Remove custom background

Hi! I would like to remove the border/ shadow/ Custom Background on this site : http://www.fitumzug.at/ (Catch Kathmandu). I know how to change the custom background color. The problem is that the footer is shorter than the whole site. I want the footer like it is on this site http://travelintense.com/  I would be very happy, if you send me the CSS code for this problem. I tried this CSS  .site { box-shadow: none; } , but it didn´t work.  Thank you so much for providing these themes! // ein