JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
	<ul class="gallery">
		<li><a href=''><img id='sizeA' src='http://i.imgur.com/OLT53f5.jpg' style='max-width:160px'></a></li>

		<li><a href=''><img id='sizeA' src='http://i.imgur.com/OLT53f5.jpg' style='max-width:160px'></a></li>

		<li><a href=''><img id='sizeB' src='http://i.imgur.com/XuJoafB.jpg' style='max-width:160px'></a></li>

		<li><a href=''><img id='sizeA' src='http://i.imgur.com/OLT53f5.jpg' style='max-width:160px'></a></li>

		<li><a href=''><img id='sizeA' src='http://i.imgur.com/OLT53f5.jpg' style='max-width:160px'></a></li>

		<li><a href=''><img id='sizeC' src='http://i.imgur.com/FnVs97u.jpg' style='max-width:320px'></a></li>

		<li><a href=''><img id='sizeD' src='http://i.imgur.com/LUMUsh4.jpg' style='max-width:320px'></a></li>

	</ul>
</div>

CSS

a {
	text-decoration: none;
}

ul {
	margin: 0 auto;
	padding: 0;
	list-style: none;
}

body {
	background: #1c1c1c;
	width: 100%;
	margin: 0;
	border: 0;
	padding: 0;
}

.container {
	background: #101010;
	max-width: 960px;
	height: auto;
	margin: 0 auto;
	padding: 0;
}

.gallery {
	line-height: 0;
	-webkit-column-count: 3;
	-webkit-column-gap:   0px;
	-moz-column-count:    3;
	-moz-column-gap:      0px;
	column-count:         3;
	column-gap:           0px;


	}
	.gallery li {
		margin:  0;
		padding:  0;
		display: inline-block;
	}
	.gallery img {
		height: auto;
		margin:  0;
		padding:  0;
		width:  100%; 
	}
	#sizeA {
		margin-bottom: 0;
		margin-right: 0;
	}
	#sizeB {
		margin-bottom: 0;
		margin-right: 0;
	}
	#sizeC {
		margin-bottom: 0;
		margin-right: 0;
	}
	#sizeD {
		margin-bottom: 0;
		margin-right: 0;
	}
}

@media (max-width: 960px) {
	.gallery {
	-moz-column-count:    3;
	-webkit-column-count: 3;
	column-count:         3;
	}
}

@media (max-width: 640px) {
	.gallery {
	-moz-column-count:    2;
	-webkit-column-count: 2;
	column-count:         2;
	}
}

@media (max-width: 320px) {
	.gallery {
	-moz-column-count:    1;
	-webkit-column-count: 1;
	column-count:         1;
	}
}