CSS Sculptor does not create mobile ready designs.
The designs created by CSS Sculptor are formatted for desktop OS's.
They do not include separate CSS For use by mobile devices.
the CSS is trying to use a 960px width for the page.
it is trying to use 300px for the side bar, and 660px for the main content.
The IOS browser is zooming in on the side bar causing it to show as if the font is smaller.
view it on a desktop browser, though and it show correctly, because the layout is designed for desktop not mobile.