Module:Flex columns/styles.css

.flex-columns-container {
	clear:both;
	width:100%;
	display: flex;
}
.flex-columns-container > .flex-columns-column {
	float: left;
	width: 50%;
	flex: 1 1 auto;
	display: flex;
	flex-direction: column;
}
.flex-columns-container > .flex-columns-column > div {
	flex: 1 0 auto;
}