Trying to widen the center

[lilguppy]

as you can see www.apieceofthereef.com its VERY centered and I want the center to be widen slightly.
I know your supposed to go into stylesheet css but when I went into it there is no 'edit'
Can you put exactly where I need to go to find it so I can edit it to maybe 80 or 90%

Also how do I edit that !? returning customer thing I noticed that a few days ago

[lilguppy]

Ok #mainWrapper in my stylesheet css seemed to do the trick from moving it 750%-850% now I just need to work on the title

[stevesh]

Those characters probably resulted from improperly editing the greeting in index.php.

Also, it looks like you created your main page conent by copying and pasting from a WYSIWYG editor. Not usually a good idea, since those editors can add stuff that confuses Zencart. Better to use the built-in define pages editor.