Topic: CSS on code
The blue color on every 2nd code sample is a bit harsh in my opinion.
class Foo < Bar
do_this_please if is_allowed_to_do_this?
def initialize(foo, bar, *bazarz)
Makes the code a bit harsher to read. I suggest this color: #ECF5F9
That's the same color as the one used now, but with 50% opacity on top of a white background. Looks a bit zmoother!