.particle-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
}

.particle {
  position: absolute;
  bottom: -2px;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: rise var(--rise-duration) infinite ease-in;
}

@keyframes rise {
  0% {
    opacity: 0;
    transform: translateY(0) translateX(0);
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(-100vh) translateX(var(--translate-x));
  }
}