rastersysteme/flexbox.css

## flexbox.css
/**
 * Flexbox Equal Height Testcase
 *
 */


/**
 * ---------------------------------------------------------------------------------------------------- #
 *
 * Browser Reset
 *
 */

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
font,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
	margin: 0;
	border: 0;
	padding: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
menu,
nav,
section,
summary {
	display: block;
}

audio,
canvas,
progress,
video {
	display: inline-block;
	vertical-align: baseline;
}

audio:not([controls]) {
	display: none;
	height: 0;
}

body {
	line-height: 1;
}

blockquote,
q {
	quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
	content: none;
}

img {
	border: 0;
}

ol,
ul {
	list-style: none;
}

pre {
	overflow: auto;
}

svg:not(:root) {
	overflow: hidden;
}

table {
	border-collapse: collapse;
	border-spacing: 0;
}


/**
 * ---------------------------------------------------------------------------------------------------- #
 *
 * Basic Formattings
 *
 */

html {
	box-sizing: border-box;
}

*,
*:before,
*:after {
	box-sizing: inherit;
}

body {
	font-family: helvetica, arial, sans-serif;
	font-size: 1em; /* 16px */
	line-height: 1.375em; /* 22px */
	text-align: left;
	text-rendering: optimizeLegibility;
	-webkit-text-size-adjust: 100%;
	-ms-text-size-adjust: 100%;
	color: #333;
	background-color: #fff;
}


/**
 * ---------------------------------------------------------------------------------------------------- #
 *
 * Page
 *
 */

.b-page {
	position: relative;
	max-width: 1280px;
	margin: 0 auto;
}


/**
 * ---------------------------------------------------------------------------------------------------- #
 *
 * Grid
 *
 */

.b-grid {
	display: -webkit-flex;
	display: -ms-flexbox;
	display: flex;
}

.b-grid.is-level-1 {
	-webkit-flex-direction: row;
	-ms-flex-direction: row;
	flex-direction: row;
}

.b-grid.is-level-2 {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
}

.b-grid .cell {
	display: -webkit-flex;
	display: flex;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
}

.b-grid.is-level-1 > .cell {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	padding: 20px;
}

.b-grid.is-level-1 > .cell:nth-child(1) {
	background-color: #eee;
}

.b-grid.is-level-1 > .cell:nth-child(2) {
	background-color: #ccc;
}

.b-grid.is-level-2 > .cell:nth-child(1) {
	min-height: 44px;
	margin-bottom: 22px;
}

.b-grid.is-level-2 > .cell:nth-child(2) {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	padding: 20px;
	background-color: #aaa;
}

.b-grid .list {
	list-style: disc inside;
}

## flexbox.html
<!DOCTYPE html>
<html lang="de">
	<head>
		<meta charset="utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=IE7" />

		<title>Flexbox Equal Height Testcase</title>

		<meta name="description" content="" />
		<meta name="keywords" content="" />
		<meta name="author" content="" />
		<meta name="viewport" content="width=device-width, initial-scale=1" />

		<link href="flexbox.css" rel="stylesheet" type="text/css" />
	</head>

	<body>
		<div class="b-page">
			<div class="b-grid is-level-1">
				<div class="cell">
					<div class="b-grid is-level-2">
						<div class="cell">
							<h2 class="title">headline headline headline headline headline headline headline headline headline headline headline headline headline headline</h2>
						</div>

						<div class="cell">
							<ul class="list">
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
							</ul>
						</div>
					</div>
				</div>

				<div class="cell">
					<div class="b-grid is-level-2">
						<div class="cell">
							<h2 class="title">headline</h2>
						</div>

						<div class="cell">
							<ul class="list">
								<li>listitem</li>
								<li>listitem</li>
								<li>listitem</li>
							</ul>
						</div>
					</div>
				</div>
			</div>
		</div>
	</body>
</html>
	/**
	* Flexbox Equal Height Testcase
	*
	*/


	/**
	* ---------------------------------------------------------------------------------------------------- #
	*
	* Browser Reset
	*
	*/

	html,
	body,
	div,
	span,
	applet,
	object,
	iframe,
	h1,
	h2,
	h3,
	h4,
	h5,
	h6,
	p,
	blockquote,
	pre,
	a,
	abbr,
	acronym,
	address,
	big,
	cite,
	code,
	del,
	dfn,
	em,
	font,
	img,
	ins,
	kbd,
	q,
	s,
	samp,
	small,
	strike,
	strong,
	sub,
	sup,
	tt,
	var,
	b,
	u,
	i,
	center,
	dl,
	dt,
	dd,
	ol,
	ul,
	li,
	fieldset,
	form,
	label,
	legend,
	table,
	caption,
	tbody,
	tfoot,
	thead,
	tr,
	th,
	td,
	article,
	aside,
	canvas,
	details,
	embed,
	figure,
	figcaption,
	footer,
	header,
	hgroup,
	menu,
	nav,
	output,
	ruby,
	section,
	summary,
	time,
	mark,
	audio,
	video {
	margin: 0;
	border: 0;
	padding: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
	}

	article,
	aside,
	details,
	figcaption,
	figure,
	footer,
	header,
	main,
	menu,
	nav,
	section,
	summary {
	display: block;
	}

	audio,
	canvas,
	progress,
	video {
	display: inline-block;
	vertical-align: baseline;
	}

	audio:not([controls]) {
	display: none;
	height: 0;
	}

	body {
	line-height: 1;
	}

	blockquote,
	q {
	quotes: none;
	}

	blockquote:before,
	blockquote:after,
	q:before,
	q:after {
	content: none;
	}

	img {
	border: 0;
	}

	ol,
	ul {
	list-style: none;
	}

	pre {
	overflow: auto;
	}

	svg:not(:root) {
	overflow: hidden;
	}

	table {
	border-collapse: collapse;
	border-spacing: 0;
	}


	/**
	* ---------------------------------------------------------------------------------------------------- #
	*
	* Basic Formattings
	*
	*/

	html {
	box-sizing: border-box;
	}

	*,
	*:before,
	*:after {
	box-sizing: inherit;
	}

	body {
	font-family: helvetica, arial, sans-serif;
	font-size: 1em; /* 16px */
	line-height: 1.375em; /* 22px */
	text-align: left;
	text-rendering: optimizeLegibility;
	-webkit-text-size-adjust: 100%;
	-ms-text-size-adjust: 100%;
	color: #333;
	background-color: #fff;
	}


	/**
	* ---------------------------------------------------------------------------------------------------- #
	*
	* Page
	*
	*/

	.b-page {
	position: relative;
	max-width: 1280px;
	margin: 0 auto;
	}


	/**
	* ---------------------------------------------------------------------------------------------------- #
	*
	* Grid
	*
	*/

	.b-grid {
	display: -webkit-flex;
	display: -ms-flexbox;
	display: flex;
	}

	.b-grid.is-level-1 {
	-webkit-flex-direction: row;
	-ms-flex-direction: row;
	flex-direction: row;
	}

	.b-grid.is-level-2 {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
	}

	.b-grid .cell {
	display: -webkit-flex;
	display: flex;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
	}

	.b-grid.is-level-1 > .cell {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	padding: 20px;
	}

	.b-grid.is-level-1 > .cell:nth-child(1) {
	background-color: #eee;
	}

	.b-grid.is-level-1 > .cell:nth-child(2) {
	background-color: #ccc;
	}

	.b-grid.is-level-2 > .cell:nth-child(1) {
	min-height: 44px;
	margin-bottom: 22px;
	}

	.b-grid.is-level-2 > .cell:nth-child(2) {
	-webkit-flex: 1;
	-ms-flex: 1;
	flex: 1;
	padding: 20px;
	background-color: #aaa;
	}

	.b-grid .list {
	list-style: disc inside;
	}
	<!DOCTYPE html>
	<html lang="de">
	<head>
	<meta charset="utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=IE7" />

	<title>Flexbox Equal Height Testcase</title>

	<meta name="description" content="" />
	<meta name="keywords" content="" />
	<meta name="author" content="" />
	<meta name="viewport" content="width=device-width, initial-scale=1" />

	<link href="flexbox.css" rel="stylesheet" type="text/css" />
	</head>

	<body>
	<div class="b-page">
	<div class="b-grid is-level-1">
	<div class="cell">
	<div class="b-grid is-level-2">
	<div class="cell">
	<h2 class="title">headline headline headline headline headline headline headline headline headline headline headline headline headline headline</h2>
	</div>

	<div class="cell">
	<ul class="list">
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	</ul>
	</div>
	</div>
	</div>

	<div class="cell">
	<div class="b-grid is-level-2">
	<div class="cell">
	<h2 class="title">headline</h2>
	</div>

	<div class="cell">
	<ul class="list">
	<li>listitem</li>
	<li>listitem</li>
	<li>listitem</li>
	</ul>
	</div>
	</div>
	</div>
	</div>
	</div>
	</body>
	</html>