body {
    margin: 0;
    background: #000;
}
  
#dna {
    position: absolute;
    top: -250px;
    left: 0;
    width: 100%;
    z-index: -1;
}
  
.parallax-container {
    min-height: 70vh;
}
  
#astronaut {
    position: absolute; 
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
    z-index: -2;
}