What are the default CSS styling of heading tags? (H1, h2, h3, h4, h5)

Question

In HTML, headings are denoted with (1,2,3,4,5,6) tag.

My question is regarding following HTML code:

Answer 1

Think a good practice is let h<1-6> keep their default styles. And then add a class to add additional styles. Just seems cleaner to me, and you are not hacking the "master styles." Pros and Cons I'm sure.

Hello CSS