body{ margin:0; padding:0; }
#wrapper{ margin:0 auto; width:960px; }
div.row{ clear:both; }
div.column{ float:left; }
div.narrow{ width:250px; }
div.medium{ width:610px; }
div.wide{ width:700px; }
div.mt{ margin-top:10px; }
div.mr{ margin-right:10px; }
div.mb{ margin-bottom:10px; }
div.ml{ margin-left:10px; }
div.centered{ margin:0 auto; width:960px; }
body.inner div.narrow{ width:160px; }
body.inner div.wide{ width:785px; }