#fireworks-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
}

.firework-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 0 6px white, 0 0 12px rgba(255, 255, 255, 0.8);
  animation: firework-fade-out 2s ease-out forwards;
  --vx: 0;
  --vy: 0;
}

@keyframes firework-fade-out {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(calc(var(--vx) * 100px), calc(var(--vy) * 100px)) scale(0);
    opacity: 0;
  }
}