* {
	margin: 0;
	padding: 0;
}

body {
	background: #e9e9e9;
}

.contenedor_img {
	width: 90%;
	margin: 10px auto;
}

.elemento {
	width: 290px;
	background: #fff;
	float: left;
	margin-right: 10px;
	margin-bottom: 10px;
	box-shadow: 0 1px 2px 0 rgba(0,0,0,0.22);
}