body {
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	background-image: url(./background.jpeg);
	background-size: cover;
}
.keys {
	display: flex;
	flex: 1;
	min-height: 100vh;
	align-items: center;
	justify-content: center;
}
.key {
	border: .1rem solid white;
	border-radius: .5rem;
	margin: 1rem;
	padding: 0.5rem 0 0;
	transition: all .07s ease;
	width: 7rem;
	height: 6rem;
	text-align: center;
	color: white;
	background: rgba(0,0,0,0.4);
	text-shadow: 0 0 .5rem black;
}
.playing {
	transform: scale(1.1);
	border-color: #ffc600;
	box-shadow: 0 0 1rem #ffc600;
}
kbd {
	display: block;
	font-size: 4rem;
}
.sound {
	font-size: 1rem;
	text-transform: uppercase;
	letter-spacing: .1rem;
	color: #ffc600;
}