Here in this place let:
#header-bar {z-index:999;background:#03a9f4;padding:0!important;position:fixed;
That's a Category: this field is required."goes for the header-bar.
But if you do:
#header-bar {z-index:999;background:#03a9f4;padding:0!important;position:absolute;
That's okay.
Here are screenshots: