* {
	box-sizing: border-box;
}
html,
body {
	margin: 0;
	height: 100%;
}
section {
	height: 100%;
	display: flex;
	flex-direction: column;
}
section #buttons {
	display: flex;
	flex-flow: wrap;
}
section div div {
	display: flex;
	flex-direction: column;
	margin: 10px;
}
section .text {
	flex: 1;
	border: 1px solid #000;
	margin: 10px;
}