canvas{
  display:block;
  vertical-align:bottom;
}

#particles-js{
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-image: url('');
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  z-index: 1;
}