I don't mean styling for the sake of looking stylish, I mean styling for readability. Line spacing, page width (reading text that takes up full width of a 27" is not nice), section grouping/separation, title size, use of colour (e.g. for titles to increase visibility of section grouping, for background/font to decrease stark contrast), sans-serif font (greater readability on a screen vs on paper), etc are all valid design considerations.