.carousel-item {
    transition: transform 2s ease-in;
  }
  .carousel-fade .active.carousel-item-start,
  .carousel-fade .active.carousel-item-end {
    transition: opacity 0s 2s;
  }
 

  
.overlay-header{
    position: absolute;
    height: 100%;
    width: 100%;
    background: linear-gradient(138deg, rgba(0,0,0,0.4) 0%, rgba(255,255,255,0.1) 100%);
    z-index: 2;
    }
.neuronen-header{
    position: absolute;    
    z-index: 2;
    width: 120vw;
    opacity: 25%;
    }