html, body {
	margin: 0;
	padding: 0;
	height: 100%;
	line-height: 2em;
	font-family: Arial;
	font-size: 1.2em;
}

#startScreen, #endScreen {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding-top: 10%;
}

#endScreen {
	display: none;
}

label, button {
	font-size: 1.1em;
	width: 300px;
}