body {
	width: 200px;
}

button {
	height: 30px;
	width: 30px;
	outline: none;
	border-radius: 2px;
	cursor: pointer;
	border: 1px solid currentColor;
}

button:active {
	background-color: currentColor;
}

button.current {
	box-shadow: 0 0 0 2px white, 0 0 0 4px black;
}

h1,
h2 {
	font-size: 1rem;
	margin: 8px 0;
}

ul {
	margin: 0;
	padding: 0;
	list-style: none;
}

#preferences {
	background: none;
	padding: 0;
	margin: 8px 0;
	border: none;
	border-bottom: 1px solid currentColor;
}