#column_wrapper {
  width: 100%;
  max-width:900px;
  margin: 0 auto;
}

	#column_main {
    clear: both;
    width: 100%;
		max-width: 648px;
		margin-right: 222px;
	}
	#column_main .content {
		padding: 0px 10px 0px 12px;
		
	}
	#column_right {
		min-width: 246px;
		background-color: #efefef;
	}
	#column_right .content {
		padding: 0px 10px;
	}
  @media min-width: 900px {
    #column_right {
      float: right;
    }    
  }