/* One scoped teaching exhibit: location and responsibility, not an engineering topology. */
.signal-exhibit {
  --signal-night: #102b3d;
  --signal-light: #e8f0e9;
  --signal-muted: #afc3c8;
  --signal-teal: #8bd1c3;
  --signal-copper: #e2bb82;
  min-width: 0;
  padding: 28px;
  color: var(--signal-light);
  background: var(--signal-night);
  border: 1px solid #315063;
  border-radius: 5px;
  overflow: hidden;
}
.signal-stage-heading { padding: 2px 2px 0; display:flex; align-items:center; justify-content:space-between; gap:14px; }
.signal-stage-hint { font-size:.6875rem; color:var(--signal-muted); }
.signal-exhibit .signal-kicker { color: var(--signal-copper); font-size: .75rem; letter-spacing: .12em; }
.signal-exhibit .signal-stage-heading h2 { color: var(--signal-light); font-family: var(--serif, serif); font-size: clamp(1.55rem, 2.3vw, 2rem); line-height: 1.5; margin: 13px 0 10px; font-weight: 500; letter-spacing: -.03em; }
.signal-exhibit .signal-stage-heading p { color: var(--signal-muted); font-size: .875rem; line-height: 1.7; margin: 0; }
.signal-canvas { margin: 10px -12px 12px; position: relative; }
.signal-map { display: block; width: 100%; height: auto; max-height:300px; overflow: visible; }
.signal-map text { font-family: var(--sans, sans-serif); font-size: 20px; font-weight: 600; letter-spacing: .015em; fill: currentColor; }
.signal-map .signal-zone-labels { color: #809eab; }
.signal-map .signal-zone-labels text { font-size: 14px; font-weight: 400; letter-spacing: .12em; }
.signal-part { color: #afc6ce; }
.signal-device-body { fill: #1a3c50; stroke: #71939f; stroke-width: 1.7; }
.signal-halo { fill: transparent; stroke: transparent; stroke-width: 1; }
.signal-information-path { stroke: #526f7e; stroke-width: 2; stroke-dasharray: 6 6; opacity: .65; }
.signal-radio-waves { stroke: #688998; }
.signal-device-dot, .signal-position-dot { fill: currentColor; }
.signal-map .signal-label-cn { font-size: 18px; font-weight: 400; }
.signal-map .signal-optional-label { font-size: 14px; font-weight: 400; }
.signal-optional-device { stroke-dasharray: 5 4; }
.signal-exhibit[data-selected="0"] .signal-part-rbc,
.signal-exhibit[data-selected="1"] .signal-part-balise { color: var(--signal-copper); }
.signal-exhibit[data-selected="2"] .signal-part-atp,
.signal-exhibit[data-selected="3"] .signal-part-ato { color: var(--signal-teal); }
.signal-exhibit[data-selected="0"] .signal-part-rbc .signal-halo,
.signal-exhibit[data-selected="1"] .signal-part-balise .signal-halo { fill: #e2bb8210; stroke: #e2bb8240; }
.signal-exhibit[data-selected="2"] .signal-part-atp .signal-halo,
.signal-exhibit[data-selected="3"] .signal-part-ato .signal-halo { fill: #8bd1c32c; stroke: #8bd1c399; }
.signal-exhibit[data-selected="0"] .signal-part-rbc .signal-device-body,
.signal-exhibit[data-selected="1"] .signal-part-balise .signal-device-body { fill: #4c4437; stroke: var(--signal-copper); stroke-width: 2; }
.signal-exhibit[data-selected="2"] .signal-part-atp .signal-device-body,
.signal-exhibit[data-selected="3"] .signal-part-ato .signal-device-body { fill: #244e51; stroke: var(--signal-teal); stroke-width: 2; }
.signal-exhibit[data-selected="0"] .signal-rbc-link,
.signal-exhibit[data-selected="1"] .signal-balise-link { stroke: var(--signal-copper); stroke-width: 3; opacity: 1; }
.signal-exhibit[data-selected="0"] .signal-radio-waves { stroke: var(--signal-copper); }
.signal-device-buttons { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.signal-exhibit .signal-device-buttons button { display: flex; min-width: 0; align-items: center; gap: 10px; padding: 13px 12px; min-height: 75px; color: var(--signal-light); background: #ffffff03; border: 1px solid #426071; border-radius: 3px; text-align: left; font: inherit; cursor: pointer; }
.signal-exhibit .signal-device-buttons button:hover { border-color: #a4bfca; background: #ffffff07; }
.signal-exhibit .signal-device-buttons button:focus-visible { outline: 3px solid #f4e0bb; outline-offset: 3px; }
.signal-button-number { align-self: flex-start; padding-top: 1px; color: #8ba7b6; font-size: .6875rem; font-variant-numeric: tabular-nums; }
.signal-button-copy { min-width: 0; flex: 1; }
.signal-button-copy strong { display: block; font-size: .9375rem; font-weight: 500; line-height: 1.5; }
.signal-button-copy small { display: block; margin-top: 4px; color: var(--signal-muted); font-size: .6875rem; line-height: 1.65; }
.signal-button-arrow { color: #8ba7b6; font-size: .875rem; flex: 0 0 auto; }
.signal-exhibit .signal-device-buttons button[aria-pressed="true"] { border-color: var(--signal-copper); background: #e2bb820f; }
.signal-exhibit .signal-device-buttons button[aria-pressed="true"] .signal-button-number,
.signal-exhibit .signal-device-buttons button[aria-pressed="true"] .signal-button-arrow { color: var(--signal-copper); }
.signal-exhibit[data-selected="2"] .signal-device-buttons button[aria-pressed="true"],
.signal-exhibit[data-selected="3"] .signal-device-buttons button[aria-pressed="true"] { border-color: var(--signal-teal); background: #8bd1c30c; }
.signal-exhibit[data-selected="2"] .signal-device-buttons button[aria-pressed="true"] .signal-button-number,
.signal-exhibit[data-selected="2"] .signal-device-buttons button[aria-pressed="true"] .signal-button-arrow,
.signal-exhibit[data-selected="3"] .signal-device-buttons button[aria-pressed="true"] .signal-button-number,
.signal-exhibit[data-selected="3"] .signal-device-buttons button[aria-pressed="true"] .signal-button-arrow { color: var(--signal-teal); }
.signal-exhibit .signal-current { display: flex; align-items: flex-start; gap: 9px; margin: 15px 0 0; min-height: 2em; font-size: .8125rem; line-height: 1.8; color: #d9e5e4; }
.signal-current-dot { display: block; flex: 0 0 5px; height: 5px; margin-top: 9px; background: var(--signal-copper); border-radius: 50%; }
.signal-exhibit[data-selected="2"] .signal-current-dot,
.signal-exhibit[data-selected="3"] .signal-current-dot { background: var(--signal-teal); }
.signal-exhibit .signal-stage-note { border-top: 1px solid #3a5666; margin: 12px 0 0; padding-top: 12px; color: #9cb5c0; font-size: .6875rem; line-height: 1.8; }
@media (min-width: 901px) { .signal-exhibit { align-self: start; } }
@media (min-width: 1100px) { .signal-device-buttons { grid-template-columns:repeat(4,minmax(0,1fr)); } .signal-exhibit .signal-device-buttons button { display:block; padding:11px 12px; } .signal-button-number { display:none; } .signal-button-copy strong { font-size:.8125rem; } .signal-button-arrow { display:none; } }
@media (max-width: 440px) {
  .signal-exhibit { padding: 21px 16px 18px; }
  .signal-exhibit .signal-stage-heading h2 { font-size: 1.55rem; }
  .signal-canvas { margin: 8px -13px 14px; }
  .signal-scene-detail { display: none; }
  .signal-map .signal-zone-labels text { font-size: 20px; letter-spacing: 0; }
  .signal-map .signal-part text { font-size: 24px; }
  .signal-map .signal-part .signal-label-cn { font-size: 23px; }
  .signal-device-buttons { gap: 8px; }
  .signal-exhibit .signal-device-buttons button { padding: 11px 9px; gap: 6px; min-height: 79px; }
  .signal-button-copy strong { font-size: .875rem; }
  .signal-button-copy small { font-size: .6875rem; }
  .signal-button-arrow { display: none; }
  .signal-exhibit .signal-current { min-height: 0; margin-top: 15px; }
}
@media (prefers-reduced-motion: no-preference) {
  .signal-halo, .signal-device-body, .signal-information-path, .signal-radio-waves { transition: fill .2s ease, stroke .2s ease, opacity .2s ease; }
  .signal-device-buttons button { transition: border-color .2s ease, background-color .2s ease; }
}
@media (forced-colors: active) {
  .signal-device-body, .signal-information-path { stroke: CanvasText; }
  .signal-exhibit .signal-device-buttons button[aria-pressed="true"] { outline: 2px solid Highlight; outline-offset: -4px; }
}