ul.image-grid-holder {
	position: relative;
	margin: 0 auto;
	padding: 0;
	display: flex;
	justify-content: space-between;
	align-items: center;
	align-content: center;
}

ul.image-grid-holder li {
	list-style: none;
	text-align: center;
}

ul.image-grid-holder li img {
	display: block;
	margin: auto;
}

@media screen and (max-width: 900px) {
	ul.image-grid-holder {
		flex-wrap: wrap;
		justify-content: center;
	}

	ul.image-grid-holder li {
		width: 33.33%;
		margin-top: 0;
		margin-bottom: 0;
	}

	ul.image-grid-holder li img {
		margin: 5px auto;
		width: 90%;
	}
}

@media screen and (max-width: 768px) {
	ul.image-grid-holder li {
		width: 50%;
	}
}