jQuery Mobile. Button size on Footer

jQuery Mobile. Button size on Footer

Hi,
I'm new to jQuery Mobile but so far I can tell it's really good.

Unfortunately I got stuck with styles. 

1. All buttons look the same across the app except buttons on Footers. They're smaller, font is smaller. Is there a way to have the same size button as in Content part?

2. On Footer I need to have button at full width and to achieve that I need to put it in ul/li but then top/bottom border of the button is not visible. When it's elsewhere outside ul/li it's fine

Thanks in advance!