Ok…another thing or two:
Your ‘page title’ is in a span instead of an h1…? That’s just bad for SEO.
If you want the same effect just remove the span and put it in an h1 with the same class of ‘sign**_a_**ture’. You might have to tweak but from a ranking POV it would be so much better.
Also, you might want to think about centering the title/h1 and navbar once the viewport size warrants it.