.fireworks {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;

  /* activate the following for fixed positioning */
  /*position: fixed;*/
  /*overflow: hidden;*/
}

.rocket-trail {
  position: absolute;
  left: var(--trailX);
  top: var(--trailStartY);
  width: 4px;

  /* activate the following for rocket trail */
  height: 60px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0));
  filter: blur(2px);

  /* activate the following for rocket trail as a point */
  /*height: 4px;*/
  /*background: white;*/
  /*border-radius: 50%;
  box-shadow: 0 0 8px 2px white;*/

  animation: rocket-trail-animation 1s linear forwards;
}

@keyframes rocket-trail-animation {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(calc(var(--trailEndY) - var(--trailStartY)));
    opacity: 0;
  }
}

/* Animation for the particles */
@keyframes fireworkParticle {
  0% {
    opacity: 1;
    transform: translate(0, 0);
  }
  100% {
    opacity: 0;
    transform: translate(var(--x), var(--y));
  }
}

.firework {
  position: absolute;
  width: 5px;
  height: 5px;
  background: white;
  border-radius: 50%;
  animation: fireworkParticle 1.5s ease-out forwards;
  filter: blur(1px);
}