body {
  background-color: #000000;
  /* BACKGROUND IMAGE */
  /*background-image: url('bg.jpg');*/
  background-repeat:no-repeat;
  background-position:center 0;
 background-attachment:fixed;
}
@media screen and (max-width: 768px) {
  .navbar {
    display: none;
  }

  .navbar.mobile-open {
    display: block;
  }
}