stylesheet help

[ken1]

Is there some place where I can get some help understanding how the stylesheet.css works.
I am not experienced in css and although I'm pretty good at figuring things out, I can't see where to
make the changes. Using firebug I can see the HTML code, but the stylesheet line numbers don't show me anything that I can see as a place to make canges and in the files I can't find any HTML coding. I am trying to move the logo over by 5px. I did find where to change the tag line in the stylesheet.css but I don't see anything related to the logo.png. My sandbox site is http://sandbox.byethost3.com/index.php?main_page=
I have gone to template support for help, but as of yet have heard nothing and I'm stuck.
Any help would be greatly appreciated.

[kobra]

In your stylesheet.css file find

#logo {margin-bottom:10px;}

Add your 5px either right or left like

#logo {
margin-bottom:10px;
margin-left:5px;
}