Don't get too excited it's just Georgia. Unless you don't have that, and because I haven't specified a fallback, you will see some times new roman or something and that would explain your comment 

I might pick up development of this again as I am interested in improving it from a code perspective, it's a nice little pet project.

However I think that the main obstacle for people using it is the disconnect between writing the content locally and publishing the static site on the server.
Do you prefer writing blog posts and content locally (with carbon picking up changes and seamlessly publishing the webpages) or via the browser like WordPress does?

You might want to look at Jekyll also.  It seems to do a lot of what you were intending with this, so you might be able to get some ideas from that.  It requires ruby so you have a one-up in that fashion.

To see a simple example page, you can look at my github site.

Tyee I've updated the project so you can run it the way you want to.
https://github.com/svandragt/carbon/issues/17