@charset "utf-8";
/* CSS Document */

.box{
	width:680px;
	margin:40px auto;
	display:flex;
	flex-wrap:wrap;
}
.winter{
	background-image: url("images/winter.jpg")
}
.spring{
	background-image:url("images/spring.jpg")
}
.summer{
	background-image:url("images/summer.jpg")
}
.fall{
	background-image:url("images/fall.jpg")
}
.season-box{
	width:330px;
	height:214px;
	border-radius:5px;
	display:block;
	margin:5px;
	background-size:100%;
	background-repeat: no-repeat;
	opacity: .5;
	transition: opacity 2s;
}
.season-box:hover{
	opacity: 1.0;
}