.trail-image {
  position: fixed;
  z-index: -9999;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: none;
  width: auto;
  height: auto;
  max-width: 150px;
  max-height: 150px;
  transition: opacity 0.25s cubic-bezier(.7,1.7,.7,1), transform 0.25s cubic-bezier(.7,1.7,.7,1);
  opacity: 1;
}

.trail-image.is-fading {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0);
}