body {
	background: green url("leaves.jpg") center no-repeat fixed;
	background-size: cover;
}
#root {
    text-align: center;
    color: black;
    font-family: "Helvetica";
    font-size: medium;
    font-weight: bold;
	background-color: rgba(192,255,32,.4);
	position: absolute;
	top: 50%;
	left: 50%;
	margin-right: -50%;
	transform: translate(-50%, -50%);
	border: 3px solid green; 
	padding: 35px
}