.float{clear:both;}
#wrapper{width:960px;height:960px;background:#21E9E9;}
#header{width:960px;height:200px;background:#B39DDB;}
.content-area{background:#6EFFB7;}
#left-sidebar{width:320px;height:760px;background:#F06292;float:right;}
#post-content{width:320px;height:760px;background:#007DFE;float:right;}
#right-sidebar{width:320px;height:760px;background:#A2FE48;float:left;}