.float{clear:both;}
#wrapper{width:950px;height:950px;background:#21E9E9;}
#header{width:100%;height:200px;background:#B39DDB;}
.content-area{background:#8BC34A;}
#left-sidebar{width:200px;height:750px;background:#F06292;float:left;}
#post-content{width:700px;height:750px;background:#8BC34A;float:right;}