.particleSmall, 
.particleMedium,
.particleLarge {
  position: relative; 
  overflow: hidden;   
}

.particleSmall > canvas, 
.particleMedium > canvas,
.particleLarge > canvas {
  position: absolute !important;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
  z-index: 0;
}

.particleSmall > *:not(canvas),
.particleMedium > *:not(canvas),
.particleLarge > *:not(canvas){
  position: relative;
  z-index: 1;
}