.nodes-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(58px, 8vw, 108px);
  padding-bottom: clamp(72px, 9vw, 124px);
  isolation: isolate;
}

.nodes-hero::before {
  position: absolute;
  z-index: -2;
  top: 8%;
  right: -12%;
  width: min(64vw, 860px);
  aspect-ratio: 1;
  border-radius: var(--radius-circle);
  background: radial-gradient(circle at center, var(--color-ocean-dark), transparent 68%);
  opacity: .72;
  content: "";
  pointer-events: none;
}

.nodes-hero::after {
  position: absolute;
  z-index: -1;
  right: 8%;
  bottom: 8%;
  width: 38%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-line), transparent);
  content: "";
  pointer-events: none;
}

.nodes-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
  align-items: center;
  gap: clamp(34px, 6vw, 84px);
}

.nodes-hero-copy {
  position: relative;
  z-index: 4;
}

.nodes-hero-copy h1 {
  max-width: 760px;
  margin-top: 25px;
}

.nodes-hero-copy .lead strong {
  color: var(--color-text);
  font-weight: 680;
}

.nodes-hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nodes-hero-actions .button {
  min-height: 52px;
  padding-inline: 25px;
}

.route-orbit {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, var(--color-panel-raised), var(--color-panel)),
    var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border), var(--shadow-panel);
}

.route-orbit::before {
  position: absolute;
  inset: 10%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-circle);
  content: "";
}

.route-orbit::after {
  position: absolute;
  inset: 19%;
  border: 1px dashed var(--color-accent-border);
  border-radius: var(--radius-circle);
  content: "";
}

.route-orbit-map {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  min-height: 520px;
}

.orbit-arc,
.orbit-link {
  fill: none;
  stroke-linecap: round;
}

.orbit-arc {
  stroke: var(--color-line);
  stroke-width: 1.2;
}

.orbit-arc-wide {
  opacity: .58;
}

.orbit-arc-dash {
  stroke-dasharray: 5 11;
  opacity: .5;
}

.orbit-link {
  stroke: var(--color-route);
  stroke-width: 1.45;
  stroke-dasharray: 4 8;
}

.orbit-node {
  fill: var(--color-bg);
  stroke: var(--color-accent);
  stroke-width: 2;
}

.orbit-node-main {
  fill: var(--color-accent);
}

.orbit-pulse {
  fill: var(--color-accent-soft);
  stroke: var(--color-accent-border);
  stroke-width: 1;
  transform-origin: 115px 322px;
  animation: node-breathe 3.6s var(--ease-soft) infinite;
}

.orbit-label {
  fill: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
}

.orbit-status {
  position: absolute;
  z-index: 4;
  right: 24px;
  bottom: 22px;
  min-height: 32px;
  padding-inline: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-panel-soft);
  color: var(--color-muted);
  box-shadow: inset 0 0 0 1px var(--color-border);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
}

.orbit-status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: var(--radius-circle);
  background: var(--color-success);
}

.coverage-strip {
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-border), inset 0 -1px 0 var(--color-border);
}

.coverage-strip-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.coverage-stat {
  min-height: 118px;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

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

.coverage-stat strong {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.25;
}

.coverage-stat span {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: .8rem;
}

.nodes-toc-wrap {
  padding-top: 26px;
}

.route-table-note {
  max-width: 920px;
  margin: 22px 0 0;
  color: var(--color-muted);
  font-size: .9rem;
  line-height: 1.85;
}

.route-type-section {
  background: linear-gradient(180deg, transparent, var(--color-panel-soft), transparent);
}

.route-type-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
  gap: 18px;
}

.route-type-main,
.route-type-brief {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.route-type-main {
  min-height: 100%;
  padding: clamp(28px, 5vw, 52px);
}

.route-type-main::after {
  position: absolute;
  right: -72px;
  bottom: -110px;
  width: 260px;
  height: 260px;
  border: 1px dashed var(--color-accent-border);
  border-radius: var(--radius-circle);
  content: "";
  pointer-events: none;
}

.route-type-side {
  display: grid;
  gap: 18px;
}

.route-type-brief {
  padding: clamp(24px, 4vw, 34px);
}

.route-type-index {
  width: fit-content;
  max-width: 100%;
  min-height: 30px;
  margin-bottom: 22px;
  padding-inline: 11px;
  display: inline-flex;
  align-items: center;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent-border);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.route-type-main p,
.route-type-brief p {
  position: relative;
  z-index: 2;
  color: var(--color-muted);
  line-height: 1.9;
}

.route-type-main p:last-child,
.route-type-brief p:last-child {
  margin-bottom: 0;
}

.use-case-browser {
  border-top: 1px solid var(--color-border);
}

.use-case-row {
  padding-top: 32px;
  padding-bottom: 32px;
  display: grid;
  grid-template-columns: minmax(210px, .62fr) minmax(0, 1.38fr);
  gap: clamp(28px, 6vw, 82px);
  border-bottom: 1px solid var(--color-border);
}

.use-case-name {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.use-case-name h3 {
  margin: 0;
}

.use-case-marker {
  width: 9px;
  height: 9px;
  margin-top: 9px;
  flex: 0 0 auto;
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  box-shadow: 0 0 0 7px var(--color-accent-soft);
}

.use-case-copy {
  color: var(--color-muted);
  line-height: 1.9;
}

.use-case-copy p:last-child {
  margin-bottom: 0;
}

.inline-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-border);
  text-underline-offset: .2em;
}

.route-switch-section {
  position: relative;
  overflow: hidden;
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-border), inset 0 -1px 0 var(--color-border);
}

.route-switch-section::after {
  position: absolute;
  top: 12%;
  right: -9%;
  width: 380px;
  height: 380px;
  border: 1px dashed var(--color-accent-border);
  border-radius: var(--radius-circle);
  content: "";
  pointer-events: none;
}

.route-switch-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(280px, .76fr) minmax(0, 1.24fr);
  gap: clamp(46px, 8vw, 112px);
}

.route-switch-intro {
  position: sticky;
  top: calc(var(--toc-top) + var(--toc-height) + 30px);
  align-self: start;
}

.diagnostic-flow {
  display: grid;
}

.diagnostic-step {
  position: relative;
  padding: 26px 26px 28px 52px;
  border-bottom: 1px solid var(--color-border);
}

.diagnostic-step:first-child {
  border-top: 1px solid var(--color-border);
}

.diagnostic-step::before {
  position: absolute;
  top: 32px;
  left: 14px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  box-shadow: 0 0 0 7px var(--color-accent-soft);
  content: "";
}

.diagnostic-step::after {
  position: absolute;
  top: 49px;
  bottom: -1px;
  left: 18px;
  width: 1px;
  background: var(--color-accent-border);
  content: "";
}

.diagnostic-step:last-child::after {
  display: none;
}

.diagnostic-label {
  display: block;
  margin-bottom: 9px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.diagnostic-step p {
  margin-bottom: 0;
  color: var(--color-muted);
  line-height: 1.85;
}

.region-wall {
  padding: clamp(24px, 5vw, 42px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.region-chip {
  max-width: 100%;
  min-height: 42px;
  padding-inline: 15px;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  color: var(--color-text-soft);
  box-shadow: inset 0 0 0 1px var(--color-border);
  font-size: .86rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.region-chip span {
  flex: 0 0 auto;
}

.coverage-notes {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.coverage-notes article {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.coverage-notes h3 {
  font-size: 1.12rem;
}

.coverage-notes p {
  margin-bottom: 0;
  color: var(--color-muted);
  line-height: 1.85;
}

@keyframes node-breathe {
  0%,
  100% {
    opacity: .28;
    transform: scale(.76);
  }

  50% {
    opacity: .72;
    transform: scale(1.12);
  }
}

@media (max-width: 1040px) {
  .nodes-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .route-orbit {
    width: 100%;
    max-width: 720px;
    margin-inline: auto;
  }

  .route-type-layout,
  .route-switch-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .route-switch-intro {
    position: static;
  }

  .coverage-notes {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .nodes-hero {
    padding-top: 42px;
  }

  .route-orbit {
    min-height: 390px;
  }

  .route-orbit-map {
    min-height: 390px;
  }

  .coverage-strip-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .coverage-stat {
    min-height: 94px;
  }

  .coverage-stat + .coverage-stat {
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }

  .use-case-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .route-type-side {
    gap: 14px;
  }

  .region-wall {
    gap: 9px;
  }

  .region-chip {
    flex: 1 1 142px;
  }
}

@media (max-width: 420px) {
  .nodes-hero-actions .button {
    width: 100%;
  }

  .route-orbit {
    min-height: 320px;
  }

  .route-orbit-map {
    min-height: 320px;
  }

  .orbit-status {
    right: 14px;
    bottom: 14px;
  }

  .diagnostic-step {
    padding-right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .orbit-pulse {
    animation: none;
  }
}