test.css

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

.content {
	min-height: 100%;
	position: relative;
	overflow: auto;
	z-index: 0; 
}

.background {
	position: absolute;
	z-index: -1;
	top: 0;
	bottom: 0;
	margin: 0;
	padding: 0;
}

.top_block {
	width: 100%;
	display: block; 
}

.bottom_block {
	position: absolute;
	width: 100%;
	display: block;
	bottom: 0; 
}

.left_block {
	display: block;
	float: left; 
}

.right_block {
	display: block;
	float: right; 
}

.center_block {
	display: block;
	width: auto; 
}

.background.block_1 {
	height: auto !important;
	padding-bottom: 0;
	left: 0;
	width: 80%;
	background-color: #9999ff; 
	margin-left: 20%;
	
}

.block_1 {
	height: auto;
	width: 20%;
	min-width:300px;
	padding-bottom: 0px;
	background-color: #ff4732;
}