Auto-creating links in CSS definition

I’m not much of a CSS guru, but is it possible to not only set a style in CSS, but also make an item a link, or at least define the href parameter in <a> tags?

For instance, this will have the formatting AND the newest link to the site:
<span class=“mysite”>Visit my site!</span>

I would appreciate a simple “not possible” if not possible rather than being ignored. :wink: