.header{
height:50px;
background-color:black;
color:white;
margin:0px;
padding:0px;

}
.cerf{
background-color:black;
color:white;
}
.vstavka{
height:50px;
color:white;
margin:0px;
padding:10px;
color:wihite;
background-color:red;
right:10px;
float: 50px;
position:absolute;
 }