body { margin:0; padding:0 auto; }  #main { width:965px; margin-left:auto; margin-right:auto; }  .skyscraper #main,#tribeThread #main { width:780px; }  #tribe { position:relative; }  #tribeWrapper { position:relative; border-top:1px solid transparent; }  #col-a-wrapper { width:100%; }  #col-a,#col-b,#col-c,#footer { padding:16px; }  .two-column #col-a-wrapper { float:left; }  .two-column #col-a { margin-left:186px; }  .two-column #col-b { float:left; margin-left:-100%; width:170px; }  .two-column #col-c { display:none; }  .two-column-alt #col-a-wrapper { float:right; width:320px; }  .two-column-alt #col-b .contentContainer { margin-right:320px; }  .three-column #col-a-wrapper { float:none; }  .three-column #col-a { padding-left:0; padding-right:0; }  #ad1 { display:none; position:absolute; right:-190px; top:20px; width:160px; }  body.skyscraper { border-right:160px solid #C0B9B6; }  body.skyscraper #ad1 { display:block; margin-left:auto; }  #footer,.two-column-alt #col-c { clear:both; }  .three-column #col-b,.three-column #col-c { width:300px; }