.site-header{margin:auto}.site-header .top-row{display:none;width:100%;height:50px}.site-header .middle-row{width:100%;height:100%}.site-header .middle-row .left-block{text-align:left;float:left;width:30%;height:100%}.site-header .middle-row .right-block{float:right;text-align:right;width:70%;height:100%}.site-header .bottom-row{display:none;width:100%;height:50px}