How to style links

Having a bit of trouble styling links. I added style to the a tag but that applied the style to the site title and nav links, etc. I only want to add a particular style to links within the body of the page/post, etc. How would I best do that?
Thank you.

If they are text links within say a paragraph of text. Highlight the text and wrap in a span. Select the span and create a custom class for it.

That will work. But if I port everything to a CMS, how can I hand over content and other posts to a client? It would seem better to remove link styling from the nav and logo elements but am not sure how to do that.

Create a class called

p a

Maintain spacing to set a style for links inside a paragraph.