html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

img {
    padding: 0;
    display: block;
    margin: 0 auto;
    min-width: 65rem;
    max-width: 100%;
}
#demo {
	font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
	font-size: 14px;
	line-height: 1.42857;
	width:100%;
	height:auto;
	text-align:center;
	display:inline-block;
	position:relative;
	background-color: rgba(0, 0, 0, 0.8);
	color:#fff;
	padding:2px
}