body{
    margin: 0;
    padding: 0;
    height: 100vh;
    
}
#particles-js{
  width: 100%;
  height: 100%;
  background-color: ;
  background-image: url('');
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
}

canvas {
   bottom: 0;
    position: fixed;
    z-index: -1;
}