this content div is floated left, but appears where we want it, butting up against the 200px padding
it has the light green background
the "container" div holds heading, main, content, and footer
the left nav div is absolutely positioned over the 200 px padding that main has. Main contains the top nav div, and content div
A Heading
more content in content div
much more content in content div
when content is greater than the content on left side, we have the white background of main div showing through, (the padding of main)
