/* Sensor topology scroll narrative — commit 20 */

.topology-page {
  --topology-accent: #f97316;
  --topology-cam: #38bdf8;
  --topology-radar: #a78bfa;
  --topology-lidar: #22c55e;
  --topology-can: #fb923c;
}

.topology-main {
  position: relative;
}

.topology-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.topology-progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--topology-cam), var(--topology-radar), var(--topology-accent));
  transition: width 0.15s ease-out;
}

.topology-stack {
  scroll-snap-type: y proximity;
}

.topology-panel {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  padding: calc(var(--header-height, 72px) + 2rem) 0 4rem;
  scroll-snap-align: start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topology-panel__inner {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 960px) {
  .topology-panel__inner {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    gap: 3rem;
  }
}

.topology-panel__copy .eyebrow {
  color: var(--topology-accent);
}

.topology-panel__copy h2 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.15;
}

.topology-panel__copy p {
  color: var(--text2, #9ca3af);
  max-width: 42rem;
  line-height: 1.65;
}

.topology-panel__copy ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--text2, #9ca3af);
}

.topology-diagram {
  position: relative;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 14, 19, 0.85);
  overflow: hidden;
}

.topology-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.topology-diagram .node {
  transition: opacity 0.35s ease, stroke-width 0.35s ease;
}

.topology-diagram .edge {
  transition: opacity 0.35s ease;
}

.topology-panel[data-stage="camera"] .node--cam,
.topology-panel[data-stage="radar"] .node--radar,
.topology-panel[data-stage="lidar"] .node--lidar,
.topology-panel[data-stage="fusion"] .node--fusion,
.topology-panel[data-stage="fleet"] .node--fleet {
  opacity: 1;
}

.topology-panel[data-stage="camera"] .node:not(.node--cam),
.topology-panel[data-stage="radar"] .node:not(.node--radar),
.topology-panel[data-stage="lidar"] .node:not(.node--lidar),
.topology-panel[data-stage="fusion"] .node:not(.node--fusion),
.topology-panel[data-stage="fleet"] .node:not(.node--fleet) {
  opacity: 0.35;
}

.topology-panel[data-stage="intro"] .node {
  opacity: 0.75;
}

.topology-panel.is-active .topology-diagram {
  box-shadow: 0 0 0 1px rgba(249, 115, 22, 0.25), 0 24px 48px rgba(0, 0, 0, 0.35);
}

.topology-fleet-queue {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
  font-family: var(--mono, ui-monospace, monospace);
  font-size: 0.75rem;
}

.topology-fleet-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.75rem;
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.topology-fleet-row .tier {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.topology-fleet-row .tier--caution { color: #fbbf24; }
.topology-fleet-row .tier--critical { color: #f87171; }
.topology-fleet-row .tier--nominal { color: #86efac; }

.topology-cta {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.topology-static-fallback .topology-progress {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .topology-stack {
    scroll-snap-type: none;
  }

  .topology-progress {
    display: none;
  }

  .topology-diagram .node,
  .topology-diagram .edge {
    transition: none;
  }

  .topology-panel .node {
    opacity: 1 !important;
  }
}