You should have something back. What I found:
Landing Page ID had a space in it.
Your external stylesheet link was "site/stylesheet.css", when the sheet was local to the html file.
The background image file was inside the html, when it really wants to be the background of the container in the CSS. I should have spotted that ages ago.
Remaining issues.
Massive images! Especially for the repeating background pattern. Google for "repeating background CSS". Very important for site load time. Also the edges of the repeating pattern don't seem to line up.
Vertical alignment of the central image.
Hope that helps you on your way.