style.css

/* CSS Document */
@charset "utf-8";
#container, .row {
	width: 100%;
	float: left;
	color: #fff;
	font-size: 30px;
}
.wrap {
	max-width: 960px;
	margin: 0 auto;
}
.content {
	width: 70%;
	background: #2c8ac8;
}
.content, .sidebar {
	float: left;
	padding: 20px;
	min-height: 150px;
	margin: 20px 0px;
	box-sizing: border-box;
}
.sidebar {
	width: 30%;
	background: #e74c3c;
}
.item-01, .item-02, .item-03 {
	width: 33.33%;
	float: left;
	padding: 20px;
	box-sizing: border-box;
	min-height: 150px;
}
.item-01 {
	background: #9248b1;
}
.item-02 {
	background: #16a085;
}
.item-03 {
	background: #2c3e50;
}