.center 
{
    text-align:center;
}

.center-page
{
    width: 300px;
    height: 300px;
    position: absolute;

    top:-40px;
    bottom:0;
    left:0;
    right:0;
    
    margin:auto;
}


.space-vert
{
     margin-top:20px;
}

.footer-pos
{
    width: auto;
    height: auto;
    position: absolute;

    top:600px;
    bottom:0;
    left:0;
    right:0;
    
    margin:auto;
 }
 
 
 
 body
 {
     padding-top :50px;
     }