:root {
  --nodes-hero-min: 620px;
  --nodes-hero-padding-top: 72px;
  --nodes-hero-padding-bottom: 88px;
  --nodes-hero-gap: 72px;
  --nodes-copy-width: 670px;
  --nodes-lead-size: 18px;
  --nodes-panel-padding: 36px;
  --nodes-panel-min: 410px;
  --nodes-panel-shadow: 0 28px 64px var(--accent-shadow);
  --nodes-action-gap: 24px;
  --nodes-fact-gap: 10px;
  --nodes-block-gap: 28px;
  --nodes-region-gap: 64px;
  --nodes-card-padding: 30px;
  --nodes-card-gap: 28px;
  --nodes-icon-size: 66px;
  --nodes-icon-line: 1.8;
  --nodes-wall-gap: 10px;
  --nodes-wall-padding: 24px;
  --nodes-sketch-height: 230px;
  --nodes-route-stroke: 2;
  --nodes-route-soft-opacity: .34;
  --nodes-dot-opacity: .12;
  --nodes-grid-size: 20px;
  --nodes-grid-dot: 3px;
  --nodes-tag-padding-y: 5px;
  --nodes-tag-padding-x: 10px;
  --nodes-method-label-width: 82px;
  --nodes-mobile-space: 48px;
}

.nodes-hero {
  position: relative;
  min-height: var(--nodes-hero-min);
  max-width: 100%;
  overflow-x: clip;
  padding-top: var(--nodes-hero-padding-top);
  padding-bottom: var(--nodes-hero-padding-bottom);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(48% 58% at 82% 44%, var(--ice-spot), var(--color-transparent) 74%),
    linear-gradient(180deg, var(--atmosphere-top), var(--atmosphere-bottom));
}

.nodes-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  gap: var(--nodes-hero-gap);
  align-items: center;
}

.nodes-hero-copy {
  max-width: var(--nodes-copy-width);
}

.nodes-hero-copy h1 {
  margin-top: 18px;
  margin-bottom: 0;
}

.nodes-hero-lead {
  max-width: var(--nodes-copy-width);
  margin-top: 24px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: var(--nodes-lead-size);
}

.nodes-hero-actions {
  display: flex;
  margin-top: 30px;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--nodes-action-gap);
}

.nodes-facts {
  display: flex;
  margin-top: 30px;
  flex-wrap: wrap;
  gap: var(--nodes-fact-gap);
}

.nodes-overview {
  position: relative;
  min-height: var(--nodes-panel-min);
  overflow: hidden;
  padding: var(--nodes-panel-padding);
  box-shadow: inset 0 0 0 1px var(--glass-edge), var(--nodes-panel-shadow);
}

.nodes-overview-head {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.nodes-overview-head .eyebrow-mono {
  margin-bottom: 0;
}

.nodes-overview-head strong {
  font-family: var(--font-display);
  font-size: 18px;
}

.region-badges {
  position: relative;
  z-index: 2;
  display: flex;
  margin-top: 24px;
  flex-wrap: wrap;
  gap: 9px;
}

.region-badges a {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 7px 14px;
  background: var(--color-panel);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 650;
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.region-badges a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.route-sketch {
  position: relative;
  z-index: 1;
  height: var(--nodes-sketch-height);
  margin-top: 8px;
}

.route-sketch svg {
  width: 100%;
  height: 100%;
}

.route-sketch-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-linecap: round;
  stroke-width: var(--nodes-route-stroke);
}

.route-sketch-line-soft {
  stroke: var(--color-ice);
  opacity: var(--nodes-route-soft-opacity);
}

.route-sketch-node {
  fill: var(--color-panel);
  stroke: var(--color-accent);
  stroke-width: var(--nodes-route-stroke);
}

.route-sketch-node-ice {
  stroke: var(--color-ice);
}

.nodes-overview p {
  position: relative;
  z-index: 2;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 13px;
}

.nodes-dotgrid {
  position: absolute;
  right: -24px;
  bottom: -28px;
  width: 210px;
  height: 150px;
  background-image: radial-gradient(circle, var(--color-accent) 0 var(--nodes-grid-dot), var(--color-transparent) calc(var(--nodes-grid-dot) + 1px));
  background-size: var(--nodes-grid-size) var(--nodes-grid-size);
  opacity: var(--nodes-dot-opacity);
  pointer-events: none;
}

.nodes-document {
  position: relative;
}

.nodes-document > .toc-tabs {
  top: 0;
}

.nodes-section {
  overflow-x: visible;
}

.route-region + .route-region {
  margin-top: var(--nodes-region-gap);
}

.route-region-head {
  display: grid;
  grid-template-columns: minmax(180px, .45fr) minmax(0, 1fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 18px;
}

.route-region-head h3 {
  margin-bottom: 0;
}

.route-region-head p {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.route-region-code {
  display: block;
  margin-bottom: 6px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .08em;
}

.route-kind {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--nodes-tag-padding-y) var(--nodes-tag-padding-x);
  background: var(--color-panel-soft);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.2;
  white-space: nowrap;
}

.route-kind-primary {
  border-color: var(--accent-line);
  background: var(--accent-tint-soft);
  color: var(--color-accent-dark);
}

.route-kind-direct {
  background: var(--color-panel);
  color: var(--color-muted);
}

.line-type-layout {
  display: grid;
  gap: var(--nodes-block-gap);
}

.line-type-card {
  display: grid;
  grid-template-columns: var(--nodes-icon-size) minmax(0, 1fr);
  gap: var(--nodes-card-gap);
  border-top: 1px solid var(--color-border);
  padding-top: var(--nodes-card-padding);
}

.line-type-card:first-child {
  border-top: 0;
  padding-top: 0;
}

.line-type-featured {
  position: relative;
}

.line-type-icon {
  display: grid;
  width: var(--nodes-icon-size);
  height: var(--nodes-icon-size);
  place-items: center;
  border: 1px solid var(--glass-edge);
  border-radius: var(--radius-medium);
  background: var(--accent-tint);
  color: var(--color-accent);
  box-shadow: 10px 10px 0 var(--accent-tint-soft);
}

.line-type-icon svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: var(--nodes-icon-line);
}

.line-type-card h3 {
  margin-bottom: 12px;
}

.line-type-card p {
  color: var(--color-muted);
}

.line-type-card p:last-child {
  margin-bottom: 0;
}

.route-comparison {
  margin-top: 54px;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.use-case-item {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 26px;
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--glass-edge), 0 16px 36px var(--accent-shadow);
}

.use-case-mark {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border-radius: var(--radius-medium);
  background: var(--accent-tint-soft);
  color: var(--color-accent);
}

.use-case-mark svg {
  width: 27px;
  height: 27px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: var(--nodes-icon-line);
}

.use-case-item h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.use-case-item p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.method-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 48px;
  align-items: start;
}

.method-steps {
  display: grid;
}

.method-steps article {
  display: grid;
  grid-template-columns: var(--nodes-method-label-width) minmax(0, 1fr);
  column-gap: 22px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  padding-bottom: 24px;
}

.method-steps article:first-child {
  border-top: 0;
  padding-top: 0;
}

.method-label {
  grid-row: span 2;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .05em;
}

.method-steps h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.method-steps p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.method-note {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  padding: 28px;
}

.method-note h3 {
  margin-bottom: 18px;
}

.method-note ul {
  display: grid;
  gap: 12px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
}

.method-note li {
  position: relative;
  padding-left: 20px;
}

.method-note li::before {
  position: absolute;
  top: .68em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.coverage-copy {
  border-top: 2px solid var(--color-accent);
  padding-top: 24px;
}

.coverage-copy h3 {
  font-size: 23px;
}

.coverage-copy p {
  color: var(--color-muted);
}

.region-wall {
  position: relative;
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--nodes-wall-gap);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: var(--nodes-wall-padding);
  background: var(--color-panel);
  box-shadow: inset 0 0 0 1px var(--glass-edge), 0 18px 42px var(--accent-shadow);
}

.region-wall::after {
  position: absolute;
  right: -20px;
  bottom: -24px;
  width: 180px;
  height: 110px;
  background-image: radial-gradient(circle, var(--color-accent) 0 var(--nodes-grid-dot), var(--color-transparent) calc(var(--nodes-grid-dot) + 1px));
  background-size: var(--nodes-grid-size) var(--nodes-grid-size);
  content: "";
  opacity: var(--nodes-dot-opacity);
  pointer-events: none;
}

.region-wall span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 7px 14px;
  background: var(--color-panel-soft);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 650;
}

@media (max-width: 1000px) {
  .nodes-hero-grid {
    grid-template-columns: 1fr;
  }

  .nodes-hero-copy {
    max-width: none;
  }

  .nodes-overview {
    min-height: 0;
  }

  .method-layout {
    grid-template-columns: 1fr;
  }

  .method-note {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --nodes-hero-padding-top: 48px;
    --nodes-hero-padding-bottom: 64px;
    --nodes-hero-gap: 48px;
    --nodes-panel-padding: 26px;
    --nodes-region-gap: 48px;
  }

  .nodes-hero {
    min-height: 0;
  }

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

  .route-region-head {
    grid-template-columns: 1fr;
    gap: 12px;
    align-items: start;
  }

  .use-case-grid,
  .coverage-grid {
    grid-template-columns: 1fr;
  }

  .region-wall {
    grid-column: auto;
  }

  .nodes-document > .toc-tabs {
    top: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --nodes-sketch-height: 180px;
    --nodes-card-gap: 18px;
    --nodes-card-padding: 24px;
  }

  .nodes-hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 8px;
  }

  .nodes-hero-actions .btn-primary,
  .nodes-hero-actions .btn-quiet {
    width: 100%;
  }

  .nodes-overview-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

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

  .use-case-item {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .method-steps article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .method-label {
    grid-row: auto;
  }

  .region-wall {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .region-badges a {
    transition: none;
  }
}