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

.nodes-hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.28;
  background-image:
    linear-gradient(30deg, var(--color-accent-a08) 12%, transparent 12.5%, transparent 87%, var(--color-accent-a08) 87.5%),
    linear-gradient(150deg, var(--color-accent-a08) 12%, transparent 12.5%, transparent 87%, var(--color-accent-a08) 87.5%),
    linear-gradient(30deg, var(--color-accent-a08) 12%, transparent 12.5%, transparent 87%, var(--color-accent-a08) 87.5%);
  background-position: 0 0, 0 0, 34px 60px;
  background-size: 68px 120px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, var(--color-text), transparent);
  mask-image: linear-gradient(to bottom, var(--color-text), transparent);
}

.nodes-hero-glow {
  position: absolute;
  top: -360px;
  right: -240px;
  width: 900px;
  height: 900px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-accent-a16), var(--color-accent-a08) 42%, transparent 70%);
  pointer-events: none;
}

.nodes-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: calc(100svh - var(--header-height));
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  align-items: center;
  gap: 68px;
  padding-top: 72px;
  padding-bottom: 72px;
}

.nodes-hero-copy h1 {
  max-width: 720px;
  margin-top: 22px;
  font-size: clamp(48px, 5vw, 68px);
}

.nodes-hero-lead {
  max-width: 650px;
  color: var(--color-text-muted);
  font-size: 18px;
}

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

.nodes-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.coverage-board {
  position: relative;
  padding: 24px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel), 0 0 54px var(--color-accent-a12);
}

.coverage-board::before {
  position: absolute;
  inset: -1px;
  padding: 1px;
  border-radius: var(--radius-panel);
  background: linear-gradient(145deg, var(--color-accent-a45), transparent 38%, var(--color-border));
  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;
}

.coverage-board-head {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
}

.coverage-board-head span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.coverage-board-head i {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-a45);
}

.coverage-core {
  position: relative;
  display: grid;
  min-height: 390px;
  place-items: center;
}

.coverage-ring {
  position: absolute;
  width: 310px;
  height: 310px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}

.coverage-ring::before,
.coverage-ring::after {
  position: absolute;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  content: "";
}

.coverage-ring::before {
  inset: 38px;
}

.coverage-ring::after {
  inset: 78px;
  border-color: var(--color-accent-dark);
  box-shadow: 0 0 24px var(--color-accent-a12);
}

.coverage-path {
  position: absolute;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-a45);
  transform-origin: left center;
}

.coverage-path::before,
.coverage-path::after {
  position: absolute;
  top: -4px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  content: "";
}

.coverage-path::before {
  left: -3px;
}

.coverage-path::after {
  right: -3px;
}

.coverage-path-a {
  top: 81px;
  left: 57px;
  width: 196px;
  transform: rotate(28deg);
}

.coverage-path-b {
  top: 223px;
  left: 44px;
  width: 220px;
  transform: rotate(-23deg);
}

.coverage-path-c {
  top: 153px;
  left: 28px;
  width: 252px;
  transform: rotate(1deg);
}

.coverage-hub {
  position: relative;
  z-index: 2;
  display: flex;
  width: 148px;
  height: 168px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 18px;
  background: var(--color-panel-raised);
  color: var(--color-text);
  text-align: center;
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  filter: drop-shadow(0 0 20px var(--color-accent-a28));
}

.coverage-hub::before {
  position: absolute;
  inset: 5px;
  border: 1px solid var(--color-accent);
  content: "";
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
}

.coverage-hub-mark {
  width: 18px;
  height: 21px;
  margin-bottom: 9px;
  background: var(--color-accent);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
}

.coverage-hub strong,
.coverage-hub small {
  position: relative;
  z-index: 1;
}

.coverage-hub small {
  margin-top: 5px;
  font-size: 11px;
}

.region-badges {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 9px;
}

.region-badges a {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
  font-size: 13px;
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.region-badges a:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-dark);
  color: var(--color-text);
}

.region-badges span {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
}

.nodes-document {
  padding-top: 54px;
  padding-bottom: 104px;
}

.nodes-document > .toc-tabs {
  top: 12px;
}

.nodes-intro {
  padding-top: 52px;
}

.nodes-intro > .section-head {
  max-width: 880px;
}

.nodes-intro > .section-head p,
.line-types .section-head p,
.selection-guide .section-head p,
.route-maintenance .section-head p {
  color: var(--color-text-muted);
}

.region-block {
  padding-top: 62px;
  scroll-margin-top: var(--toc-offset);
}

.region-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  align-items: end;
  gap: 36px;
  margin-bottom: 22px;
}

.region-heading h3 {
  margin-bottom: 0;
  font-size: clamp(27px, 3vw, 38px);
}

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

.region-code {
  display: block;
  margin-bottom: 7px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.route-type {
  display: inline-flex;
  max-width: 100%;
  min-height: 27px;
  align-items: center;
  padding: 4px 11px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.route-type-accent {
  border-color: var(--color-accent-dark);
  color: var(--color-accent);
}

.line-types,
.selection-guide,
.route-maintenance,
.node-faq {
  border-top: 1px solid var(--color-border);
}

.type-ledger {
  border-top: 1px solid var(--color-border);
}

.type-entry {
  display: grid;
  grid-template-columns: 138px minmax(0, 1fr);
  gap: 36px;
  padding-top: 42px;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--color-border);
}

.type-mark {
  display: grid;
  width: 114px;
  height: 128px;
  place-items: center;
  align-self: start;
  border: 1px solid var(--color-accent-dark);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  filter: drop-shadow(0 0 16px var(--color-accent-a12));
}

.type-copy {
  max-width: 850px;
}

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

.use-case-list {
  display: grid;
  gap: 14px;
}

.use-case {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  gap: 28px;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.use-case-index {
  display: grid;
  width: 68px;
  height: 78px;
  place-items: center;
  align-self: start;
  border: 1px solid var(--color-border-strong);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
}

.use-case h3 {
  margin-bottom: 12px;
}

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

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

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

.maintenance-card {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
}

.maintenance-card:nth-child(3n + 2) {
  background: var(--color-panel-raised);
}

.maintenance-card p {
  color: var(--color-text-muted);
}

.maintenance-card .article-link {
  margin-top: 4px;
}

.node-faq .section-head {
  margin-bottom: 30px;
}

.node-faq-link {
  margin-top: 28px;
}

.route-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 40px;
  margin-top: 28px;
  padding: 42px;
  overflow: hidden;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(circle at right bottom, var(--color-accent-a16), transparent 38%),
    var(--color-panel-raised);
  box-shadow: 0 0 48px var(--color-accent-a12);
}

.route-summary-label {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.route-summary h2 {
  margin-bottom: 10px;
  font-size: clamp(30px, 4vw, 46px);
}

.route-summary p:last-child {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.route-summary-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

@media (max-width: 1060px) {
  .nodes-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }

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

  .coverage-board {
    max-width: 760px;
  }

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

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

@media (max-width: 768px) {
  .nodes-hero-inner {
    min-height: auto;
    padding-top: 58px;
    padding-bottom: 70px;
  }

  .nodes-hero-copy h1 {
    font-size: clamp(30px, 9.4vw, 40px);
  }

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

  .nodes-hero-glow {
    top: -320px;
    right: -540px;
  }

  .coverage-core {
    min-height: 320px;
  }

  .coverage-ring {
    width: 260px;
    height: 260px;
  }

  .coverage-ring::before {
    inset: 32px;
  }

  .coverage-ring::after {
    inset: 67px;
  }

  .coverage-path-a {
    top: 70px;
    left: 49px;
    width: 164px;
  }

  .coverage-path-b {
    top: 187px;
    left: 38px;
    width: 184px;
  }

  .coverage-path-c {
    top: 129px;
    left: 24px;
    width: 210px;
  }

  .coverage-hub {
    width: 126px;
    height: 144px;
  }

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

  .nodes-document {
    padding-top: 34px;
    padding-bottom: 76px;
  }

  .nodes-intro {
    padding-top: 34px;
  }

  .region-heading {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: 16px;
  }

  .type-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .type-mark {
    width: 92px;
    height: 104px;
  }

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

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

  .route-summary {
    padding: 30px;
  }
}

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

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

  .coverage-board {
    padding: 16px;
  }

  .coverage-board-head {
    font-size: 9px;
  }

  .coverage-core {
    min-height: 286px;
  }

  .coverage-ring {
    transform: scale(0.88);
  }

  .region-badges a {
    min-height: 54px;
  }

  .region-block {
    padding-top: 48px;
  }

  .use-case,
  .maintenance-card {
    padding: 22px;
  }

  .use-case-index {
    width: 60px;
    height: 68px;
  }

  .route-summary {
    padding: 24px;
  }

  .route-summary-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .route-summary-actions .btn-primary,
  .route-summary-actions .btn-secondary {
    width: 100%;
  }
}

@media (max-width: 380px) {
  .coverage-core {
    min-height: 252px;
  }

  .coverage-ring {
    transform: scale(0.76);
  }

  .coverage-hub {
    transform: scale(0.88);
  }

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