body {
	background: black;
	color: white;
	font-family: 'Karla', sans-serif;
	margin: 0;
}

.btn {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	cursor: pointer;
}

#play { 
	height: 128px;
}

.opaque {
	opacity: 0;
}