header{
     
     text-align: center; 
}
body
{
    background-color: Gray;
/*background-color: #2F3035; 
 background-image: url(logo/saderev1.jpg); */ 
background-size: cover;
background-repeat: no-repeat;
background-position: center;
     text-align: center; 
}
.container{
    margin-left: auto;
    margin-right: auto;
    width: 1024px;
}