A nice layout. For fun I attempted to actually print (to PDF) and boy was that messed up badly! Guessing that's not the type of "print" you had in mind. :)
go into the print settings for pdf and set the margins to "none" - that fixed it here. but my workflow was singlefile extension to save as a single html file, then i opened that in another browser and used that to print to pdf - just to make sure i wasn't doing a "but it worked at my house" sort of claim!