JSFiddle - React, Tailwind, and code Playground

HTML

<div class="grid">
<div class="row">
<div class="c6"><img src="http://dummyimage.com/600x400/cccccc/cccccc.jpg" alt="-" /></div>
<div class="c6"><img src="http://dummyimage.com/600x400/cccccc/cccccc.jpg" alt="-" /></div>
</div>
</div>

CSS

img {
	border: 0
}
.row:before, .row:after, .clearfix:before, .clearfix:after {
	content: '';
	display: table
}
.row:after, .clearfix:after {
	clear: both
}
.row, .clearfix {
	zoom: 1
}
/* =Grid
-------------------------------------------------------------- */
* {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	-ms-box-sizing: border-box;
	box-sizing: border-box
}
.grid {
	max-width: 1200px;
	width: 100%;
	margin-top: 56px;
	margin-right: auto;
	margin-bottom: 56px;
	margin-left: auto;
}
img {
	max-width: 100%;
	height: auto;
	display: block;
	margin-left: auto;
	margin-right: auto
}
.wfull {
	width: 100%;
	max-width: 100%
}
.w320 {
	max-width: 320px
}
.w640 {
	max-width: 640px
}
.w960 {
	max-width: 960px
}
.row {
	width: 100%;
	margin-bottom: 10px
}
.row .row {
	width: auto;
	margin: 0 -20px
}
.c6 {
	width: 50%
}
.c6 {
	min-height: 1px;
	float: left;
	padding-left: 5px;
	padding-right: 5px;
	position: relative;
}

.end {
	float: right!important
}

/* =Media query for 960 Screens - sets nested grids to 100%
-------------------------------------------------------------- */
@media only screen and (max-width:960px) {
 .row .row .c6 {
	width: 100%;
	margin-bottom: 5px
}
.row .row > div:last-child {
	margin-bottom: 0 !important
}
}

/* =Media query for iPad and tablets
-------------------------------------------------------------- */
@media handheld, only screen and (max-width: 768px), only screen and (max-device-width: 768px) and (orientation:portrait) {
.row {
	margin-bottom: 0!important
}
.c6{
	width: 100%;
	margin-right: 0;
	margin-left: 0;
	margin-bottom: 5px;
	padding: 0;
}
.grid {
	max-width: 1200px;
	width: 100%;
	margin-top: 5px;
	margin-right: auto;
	margin-bottom: 0px;
	margin-left: auto;
	height: 100%;
}
}