.gallery_holder {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	grid-template-rows: 1fr;
	grid-column-gap: 1rem;
	grid-row-gap: 1rem;
	margin: 2rem 0;
	max-width: 100%;
}

.gallery_holder.gallery__col-1 {
	grid-template-columns: repeat(1, 1fr);
}
.gallery_holder.gallery__col-2 {
	grid-template-columns: repeat(2, 1fr);
}
.gallery_holder.gallery__col-3 {
	grid-template-columns: repeat(3, 1fr);
}
.gallery_holder.gallery__col-4 {
	grid-template-columns: repeat(4, 1fr);
}

.gallery_holder img {
	width: 100%;
	max-width: 100%;
	height: auto;
}

@media screen and (max-width: 768px) {
	.gallery_holder,
	.gallery_holder.gallery__col-2,
	.gallery_holder.gallery__col-3,
	.gallery_holder.gallery__col-4 {
		grid-template-columns: repeat(1, 1fr);
	}
}