/* Cosmic nebula background behind waveform */
.local-waveform-container {
  position: relative;
  overflow: hidden;
}

.local-waveform-nebula {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;

  background: radial-gradient(
      circle at 30% 50%,
      rgba(0, 255, 255, 0.25),
      transparent 60%
    ),
    radial-gradient(
      circle at 70% 40%,
      rgba(180, 0, 255, 0.25),
      transparent 60%
    ),
    radial-gradient(
      circle at 50% 80%,
      rgba(255, 0, 180, 0.25),
      transparent 60%
    );

  filter: blur(40px);
  opacity: 0.55;
  animation: nebulaShift 18s infinite linear;
}

@keyframes nebulaShift {
  0% { transform: translateX(0px); }
  50% { transform: translateX(-40px); }
  100% { transform: translateX(0px); }
}