/* Perslis Defense · technology hero: fade the stage at top and bottom so falling sparks dissolve into the band. */
.d3-hero .d3-stage canvas {
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 9%, #000 86%, transparent 100%);
          mask-image: linear-gradient(to bottom, transparent 0, #000 9%, #000 86%, transparent 100%);
}