.relief-ambient {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  user-select: none;
  overflow: hidden;
  opacity: var(--relief-light-intensity, .3);
}
.relief-ambient[hidden] { display: none; }
.relief-ambient .ambient-traveller { transform-box: view-box; transform-origin: 0 0; }
@media (prefers-reduced-motion: reduce), (forced-colors: active) {
  .relief-ambient { display: none; }
}