.logo_left {
	float: left;	
}
.logo_right {
	float: right;	
}

#wrapper1 {
 position: absolute;
  left: 0;
  top: 0;
  right: 0;
  z-index: 1;
}

#wrapper4 {
 position:relative;
  z-index: 0;
  height: 100vh;
}

#row4 {
 position:relative;
  z-index: 0;
  padding-top: 25%;
}