.null-graphic .state-rail {
  fill: none;
  stroke: rgba(214, 199, 150, 0.28);
  stroke-width: 1.5;
  stroke-linecap: round;
}

.null-node circle {
  fill: rgba(9, 13, 18, 0.84);
  stroke: rgba(99, 214, 198, 0.6);
  stroke-width: 1.5;
}

.null-node--active circle:not(.plant-glow) {
  stroke: rgba(212, 182, 111, 0.72);
}

.null-node--zero circle {
  stroke: rgba(210, 99, 92, 0.68);
}

.null-node text,
.control-gate text,
.operator-switch text {
  fill: rgba(236, 232, 220, 0.76);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.09em;
  text-anchor: middle;
}

.pause-bars,
.zero-mark {
  fill: none;
  stroke: rgba(212, 182, 111, 0.82);
  stroke-width: 6;
  stroke-linecap: round;
}

.zero-mark {
  stroke: rgba(210, 99, 92, 0.82);
}

.control-gate rect,
.operator-switch rect {
  fill: rgba(13, 16, 22, 0.82);
  stroke: rgba(214, 199, 150, 0.3);
  stroke-width: 1.5;
}

.operator-switch circle {
  fill: rgba(99, 214, 198, 0.18);
  stroke: rgba(99, 214, 198, 0.72);
  stroke-width: 1.5;
  animation: switchPulse 3.8s ease-in-out infinite;
}

.operator-switch path {
  fill: none;
  stroke: rgba(236, 232, 220, 0.72);
  stroke-width: 2;
  stroke-linecap: round;
}

.sources-block {
  margin: 2.2rem 0 0;
  border-top: 1px solid rgba(214, 199, 150, 0.18);
  padding-top: 1.1rem;
  color: var(--muted);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  line-height: 1.55;
}

.sources-block p {
  margin-bottom: 0.7rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sources-block ul {
  margin: 0;
  padding-left: 1.1rem;
}

.sources-block li + li {
  margin-top: 0.45rem;
}

@keyframes switchPulse {
  50% {
    transform: translateX(40px);
  }
}