Required CSS Elements ?

I can’t seem to get my wordpress blog to fit in with the theme of the rest of my site. Is there a best way to approach this?

Are there required CSS elements that I could place into the CSS that goes with the rest of my page?

This:
http://www.chrystalsander.com/ciphernotes/

Should look similar to this:
http://www.chrystalsander.com

Thanks.