body {
	background-color: gray;
}

#board {
	background-color: purple;
	width: 320px;
	height: 540px;
	position: fixed;
	top: 50%;
	left: 50%;
	margin-left: -160px;
	margin-top: -270px;
}

.card-button {
	width: 64px;
	height: 80px;
	border-radius: 15px;
	background-color: lime;
	padding: 7px 10px;
}

.face-up {
	background-color: white;
}

.matched {
	background-color: cyan;
}

.face {
	//background-color: cyan;
	visibility: hidden;
	width: 100%;
	height: 100%;
	text-align: center;
	vertical-align: center;
	padding: 32px 0;
}

.face-up .face {
	visibility: visible;
}

#score-box {
	text-align: center;
	font: larger bold;
	color: red;
}