.nodes-hero {
  position: relative;
  padding-top: clamp(68px, 8vw, 116px);
  padding-bottom: clamp(68px, 8vw, 112px);
  background-image:
    radial-gradient(circle at 84% 22%, var(--color-nebula-pink), var(--color-transparent) 30%),
    radial-gradient(circle at 74% 68%, var(--color-nebula-orange), var(--color-transparent) 34%);
}

.nodes-hero::before,
.nodes-hero::after {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 2px;
  background: var(--color-star);
  box-shadow:
    58px 35px 0 var(--color-star-soft),
    126px 92px 0 var(--color-star),
    214px 18px 0 var(--color-star-soft),
    286px 132px 0 var(--color-star),
    358px 62px 0 var(--color-star-soft);
  content: "";
  pointer-events: none;
}

.nodes-hero::before {
  top: 16%;
  left: 4%;
}

.nodes-hero::after {
  right: 26%;
  bottom: 18%;
  transform: rotate(18deg);
}

.nodes-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(40px, 7vw, 104px);
  align-items: center;
}

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

.nodes-hero-copy h1 {
  margin: 18px 0 22px;
}

.nodes-hero-lead {
  max-width: 610px;
  margin-bottom: 30px;
  color: var(--color-text-muted);
  font-size: clamp(1.02rem, 1.6vw, 1.22rem);
  line-height: 1.85;
}

.nodes-hero-lead strong {
  color: var(--color-text);
}

.nodes-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.route-mosaic {
  position: relative;
  min-height: 470px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel-glass);
  box-shadow: var(--shadow-card);
}

.route-mosaic::before {
  position: absolute;
  inset: 24px;
  border: 1px dashed var(--color-border-soft);
  border-radius: var(--radius-lg);
  content: "";
}

.route-mosaic-grid {
  position: absolute;
  top: 56px;
  right: 46px;
  bottom: 56px;
  left: 46px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.route-pixel {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.pixel-muted {
  background: var(--color-panel-raised);
}

.pixel-accent {
  background: var(--color-accent);
}

.pixel-coral {
  background: var(--color-coral);
}

.pixel-lime {
  background: var(--color-lime);
}

.pixel-pink {
  background: var(--color-pink);
}

.region-plate {
  position: absolute;
  display: flex;
  min-width: 138px;
  flex-direction: column;
  padding: 15px 17px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-bg-deep);
  box-shadow: var(--shadow-card);
}

.region-plate span,
.region-plate small {
  font-family: var(--font-mono);
}

.region-plate span {
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.region-plate strong {
  margin: 3px 0;
  font-family: var(--font-display);
  font-size: 1rem;
}

.region-plate small {
  color: var(--color-text-muted);
  font-size: 0.61rem;
  letter-spacing: 0.04em;
}

.region-plate-apac {
  top: 30px;
  right: 24px;
}

.region-plate-na {
  top: 38%;
  left: 18px;
}

.region-plate-na span {
  color: var(--color-lime);
}

.region-plate-eu {
  right: 18px;
  bottom: 24px;
}

.region-plate-eu span {
  color: var(--color-pink);
}

.region-plate-global {
  bottom: 16px;
  left: 28%;
}

.region-plate-global span {
  color: var(--color-coral);
}

.nodes-document {
  padding-top: clamp(54px, 7vw, 88px);
}

.nodes-section {
  padding-top: clamp(70px, 8vw, 110px);
  padding-bottom: clamp(70px, 8vw, 110px);
  border-bottom: 1px solid var(--color-border-soft);
}

.nodes-section:first-of-type {
  padding-top: 32px;
}

.section-heading {
  max-width: 850px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin: 14px 0 16px;
}

.country-mark {
  display: inline-grid;
  width: 34px;
  height: 25px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.mark-accent {
  background: var(--color-accent);
}

.mark-coral {
  background: var(--color-coral);
}

.mark-lime {
  background: var(--color-lime);
}

.mark-pink {
  background: var(--color-pink);
}

.route-type {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  padding: 5px 10px;
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  white-space: nowrap;
}

.route-type-iepl {
  color: var(--color-ink);
  background: var(--color-lime);
}

.route-type-relay {
  color: var(--color-text);
  background: var(--color-pink);
}

.route-type-direct {
  color: var(--color-text);
  background: var(--color-panel-alt);
}

.route-explain-list {
  display: grid;
  gap: 22px;
}

.route-explain-card {
  display: grid;
  grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.route-explain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.route-explain-relay {
  grid-template-columns: minmax(0, 1.28fr) minmax(250px, 0.72fr);
  background: var(--color-panel-raised);
}

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

.route-explain-copy h3 {
  margin: 10px 0 18px;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
}

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

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

.route-index {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.route-explain-relay .route-index {
  color: var(--color-pink);
}

.route-explain-direct .route-index {
  color: var(--color-lime);
}

.route-diagram {
  display: flex;
  min-height: 210px;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  background: var(--color-bg-deep);
}

.diagram-node {
  display: grid;
  width: 62px;
  height: 62px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-panel);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 850;
}

.diagram-node-lit {
  color: var(--color-ink);
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
  transform: translateY(-8px);
}

.route-explain-relay .diagram-node-lit {
  color: var(--color-text);
  background: var(--color-pink);
}

.route-explain-direct .diagram-node-lit {
  background: var(--color-lime);
}

.diagram-link {
  width: clamp(22px, 4vw, 62px);
  height: 4px;
  flex: 1 1 auto;
  background: var(--color-border);
}

.diagram-link-dashed {
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--color-pink), var(--color-pink) 7px, var(--color-transparent) 7px, var(--color-transparent) 13px);
}

.diagram-link-wide {
  height: 7px;
  background: var(--color-lime);
}

.use-case-board {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.use-case-row {
  display: grid;
  grid-template-columns: minmax(190px, 0.34fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 68px);
  padding: clamp(28px, 4vw, 48px);
}

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

.use-case-row:nth-child(even) {
  background: var(--color-panel-raised);
}

.use-case-label {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.use-case-label h3 {
  margin: 4px 0 0;
  font-size: 1.28rem;
}

.case-block {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  border-radius: 4px;
  box-shadow: var(--shadow-soft);
}

.case-block-accent {
  background: var(--color-accent);
}

.case-block-coral {
  background: var(--color-coral);
}

.case-block-lime {
  background: var(--color-lime);
}

.case-block-pink {
  background: var(--color-pink);
}

.case-block-warning {
  background: var(--color-warning);
}

.use-case-content p {
  color: var(--color-text-muted);
}

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

.selection-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.flow-card {
  position: relative;
  min-height: 100%;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.flow-card::after {
  position: absolute;
  top: 24px;
  right: -10px;
  z-index: 2;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--color-accent);
  content: "";
  transform: rotate(45deg);
}

.flow-card:last-child::after {
  display: none;
}

.flow-card:nth-child(2)::after {
  background: var(--color-pink);
}

.flow-card:nth-child(3)::after {
  background: var(--color-lime);
}

.flow-code {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.flow-card:nth-child(2) .flow-code {
  color: var(--color-pink);
}

.flow-card:nth-child(3) .flow-code {
  color: var(--color-lime);
}

.flow-card:nth-child(4) .flow-code {
  color: var(--color-coral);
}

.flow-card h3 {
  margin: 12px 0;
  font-size: 1.17rem;
}

.flow-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.nodes-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: center;
  margin-top: clamp(72px, 9vw, 124px);
  padding: clamp(32px, 6vw, 62px);
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-card);
}

.nodes-summary-copy {
  max-width: 850px;
}

.nodes-summary-copy h2 {
  margin: 12px 0;
}

.nodes-summary-copy p {
  margin: 0;
  color: var(--color-text-muted);
}

.nodes-summary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 1060px) {
  .nodes-hero-grid {
    grid-template-columns: 1fr;
  }

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

  .route-mosaic {
    width: 100%;
    max-width: 760px;
    min-height: 420px;
  }

  .selection-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-card:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 820px) {
  .route-explain-card,
  .route-explain-relay {
    grid-template-columns: 1fr;
  }

  .route-explain-relay .route-explain-copy {
    order: 2;
  }

  .route-explain-relay .route-diagram {
    order: 1;
  }

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

  .nodes-summary {
    grid-template-columns: 1fr;
  }

  .nodes-summary-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .nodes-hero {
    padding-top: 54px;
    padding-bottom: 58px;
  }

  .nodes-hero::before,
  .nodes-hero::after {
    display: none;
  }

  .route-mosaic {
    min-height: 350px;
  }

  .route-mosaic::before {
    inset: 14px;
  }

  .route-mosaic-grid {
    top: 38px;
    right: 25px;
    bottom: 38px;
    left: 25px;
    gap: 8px;
  }

  .region-plate {
    min-width: 116px;
    padding: 11px 12px;
  }

  .region-plate-global {
    left: 22%;
  }

  .nodes-document {
    padding-top: 44px;
  }

  .nodes-section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .route-explain-card {
    padding: 22px;
  }

  .route-diagram {
    min-height: 160px;
    padding: 16px;
  }

  .diagram-node {
    width: 52px;
    height: 52px;
    font-size: 0.55rem;
  }

  .use-case-row {
    padding: 24px 20px;
  }

  .selection-flow {
    grid-template-columns: 1fr;
  }

  .flow-card::after {
    top: auto;
    right: 24px;
    bottom: -10px;
  }

  .flow-card:nth-child(2)::after {
    display: block;
  }

  .flow-card:last-child::after {
    display: none;
  }

  .nodes-summary-actions {
    width: 100%;
  }

  .nodes-summary-actions .btn {
    flex: 1 1 150px;
  }
}

@media (max-width: 390px) {
  .route-mosaic {
    min-height: 330px;
  }

  .region-plate {
    min-width: 104px;
  }

  .region-plate small {
    display: none;
  }

  .region-plate-na {
    top: 40%;
    left: 12px;
  }

  .region-plate-apac {
    top: 20px;
    right: 14px;
  }

  .region-plate-eu {
    right: 12px;
    bottom: 18px;
  }

  .region-plate-global {
    bottom: 12px;
    left: 18%;
  }

  .route-explain-card {
    padding: 18px;
  }

  .diagram-node {
    width: 47px;
    height: 47px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .route-explain-card {
    transition: none;
  }

  .route-explain-card:hover {
    transform: none;
  }
}