Next/Previous post link in the bottom of posts

Hi,

I have two questions about the NEXT/PREVIOUS POST link in the bottom of posts:

– Is there a way to set those links to only link to posts of the same category of the current post? They seem to point to the NEXT/PREVIOUS published post by date/time, regardless of its category.

– Is there a way to change the appearance of the link, as it is too similar and too close to other elements of the post (and the footer)?

Thanks in advance