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

.manual-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -180px 0 auto;
  width: min(100%, 1100px);
  height: 540px;
  margin-inline: auto;
  background: radial-gradient(
    ellipse at center,
    var(--color-cyan-wash),
    var(--color-brand-wash),
    transparent
  );
  pointer-events: none;
}

.manual-hero-inner {
  padding-top: clamp(70px, 10vw, 126px);
  padding-bottom: clamp(56px, 8vw, 96px);
  text-align: center;
}

.manual-hero h1 {
  max-width: 920px;
  margin: 18px auto 20px;
}

.manual-hero .lead {
  max-width: 780px;
  margin-inline: auto;
}

.manual-hero .button-row {
  justify-content: center;
  margin-top: 28px;
}

.manual-trust {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
}

.manual-fact-band {
  margin-top: -1px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.manual-fact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.manual-fact {
  min-width: 0;
  padding: 24px 20px;
  text-align: center;
}

.manual-fact + .manual-fact {
  border-left: 1px solid var(--color-border);
}

.manual-fact strong {
  display: block;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 850;
  line-height: 1.2;
}

.manual-fact span {
  display: block;
  margin-top: 6px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.manual-intro {
  max-width: 900px;
  margin-inline: auto;
}

.manual-intro-card {
  padding: clamp(24px, 5vw, 42px);
}

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

.manual-layout {
  position: relative;
}

.manual-layout .toc-tabs {
  margin-bottom: 42px;
}

.manual-prose {
  width: min(100%, 920px);
  margin-inline: auto;
}

.manual-chapter {
  padding-top: clamp(54px, 7vw, 88px);
  padding-bottom: clamp(54px, 7vw, 88px);
  border-bottom: 1px solid var(--color-border);
}

.manual-chapter:first-of-type {
  padding-top: 20px;
}

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

.chapter-heading {
  margin-bottom: 34px;
  display: grid;
  grid-template-columns: minmax(110px, 0.28fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.chapter-label {
  padding-top: 8px;
  color: var(--color-brand-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.chapter-heading h2 {
  margin-bottom: 12px;
}

.chapter-heading p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 18px;
}

.manual-prose h3 {
  margin-top: 42px;
}

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

.manual-prose p,
.manual-prose li {
  line-height: 1.82;
}

.manual-prose ul,
.manual-prose ol {
  margin-top: 18px;
  margin-bottom: 26px;
}

.manual-prose li + li {
  margin-top: 10px;
}

.decision-panel {
  margin: 30px 0;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.decision-panel-head {
  padding: 15px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-soft);
}

.decision-panel-head strong {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.decision-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.decision-tabs span {
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-muted);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 10px;
}

.decision-tabs span:first-child {
  border-color: var(--color-brand);
  color: var(--color-brand-dark);
  background: var(--color-brand-wash);
}

.decision-panel-body {
  padding: clamp(20px, 4vw, 32px);
}

.decision-panel-body p:last-child {
  margin-bottom: 0;
}

.criteria-grid {
  margin: 28px 0;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 14px;
}

.criteria-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.criteria-card:nth-child(even) {
  background: var(--color-panel-soft);
}

.criteria-card strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 18px;
}

.criteria-card p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.check-sheet {
  margin: 28px 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-cyan);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.check-sheet h3 {
  margin-top: 0;
}

.check-sheet ul {
  margin-bottom: 0;
  padding-left: 1.2em;
}

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

.manual-prose code {
  font-size: 13px;
}

.manual-links {
  margin-top: 34px;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid var(--color-border);
}

.manual-links a {
  min-height: 42px;
  padding: 8px 13px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-action);
  background: var(--color-panel);
  font-size: 14px;
  font-weight: 720;
}

.manual-links a:hover {
  border-color: var(--color-action);
  background: var(--color-action-wash);
}

@media (max-width: 900px) {
  .manual-fact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .manual-fact:nth-child(odd) {
    border-left: 0;
  }

  .manual-fact:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }

  .chapter-heading {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .chapter-label {
    padding-top: 0;
  }
}

@media (max-width: 640px) {
  .manual-hero-inner {
    padding-top: 56px;
    padding-bottom: 54px;
  }

  .manual-fact {
    padding: 19px 12px;
  }

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

  .criteria-grid {
    grid-template-columns: 1fr;
  }

  .decision-panel-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .manual-chapter {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .manual-links {
    display: grid;
  }

  .manual-links a {
    width: 100%;
  }
}