Can I change Tagline size? font size of menu tabs?

With your help, I was able to find a suitable template. However, I want to make the size of the header and tagline larger/wider. I am required by law to have certain info there, and it will not all fit and certainly isn’t fitting pretty as it is now (ie half of the phone number is on upper line of tagline, half of it is on a second line of the tag line.)

I imagine I might be able to make this problem go away by including it all in a “logo”, but I don’t design well, and it is not my forte at all.

It would be nice to be able to make the header and tagline extend more to the right (it is justified on the left).

Another issue I have is that the pages that are linked on my site using the Evolv theme have the tiniest of fonts (maybe a size 8) and the color is washed out/light and you can not see them hardly at all in the navigation. How can I fix this please? (I am heading off to fiddle with color themes, but it won’t change the fact that the size 8 font is just not as large as I would like.)

Any help is appreciated.

Thanks.