Menu disappears on small screens On this site I implemented the Multi Level Push Menu. All works fine, but the menu disappears on small screens (tablet width and below). I use Bootstrap 3 und Drupal 7 in this project.

I already tried it with increasing the z-index on #menu, but it didn't worked.

I'm thankful for any suggestion.
According to this the problem, was that a div container pushed the menu away.

The old and wrong container was: 

&lt;div class="col-lg-12" id="content-container" style="
display: table-cell;"&gt;


It could be fixed by adding additional bootstrap classes:

&lt;div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="content-container"&gt;