.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  background-color: rgba(188, 251, 108, 0.15);
  border-radius: 50%;
  width: var(--size);
  height: var(--size);
  top: var(--y);
  left: var(--x);
  animation: float 6s ease-in-out infinite;
  animation-delay: var(--delay);
}

@keyframes float {
  0%, 100% { 
    transform: translateY(0) translateX(0); 
  }
  50% { 
    transform: translateY(-20px) translateX(10px); 
  }
}