#wpadminbar {
  position:fixed ! important;
  top:auto;
  bottom:0;
}
#wpadminbar .menupop .ab-sub-wrapper, #wpadminbar .shortlink-input { bottom:32px; }
body.admin-bar { padding-bottom:32px; }
@media screen and (max-width: 782px) {
  #wpadminbar .menupop .ab-sub-wrapper, #wpadminbar .shortlink-input { bottom:46px; }
  body.admin-bar { padding-bottom:46px; }
}