No Signal

<!-- No Signal — SMPTE-style color bars under a drifting static-noise
     overlay, with a captioned "NO SIGNAL" tag that dips briefly once
     per 4s cycle. Reduced motion: bars stay put, caption stays solid. -->
<div class="nuda-gd2-no-signal">
  <span class="nuda-gd2-no-signal__bars" aria-hidden="true"></span>
  <span class="nuda-gd2-no-signal__noise" aria-hidden="true"></span>
  <span class="nuda-gd2-no-signal__caption">NO SIGNAL</span>
</div>

.nuda-gd2-no-signal {
  position: relative;
  display: grid;
  place-items: center;
  width: 160px;
  aspect-ratio: 4/3;
  border-radius: 10px;
  overflow: hidden;
  background: #09090b;
}

.nuda-gd2-no-signal__bars {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,#c0c0c0 0 12.5%,#e4ff54 12.5% 25%,#00e5ff 25% 37.5%,#4be07a 37.5% 50%,#ff00d4 50% 62.5%,#ff3b3b 62.5% 75%,#3b5bff 75% 87.5%,#161616 87.5% 100%);
  opacity: .5;
}

.nuda-gd2-no-signal__noise {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg,rgba(255,255,255,.06) 0 1px,transparent 1px 2px),repeating-linear-gradient(90deg,rgba(0,0,0,.08) 0 1px,transparent 1px 3px);
  mix-blend-mode: overlay;
  animation: _nuda-gd2no-signal-noise 2s steps(4) infinite;
}

.nuda-gd2-no-signal__caption {
  position: relative;
  font: 900 .95rem/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing: .14em;
  color: #fafafa;
  background: rgba(9,9,11,.75);
  padding: .25rem .5rem;
  border-radius: 4px;
  animation: _nuda-gd2no-signal-caption 4s steps(1) infinite;
}

@keyframes _nuda-gd2no-signal-noise {
  0% {
    transform: translate(0,0);
  }
  25% {
    transform: translate(-1%,1%);
  }
  50% {
    transform: translate(1%,-1%);
  }
  75% {
    transform: translate(-1%,-1%);
  }
  100% {
    transform: translate(0,0);
  }
}

@keyframes _nuda-gd2no-signal-caption {
  0%,80%,100% {
    opacity: 1;
  }
  84% {
    opacity: .4;
  }
  88% {
    opacity: 1;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-gd2-no-signal__noise {
    animation: none;
  }
  .nuda-gd2-no-signal__caption {
    animation: none;
    opacity: 1;
  }
}