.ctx {
	padding:10px;
	border:1px solid #000;
	width:500px;
	height:300px;
	margin:10px;
	vertical-align: top;
	display: inline-block;
}
.ctx-img {
	border: 1px solid #000;
	max-width:450px;
	max-height:250px;
}

.ctx-img:hover {
	border: 3px solid #000;
	max-width:455px;
	max-height:255px;
}