Neoclassical/Wordpress theme tweak help needed

[thebutler]

Folks, I like the simple look of the Neoclassical Wordpress theme. (theme still installed on my zcbl.com website).

I know you can tweak things with the custom css file.

I'm trying to make the sidebars slightly small (140 vs 190) but I can't seem to make those lines that divid the sidebars and the body/content to move when I made the sidebars smaller.

Any ideas on what to add to the custom css file.

Thanks
db