html {
	margin: 0;
	padding: 0;
	background-image: linear-gradient(#920dd8, #470668);
	height: 100%;
}

#container {
    position: absolute;
    top: 50%;
    left: 50%;
    max-width: 220px;
	min-width: 300px;
	transform: translate(-50%, -50%);
}​