.sprite-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
  }
  
  .sprite {
    position: absolute;
    width: 80px;
    opacity: 1;
    animation: floatY 3s ease-in-out infinite alternate;
  }
  
  @keyframes floatY {
    0% {
      transform: translateY(0px);
    }
    100% {
      transform: translateY(-30px);
    }
  }