.bg {
    /* The image used */
    background-image: url("/assets/404.jpg");
  
    /* Full height */
    height: 100vh;
    width: 100wh;
  
    /* Center and scale the image nicely */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
  }


  #home_btn_404 {
    position:absolute; 
    margin-left:-50px;
    left:50%;
    bottom:50px;
  }