Could you clarify which block of code is working and which isn't?
Try comparing the selectors in each blog. For example, the first one has styles for
which means they will apply to the body tag only if you have
in the HTML. In the second block, the selector is just "body", meaning that it will apply
to the body tag regardless of its classes.
If you compare the selectors as well as the classes used in the HTML itself, that might explain the results you're getting.