html, body {
	background: #48505F;
	color: #eee;
	font-family: monospace;
	font-size: 16pt;
	text-align: center;
}

header {
	font-weight: bold;
	font-size: 14pt;
	padding: 6px;
	display: block;
}

#screen {
	white-space: nowrap;
	background: #111213;
	border-radius: 3px;
	padding: 6px;
	box-shadow: inset 0 0 5px black;
	display: inline-block;
}

#screen span {
	white-space: pre;
	cursor: pointer;
}

#screen span:hover {
	outline: 1px solid rgba(255,255,255,0.5);
}

#buttons {
	margin-top: 10px;
	white-space: nowrap;
}

button {
	margin: 0 3px;
	padding: 10px 0;
	width: 18%;
	max-width: 65px;
	cursor: pointer;
	font-weight: bold;
}