body {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 16px;
    border: none;
}
body:before {
	content: "";
	display: block;
	position: fixed;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	z-index: -10;
    background-color: #ffffff;
	background-image: none;
	background-repeat: no-repeat;
	background-size: cover;
	background-position-x: center;
	background-position-y: center;
    opacity: calc(70 / 100);
    filter: alpha(opacity=70); /* For IE8 and earlier */
}
img.bkgpreview {
    background-color: #ffffff;
	background-image: none;
	background-repeat: no-repeat;
	background-size: cover;
	background-position-x: center;
	background-position-y: center;
    opacity: calc(70 / 100);
}