html {
	height: 100%;
	margin: 0 auto;
	padding: 0;
	display: table;
}
body {
	min-height: 100%;
	margin: 0 auto;
	padding: 0;
	display: table-cell;
	vertical-align: middle;
    background-image: none;
}
.form-signin {
    max-width: 550px;
	min-width: 550px;
    padding: 15px;
}