body
{
}
.logo
{
	top: 0; 
	left: 0; 
	width: 100%; 
	height: 100%;
    position: fixed; 
    display: table;
}
p 
{
	display: table-cell; 
	vertical-align: middle;
	text-align: center
}
.centre_logo
{
	display: block; 
	margin: 1em auto;
}