/* Full CSS with fixes added at the end */
@import url(http://fonts.googleapis.com/css?family=Open+Sans);
/* (your CSS content here - omitted in this snippet to save space) */
/* FIXES */
@media (max-width: 768px) {
  #cssmenu ul.open {
    display: block !important;
  }
  #cssmenu #menu-button {
    position: relative;
  }
}