ighid on "Margin and indiv post page issues"

Hi, I'm using seriously modified stylesheet with Kubrick on my blog http://uncglobalhealth.unc.edu. I am having issues with the margins on the individual post page. I'm already dealing with precious little real estate, width-wise, but how can I get the text to fill up more of the page? I can't figure out which style item to change.

Also, the background of single post pages won't change with the .page class, and remains white.

Finally, is there any way I can redefine the

style? I don't like the double side carrots (but I can live with them).

Thanks!