body {
	margin: 0;
	padding: 0;
	font-family: 'source-sans-pro', Helvetica, Arial, sans-serif;
	font-size: 14px;
}
.demo_wrapper {
	width: 1000px;
	margin: 0 auto;
    height: auto;
}

.demo_block {
	width: 100%;
}