-child h2 {
  margin-top: 8px;
}

.manual-prose .chapter-index {
  display: inline-flex;
  margin-top: 42px;
  color: var(--color-accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.manual-prose section:first-child .chapter-index {
  margin-top: 0;
}

.manual-prose h2 {
  margin-top: 8px;
}

.manual-prose p {
  line-height: 1.9;
}

.manual-prose li {
  line-height: 1.8;
}

.flow-line {
  display: grid;
  margin: 30px 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.flow-line span {
  position: relative;
  display: grid;
  min-height: 62px;
  padding: 10px;
  place-items: center;
  border: 1px solid var(--color-accent-line);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 13px;
  font-weight: 750;
  text-align: center;
}

.flow-line span:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -9px;
  color: var(--color-accent);
  content: "›";
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1;
  transform: translateY(-50%);
}

.manual-prose .data-table {
  margin: 28px 0;
}

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

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

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

  .manual-map {
    max-width: 660px;
    transform: none;
  }

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

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

  .manual-prose {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .manual-hero::after {
    left: 20%;
  }

  .manual-map {
    padding: 22px;
  }

  .manual-map::before {
    left: 26px;
  }

  .manual-intro p {
    font-size: 16px;
  }

  .manual-prose {
    padding: 22px;
    border-radius: var(--radius-card);
  }

  .flow-line {
    grid-template-columns: 1fr 1fr;
  }

  .flow-line span:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 400px) {
  .flow-line {
    grid-template-columns: 1fr;
  }

  .flow-line span::after {
    display: none;
  }
}