body {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	margin: 0 auto;
	margin-top: 50px;
	background-color: #f0f0f0;
	max-width: 700px;
}

canvas {
	border: 2px solid #1e1b1b;
	width: 90%;
}

button {
	color: #f0f0f0;
	background-color: #1e1b1b;
	border: 2px solid #1e1b1b;
	margin-bottom: 20px;
	padding: 10px 20px;
	font-size: 16px;
	transition: all 0.2s ease-in-out;
}

#showFreq {
	font-size: 20px;
	margin: 0;
	margin-top: 18px;
}

#showNote {
	font-size: 40px;
	margin: 0;
	margin-top: 18px;
}