.nodes-hero {
  border-bottom: var(--border-hairline) solid var(--color-border);
  position: relative;
  overflow-x: clip;
  background: var(--color-panel-glass);
}

.nodes-hero::before {
  content: "";
  width: 48%;
  height: 100%;
  border-left: var(--border-hairline) dashed var(--color-border);
  position: absolute;
  top: 0;
  right: 0;
  background:
    linear-gradient(var(--color-grid) var(--border-hairline), var(--color-transparent) var(--border-hairline)),
    linear-gradient(90deg, var(--color-grid) var(--border-hairline), var(--color-transparent) var(--border-hairline));
  background-size: 32px 32px;
  pointer-events: none;
}

.nodes-hero-grid {
  min-height: 650px;
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(480px, 1.16fr);
  align-items: center;
  gap: clamp(32px, 6vw, 86px);
  position: relative;
  z-index: 1;
}

.nodes-hero-copy {
  padding-top: 56px;
  padding-bottom: 56px;
}

.nodes-hero-copy .eyebrow {
  margin-bottom: 18px;
}

.nodes-hero-copy h1 {
  max-width: 620px;
}

.nodes-hero-copy .lead {
  max-width: 660px;
}

.nodes-hero-copy .button-row {
  margin-top: 28px;
}

.nodes-trust {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.route-atlas {
  min-height: 470px;
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  color: var(--color-text);
  background: var(--color-bg);
}

.route-atlas::after {
  content: "";
  width: 148px;
  height: 148px;
  border: var(--border-hairline) dashed var(--color-accent);
  border-radius: var(--radius-pill);
  position: absolute;
  right: -62px;
  bottom: -62px;
  background: var(--color-accent-soft);
}

.atlas-caption,
.atlas-key {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.atlas-caption {
  top: 18px;
  right: 20px;
  left: 20px;
  justify-content: space-between;
}

.route-atlas > svg {
  width: 100%;
  height: 430px;
  margin-top: 24px;
}

.atlas-grid-line,
.atlas-boundary,
.atlas-route {
  fill: none;
  vector-effect: non-scaling-stroke;
}

.atlas-grid-line {
  stroke: var(--color-border);
  stroke-width: 1;
  stroke-dasharray: 4 9;
}

.atlas-boundary {
  stroke: var(--color-border);
  stroke-width: 1;
  stroke-dasharray: 7 8;
}

.atlas-route {
  stroke-linecap: round;
}

.atlas-route-main {
  stroke: var(--color-accent);
  stroke-width: 3;
}

.atlas-route-return {
  stroke: var(--color-accent-dark);
  stroke-width: 2;
  stroke-dasharray: 9 8;
}

.atlas-route-branch {
  stroke: var(--color-text);
  stroke-width: 1.3;
  stroke-dasharray: 4 6;
}

.atlas-ring {
  fill: var(--color-bg);
  stroke: var(--color-text);
  stroke-width: 2;
}

.atlas-ring-central {
  stroke: var(--color-accent-dark);
}

.atlas-core {
  fill: var(--color-accent);
}

.atlas-label {
  fill: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.atlas-label-strong {
  fill: var(--color-text);
  font-weight: 800;
}

.atlas-key {
  right: 24px;
  bottom: 18px;
  left: 24px;
  gap: 20px;
}

.atlas-key span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.atlas-key-line {
  width: 28px;
  border-top: 2px solid var(--color-accent);
}

.atlas-key-line-dashed {
  border-top-color: var(--color-accent-dark);
  border-top-style: dashed;
}

.directory-summary {
  margin-bottom: 22px;
  border-top: var(--border-hairline) solid var(--color-border);
  border-bottom: var(--border-hairline) solid var(--color-border);
  display: grid;
  grid-template-columns: 0.7fr 0.7fr 1.6fr;
  background: var(--color-panel-glass);
}

.directory-summary > div {
  min-width: 0;
  padding: 18px 20px;
}

.directory-summary > div + div {
  border-left: var(--border-hairline) dashed var(--color-border);
}

.directory-summary-label {
  margin-bottom: 5px;
  display: block;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.directory-summary strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: 17px;
}

.route-structure-section {
  border-top: var(--border-hairline) solid var(--color-border);
  border-bottom: var(--border-hairline) solid var(--color-border);
  background: var(--color-panel);
}

.route-type-stack {
  border-left: var(--border-hairline) dashed var(--color-border);
  display: grid;
  gap: 24px;
}

.route-type-card {
  margin-left: 26px;
  padding: clamp(24px, 4vw, 42px);
  border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 280px;
  align-items: center;
  gap: 30px;
  position: relative;
  background: var(--color-bg);
}

.route-type-card::after {
  content: "";
  width: 27px;
  border-top: var(--border-hairline) solid var(--color-border);
  position: absolute;
  top: 50%;
  left: -27px;
}

.route-type-index {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  writing-mode: vertical-rl;
}

.route-type-copy p:last-child {
  margin-bottom: 0;
}

.route-type-diagram {
  width: 100%;
  color: var(--color-text);
}

.route-type-diagram circle {
  fill: var(--color-bg);
  stroke: var(--color-accent-dark);
  stroke-width: 2;
}

.route-type-diagram path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.selection-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  align-items: start;
  gap: clamp(28px, 5vw, 72px);
}

.selection-rule {
  position: sticky;
  top: var(--toc-top);
}

.decision-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: decision;
}

.decision-list li {
  padding: 0 0 22px 42px;
  border-left: var(--border-hairline) dashed var(--color-border);
  position: relative;
  counter-increment: decision;
}

.decision-list li:last-child {
  padding-bottom: 0;
  border-left-color: var(--color-transparent);
}

.decision-list li::before {
  content: counter(decision);
  width: 26px;
  height: 26px;
  border: var(--border-hairline) solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  position: absolute;
  top: 0;
  left: -14px;
  display: grid;
  place-items: center;
  color: var(--color-text);
  background: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
}

.decision-list strong {
  display: block;
  margin-bottom: 5px;
}

.decision-list p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.usage-list {
  border-top: var(--border-hairline) solid var(--color-border);
}

.usage-item {
  padding: 28px 0;
  border-bottom: var(--border-hairline) solid var(--color-border);
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 20px;
}

.usage-item h3 {
  font-size: 23px;
}

.usage-item p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.usage-marker {
  width: 48px;
  height: 48px;
  border: var(--border-hairline) solid var(--color-accent-dark);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.usage-marker svg {
  width: 23px;
  height: 23px;
}

.route-diagnostics {
  border-top: var(--border-hairline) solid var(--color-border);
  background: var(--color-panel);
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--border-hairline) solid var(--color-border);
  border-left: var(--border-hairline) solid var(--color-border);
}

.diagnostic-note {
  min-width: 0;
  padding: clamp(22px, 3vw, 34px);
  border-right: var(--border-hairline) solid var(--color-border);
  border-bottom: var(--border-hairline) solid var(--color-border);
  background: var(--color-bg);
}

.diagnostic-note h3 {
  font-size: 23px;
}

.diagnostic-note p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.diagnostic-label {
  margin-bottom: 14px;
  display: block;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.coverage-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(30px, 6vw, 88px);
}

.coverage-panel h2 {
  margin-bottom: 0;
}

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

.coverage-copy .button-row {
  margin-top: 28px;
}

@media (max-width: 1080px) {
  .nodes-hero::before {
    width: 100%;
    height: 48%;
    top: auto;
    bottom: 0;
    border-top: var(--border-hairline) dashed var(--color-border);
    border-left: 0;
  }

  .nodes-hero-grid {
    grid-template-columns: 1fr;
    padding-top: 36px;
    padding-bottom: 54px;
  }

  .nodes-hero-copy {
    padding-top: 24px;
    padding-bottom: 0;
  }

  .route-atlas {
    width: 100%;
    max-width: 820px;
    margin-inline: auto;
  }

  .route-type-card {
    grid-template-columns: 62px minmax(0, 1fr);
  }

  .route-type-diagram {
    grid-column: 2;
    max-width: 360px;
  }
}

@media (max-width: 820px) {
  .directory-summary {
    grid-template-columns: 1fr;
  }

  .directory-summary > div + div {
    border-top: var(--border-hairline) dashed var(--color-border);
    border-left: 0;
  }

  .selection-layout,
  .coverage-panel {
    grid-template-columns: 1fr;
  }

  .selection-rule {
    position: static;
  }
}

@media (max-width: 640px) {
  .nodes-hero-grid {
    min-height: 0;
    gap: 28px;
  }

  .nodes-hero-copy {
    padding-top: 12px;
  }

  .nodes-hero-copy h1 {
    max-width: 100%;
  }

  .nodes-trust {
    align-items: flex-start;
  }

  .route-atlas {
    min-height: 330px;
    border-radius: var(--radius-md);
  }

  .route-atlas > svg {
    height: 310px;
    margin-top: 14px;
  }

  .atlas-caption {
    display: none;
  }

  .atlas-label {
    font-size: 15px;
  }

  .atlas-key {
    right: 14px;
    bottom: 12px;
    left: 14px;
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .route-type-stack {
    margin-left: 7px;
  }

  .route-type-card {
    margin-left: 18px;
    padding: 24px 20px;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .route-type-card::after {
    width: 19px;
    left: -19px;
  }

  .route-type-index {
    writing-mode: horizontal-tb;
  }

  .route-type-diagram {
    grid-column: auto;
    max-width: 100%;
  }

  .usage-item {
    grid-template-columns: 1fr;
  }

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

  .coverage-panel {
    padding: 24px 20px;
  }
}