.doc-hero {
  position: relative;
  min-height: calc(100svh - var(--header-height));
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.doc-hero-pattern {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.07;
  pointer-events: none;
}

.doc-hero-pattern path {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 1;
}

.doc-hero-pattern .doc-route {
  stroke-width: 3;
  filter: drop-shadow(0 0 8px var(--color-accent-a45));
}

.doc-hero-glow {
  position: absolute;
  top: -420px;
  right: -280px;
  width: 980px;
  height: 980px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-accent-a16), var(--color-accent-a08) 42%, transparent 70%);
  pointer-events: none;
}

.doc-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 72px;
  padding-top: 74px;
  padding-bottom: 78px;
}

.doc-hero-copy {
  max-width: 760px;
}

.doc-hero-copy h1 {
  max-width: 750px;
  margin-top: 22px;
  font-size: clamp(48px, 5.2vw, 70px);
}

.doc-hero-lead {
  max-width: 680px;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.85;
}

.doc-hero-lead a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-a45);
  text-underline-offset: 0.22em;
}

.doc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.doc-stage-map {
  position: relative;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel-a96);
  box-shadow: var(--shadow-panel), 0 0 54px var(--color-accent-a12);
}

.doc-stage-map::before {
  position: absolute;
  inset: -1px;
  padding: 1px;
  border-radius: var(--radius-panel);
  background: linear-gradient(145deg, var(--color-accent-a35), transparent 46%);
  content: "";
  pointer-events: none;
  -webkit-mask: linear-gradient(var(--color-text) 0 0) content-box, linear-gradient(var(--color-text) 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(var(--color-text) 0 0) content-box, linear-gradient(var(--color-text) 0 0);
  mask-composite: exclude;
}

.stage-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
}

.stage-map-list {
  position: relative;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.stage-map-list::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 13px;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
  content: "";
}

.stage-map-list li {
  position: relative;
  display: grid;
  min-height: 64px;
  grid-template-columns: 28px minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
}

.stage-map-list li + li {
  margin-top: 14px;
}

.stage-map-list strong,
.stage-map-list small {
  grid-column: 2;
}

.stage-map-list strong {
  line-height: 1.35;
}

.stage-map-list small {
  margin-top: 3px;
  font-size: 12px;
}

.stage-node {
  position: relative;
  z-index: 1;
  display: block;
  width: 27px;
  height: 30px;
  grid-row: 1 / span 2;
  background: var(--color-accent);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 0 16px var(--color-accent-a35);
}

.handbook-article {
  position: relative;
  padding-top: 52px;
  padding-bottom: var(--section-space);
}

.handbook-article .toc-tabs {
  margin-right: auto;
  margin-left: auto;
}

.manual-section {
  position: relative;
  max-width: var(--reading-width);
  margin-inline: auto;
  padding-top: 86px;
  padding-bottom: 86px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.manual-section:first-of-type {
  padding-top: 44px;
}

.manual-section h2 {
  margin-bottom: 32px;
}

.manual-section h3 {
  margin-top: 46px;
  margin-bottom: 18px;
  font-size: clamp(22px, 2.5vw, 29px);
}

.manual-section p {
  margin-bottom: 1.35em;
}

.manual-section a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-a45);
  text-underline-offset: 0.22em;
}

.manual-section .table-scroll {
  margin-top: 34px;
  margin-bottom: 40px;
}

.chapter-label {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  margin-bottom: 16px;
  padding: 5px 13px;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  background: var(--color-accent-a08);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.manual-end-panel {
  display: grid;
  max-width: 980px;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 34px;
  margin: 88px auto 0;
  padding: 40px;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-panel);
  background: var(--color-panel-raised);
  box-shadow: 0 0 52px var(--color-accent-a12);
}

.manual-end-panel h2 {
  margin-bottom: 10px;
  font-size: clamp(28px, 4vw, 42px);
}

.manual-end-panel p:last-child {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.manual-end-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 150px;
}

@media (max-width: 980px) {
  .doc-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 46px;
  }

  .doc-stage-map {
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .doc-hero {
    min-height: auto;
  }

  .doc-hero-inner {
    min-height: auto;
    padding-top: 64px;
    padding-bottom: 70px;
  }

  .doc-hero-copy h1 {
    font-size: clamp(30px, 9.6vw, 40px);
  }

  .doc-hero-lead {
    font-size: 16px;
  }

  .doc-hero-glow {
    top: -520px;
    right: -560px;
  }

  .doc-stage-map {
    padding: 24px;
  }

  .manual-section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .manual-end-panel {
    grid-template-columns: minmax(0, 1fr);
    padding: 30px;
  }

  .manual-end-actions {
    width: 100%;
  }

  .manual-end-actions .btn-primary,
  .manual-end-actions .btn-secondary {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .doc-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .doc-hero-actions .btn-primary,
  .doc-hero-actions .btn-secondary {
    width: 100%;
  }

  .doc-stage-map {
    padding: 20px;
    border-radius: var(--radius-card);
  }

  .stage-map-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .handbook-article {
    padding-top: 34px;
  }

  .manual-section:first-of-type {
    padding-top: 28px;
  }

  .manual-section h3 {
    margin-top: 38px;
  }

  .manual-section .callout {
    padding-right: 20px;
  }

  .manual-end-panel {
    margin-top: 64px;
    padding: 24px;
    border-radius: var(--radius-card);
  }
}