html, body {
	width: 100%;
	height: 100%;
	padding: 0;
	margin: 0;
}

#container {
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
}

.letters {
	font-size: 2em;
}

.letters span {
	padding: 10px;
}