canvas {
	/* fallback for old browsers */
	background: -webkit-linear-gradient(to bottom, aqua, DodgerBlue, RoyalBlue, gold);  /* Chrome 10-25, Safari 5.1-6 */
	background: linear-gradient(to bottom, aqua, DodgerBlue, RoyalBlue, gold); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

#gameFilter {
	position: absolute;
	opacity: 0.7; 
	width: 600px; 
	height: 480px; 
	display: block;
	text-align: center;
	background-repeat: no-repeat;
	background-position: center;
}

#restartMessage {
	position: absolute;
	text-align:center;
	font: 2em sans-serif;
	font-weight: bold;
	color: DodgerBlue;
	display: block;
}

#canvasBoden {
	position: absolute;
}

#controlButtons {
	text-align:center;
	width: 260px;
}

#btnCenter {
	color: DodgerBlue;
	font-weight: bold;
	background-color: #b7b8f1;
	border: none;
	margin-top: 2px;
	margin-bottom: 2px;
	cursor: default;
}

#btnScore, #btnRecord {
	color: #000;
	font-weight: bold;
	background-color: #b7b8f1;
	border: none;
	cursor: default;
}

.btn {
	background-color: DodgerBlue;
	border: none;
	color: white;
	cursor: pointer;
}

/* Darker background on mouse-over */
.btn:hover {
	background-color: RoyalBlue;
}