wrap an outline of a box around the collapsible divs

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Hi I'm trying to wrap an outline of a box around the collapsible divs under General Torrents. (around Mininova, Demonoid, The Pirate Bay, Btjunkie)

http://www.plentyoftorrents.com/010/index.php Any ideas on how I can make the layout of these collapsible divs look nicer? I figured CSS might be the best way to change it but I don't know where to start.

 

Heres the .css

http://www.plentyoftorrents.com/010/style.css

 

Thanks for any help.