Navigation Header Bar - 64px empty white space issue

Hi, I have problem with Navigation Header bar.
I go to Navigation menu, then set Navigation header bar as disabled. But after that I have empty white space on bottom, that’s 64px pixels and issue is in css because in source codes I have on every page this:

.jss22 {
    width: 100%;
    **min-height: calc(100vh - 64px);**

How I can change this css manually?

Hi, unfortunately there’s no way to directly edit the CSS. Could you report this as a bug in the Tracker: