.article:nth-child(even){
	background-color: #ececec;
}

.article:nth-child(even) img{
	float: left;
	margin: 2rem 2rem 2rem 0;
}

@media(max-width: 640px) {
	.article img{
		max-width: 100%;
		margin: 2rem 0;
	}
}