Header height at Helix does not react on changing values

Hi team, first, SPpb and helix are excellent products so far - I really like it.
Just one issue keeps me busy the whole morning:
On a page where I try helix (kimsiebert.com/main) I have struggle to arrange the header height (especially on mobile) so the logo perfectly fits.
Of course I'm aware of the desktop/tablet/mobile height setting and son't use custom css so far.
When I check the code in the browser I can see that the height value is saved, but the header bar is still smaller.
I don't know where to change that so it looks proper. Can you please support me?
Thanks in advance!