.photo_gallery-list__item {
	display: block;
	height: 200px;
	position: relative;
	margin-bottom: 30px;
}

.photo_gallery-list__item:after {
	content: ' ';
	display: block;
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(0, 0, 0, .3);
	z-index: 1;
	opacity: 1;
	transition: .2s;
}

.photo_gallery-list__item:hover:after {
	opacity: 0;
}

.photo_gallery-list__item > img {
	max-width: 100%;
	max-height: 100%;
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: center;
}

@media screen and (max-width: 637px) {
	.photo_gallery-list__item {
		height:  150px;
	}