nav[data-toggle="toc"] {
  top: 42px;
}

/* small screens */
@media (max-width: 768px) {
  /* override stickyness so that the navigation does not follow scrolling */
  nav[data-toggle="toc"] {
    margin-bottom: 42px;
    position: static;
  }

  /* PICK ONE */
  /* don't expand nested items, which pushes down the rest of the page when navigating */
  nav[data-toggle="toc"] .nav .active .nav {
    display: none;
  }
  /* alternatively, if you *do* want the second-level navigation to be shown (as seen on this page on mobile), use this */
  /*
  nav[data-toggle='toc'] .nav .nav {
    display: block;
  }
  */
}