#gallery {
	box-sizing: border-box;
}
#gallery ul {
	display: -webkit-flex;
	display: flex;
	flex-wrap: wrap;
	-webkit-justify-content: flex-start;
	justify-content: flex-start;
}
#gallery ul li {
	position: relative;
	width: 50%;
	height: auto;
	padding: 10px;
	box-sizing: border-box;
}
#gallery ul li .waku {
	position: relative;
	width: 100%;
	padding-top: 100%;
	overflow: hidden;
	margin: 0 auto;
}
#gallery ul li .waku:hover {
	opacity: .8;
	filter: alpha(opacity=80);
}
#gallery ul li .waku img {
	position: absolute;
	top: 50%;
	left: 50%;
	-webkit-transform: translate(-50%, -50%);
	-ms-transform: translate(-50%, -50%);
	transform: translate(-50%, -50%);
	max-width: 150%;
	max-height: 150%;
}

@media screen and (min-width: 600px) {

	#gallery ul li {
		width: 25%;
		padding: 16px;
	}

}

@media screen and (min-width: 1000px) {

	.main_inner#gallery {
		width: 82%;
	}

}