.node-hero {
  position: relative;
  padding-top: clamp(70px, 9vw, 118px);
  background:
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg));
}

.node-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.72;
  background-image:
    linear-gradient(var(--color-grid-line) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, var(--color-transparent) 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, var(--color-text), var(--color-transparent));
  pointer-events: none;
}

.node-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: clamp(42px, 7vw, 94px);
  align-items: center;
}

.node-hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.node-hero-copy h1 {
  max-width: 720px;
  margin-top: 20px;
}

.node-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 30px;
}

.node-hero-note {
  max-width: 650px;
  margin: 18px 0 0;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
}

.node-facts {
  position: relative;
  z-index: 2;
  margin-top: clamp(54px, 8vw, 92px);
}

.coverage-frame {
  position: relative;
  min-height: 410px;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--color-white-faint), var(--color-transparent)),
    var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
}

.coverage-frame::before {
  position: absolute;
  inset: 44px;
  content: "";
  background:
    radial-gradient(circle at 22% 48%, var(--color-aurora-blue), var(--color-transparent) 25%),
    radial-gradient(circle at 53% 38%, var(--color-aurora-green), var(--color-transparent) 24%),
    radial-gradient(circle at 80% 62%, var(--color-aurora-orange), var(--color-transparent) 28%);
  filter: blur(28px);
  opacity: 0.68;
}

.coverage-frame::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    repeating-linear-gradient(90deg, var(--color-transparent) 0 63px, var(--color-grid-line) 63px 64px),
    repeating-linear-gradient(0deg, var(--color-transparent) 0 63px, var(--color-grid-line) 63px 64px);
}

.coverage-corner {
  position: absolute;
  z-index: 4;
  width: 58px;
  height: 58px;
  border-color: var(--color-text);
  border-style: solid;
}

.coverage-corner-tl {
  top: 22px;
  left: 22px;
  border-width: 6px 0 0 6px;
  border-radius: var(--radius-md) 0 0;
}

.coverage-corner-tr {
  top: 22px;
  right: 22px;
  border-width: 6px 6px 0 0;
  border-radius: 0 var(--radius-md) 0 0;
}

.coverage-corner-bl {
  bottom: 22px;
  left: 22px;
  border-width: 0 0 6px 6px;
  border-radius: 0 0 0 var(--radius-md);
}

.coverage-corner-br {
  right: 22px;
  bottom: 22px;
  border-width: 0 6px 6px 0;
  border-radius: 0 0 var(--radius-md);
}

.coverage-axis {
  position: absolute;
  top: 30px;
  right: 92px;
  left: 92px;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.coverage-track {
  position: absolute;
  top: 50%;
  right: 70px;
  left: 70px;
  z-index: 5;
  height: 2px;
  background: linear-gradient(90deg, var(--color-aurora-blue), var(--color-aurora-cyan), var(--color-aurora-green), var(--color-accent));
  transform: translateY(-50%);
}

.coverage-track::before,
.coverage-track::after {
  position: absolute;
  right: 0;
  left: 0;
  height: 1px;
  content: "";
  background: var(--color-accent-line);
  transform-origin: center;
}

.coverage-track::before {
  top: -52px;
  transform: rotate(9deg);
}

.coverage-track::after {
  top: 48px;
  transform: rotate(-7deg);
}

.coverage-point {
  position: absolute;
  z-index: 2;
  width: 13px;
  height: 13px;
  background: var(--color-panel);
  border: 3px solid var(--color-accent);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 0 7px var(--color-accent-glass);
  transform: translate(-50%, -50%);
}

.point-a {
  top: 50%;
  left: 4%;
}

.point-b {
  top: 50%;
  left: 23%;
}

.point-c {
  top: 50%;
  left: 42%;
}

.point-d {
  top: 50%;
  left: 62%;
}

.point-e {
  top: 50%;
  left: 80%;
}

.point-f {
  top: 50%;
  left: 98%;
}

.coverage-label {
  position: absolute;
  right: 42px;
  bottom: 32px;
  z-index: 5;
  margin: 0;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.directory-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.3fr) minmax(0, 1fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: start;
}

.directory-index {
  position: sticky;
  top: var(--toc-offset);
  padding: 24px 0 24px 22px;
  border-left: 1px solid var(--color-accent);
}

.directory-index h3 {
  font-size: 22px;
}

.directory-index p {
  font-size: 14px;
}

.directory-legend {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--color-border);
  list-style: none;
}

.directory-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.legend-mark {
  width: 18px;
  height: 3px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
}

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

.legend-relay {
  background: var(--color-aurora-cyan);
}

.legend-direct {
  background: var(--color-text-dim);
}

.directory-content {
  min-width: 0;
}

.table-note {
  margin: 18px 4px 0;
  color: var(--color-text-dim);
  font-size: 13px;
}

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

.route-entry {
  display: grid;
  grid-template-columns: minmax(190px, 0.3fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 72px);
  padding-top: clamp(34px, 5vw, 58px);
  padding-bottom: clamp(34px, 5vw, 58px);
  border-bottom: 1px solid var(--color-border);
}

.route-entry-featured {
  background:
    linear-gradient(90deg, var(--color-accent-glass), var(--color-transparent));
}

.route-entry-code {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.route-entry-code .mono-label {
  color: var(--color-text-dim);
}

.route-entry-copy {
  max-width: 820px;
}

.route-entry-copy h3 {
  margin-bottom: 18px;
}

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

.selection-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 0.58fr);
  gap: clamp(46px, 8vw, 112px);
  align-items: start;
}

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

.selection-rule {
  margin-top: 34px;
  padding: 22px;
  background: var(--color-panel-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.selection-rule p {
  margin: 0;
  color: var(--color-text-muted);
}

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

.use-case {
  padding-top: 34px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--color-border);
}

.use-case-heading {
  display: flex;
  gap: 15px;
  align-items: center;
}

.use-case-heading h3 {
  margin-bottom: 0;
}

.use-case-mark {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-xs);
  transform: rotate(45deg);
}

.use-case p {
  margin: 18px 0 0 33px;
}

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

.switching-step {
  min-width: 0;
  padding: clamp(24px, 4vw, 42px);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.switching-step h3 {
  font-size: 23px;
}

.switching-step p:last-child {
  margin-bottom: 0;
}

.coverage-summary {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(300px, 0.38fr);
  gap: clamp(40px, 8vw, 106px);
  align-items: center;
}

.coverage-summary-copy {
  max-width: 790px;
}

.region-wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 14px;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.region-badge {
  display: flex;
  min-height: 62px;
  min-width: 0;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  background:
    linear-gradient(145deg, var(--color-white-faint), var(--color-transparent)),
    var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
}

.region-badge:first-child,
.region-badge:last-child {
  color: var(--color-accent-soft);
  border-color: var(--color-accent-line);
}

.access-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  margin-top: clamp(54px, 7vw, 88px);
  padding-top: 34px;
  align-items: center;
  border-top: 1px solid var(--color-border-bright);
}

.access-note h3 {
  margin-bottom: 8px;
}

.access-note p {
  max-width: 820px;
  margin-bottom: 0;
}

@media (max-width: 960px) {
  .node-hero-grid,
  .directory-layout,
  .selection-layout,
  .coverage-summary {
    grid-template-columns: minmax(0, 1fr);
  }

  .coverage-frame {
    min-height: 340px;
  }

  .directory-index,
  .selection-intro {
    position: static;
  }

  .directory-index {
    max-width: 680px;
  }

  .selection-intro {
    max-width: 760px;
  }

  .region-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .node-hero {
    padding-top: 58px;
  }

  .coverage-frame {
    min-height: 280px;
  }

  .coverage-axis,
  .coverage-label {
    display: none;
  }

  .coverage-track {
    right: 44px;
    left: 44px;
  }

  .route-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .route-entry-code {
    gap: 10px;
  }

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

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

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

  .access-note .button {
    width: fit-content;
  }
}

@media (max-width: 520px) {
  .node-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .node-hero-actions .button {
    width: 100%;
  }

  .coverage-frame {
    min-height: 230px;
  }

  .coverage-frame::before {
    inset: 26px;
  }

  .coverage-corner {
    width: 40px;
    height: 40px;
  }

  .coverage-corner-tl,
  .coverage-corner-tr {
    top: 14px;
  }

  .coverage-corner-bl,
  .coverage-corner-br {
    bottom: 14px;
  }

  .coverage-corner-tl,
  .coverage-corner-bl {
    left: 14px;
  }

  .coverage-corner-tr,
  .coverage-corner-br {
    right: 14px;
  }

  .coverage-track {
    right: 30px;
    left: 30px;
  }

  .directory-index {
    padding-left: 16px;
  }

  .use-case p {
    margin-left: 0;
  }

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

  .access-note .button {
    width: 100%;
  }
}