Hi Rob! Yes, it has been a while. 
I'm happy to say that this time around, instead of simply asking for the codework, I'm making the journey of learning CSS myself.
Touche on the background. I had figured the sections were divs with interesting colors and BGs, but you are correct, one long repeating tile. So I suppose you could achieve the same effect by setting the background in pagelines similarly, and then telling all section backgrounds to be transparent? But then you have to fool with lining up the page BG with the section elements if my brain serves me correctly. That is one approach.
However I was kind of hoping I could use CSS to individually play with the BGs of each Pagelines Section. For instance I tried to do something like
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My above code is probably all sorts of wrong, but I tried many permutations and couldn't get it going. I would just love to be able to use each section as a means of dividing up the page with different colors and patterns. This is another decent example:
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This one uses divs right? I want to do that. But also I need the effects I place on them to stretch across the screen...but perhaps my other questions are enough for now.