* {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	font-family: sans-serif;
	font-weight: 300;
	background-color: #000;
	max-width: 600px;
	margin: 4% auto;
}

#resultDiv {
	display: none;
}

h1 {
	font-weight: 300;
	color: #fff;
	text-align: center;
	font-size: 5rem;
	margin-top: 20%;
}

#playAgain {
	width: 200px;
	cursor: pointer;
	background-color: #fff;
	border-radius: 5px;
	margin: 5% auto;
	font-size: 2rem;
	text-align: center;
	padding: 2%;
}

.board {
	width: 600px;
	height: 600px;
	margin: 0 auto;
}

.square {
	border: 1px solid #fff;
	float: left;
	width: 33.33%;
	height: 33.33%;
	display: inline-block;
	margin: 0;
	cursor: pointer;
}

.top {
	border-top: none;
}

.left {
	border-left: none;
}

.right {
	border-right: none;
}

.bottom {
	border-bottom: none;
}

.circle {
	background: url('../img/circle.png');
	background-repeat: no-repeat;
	height: 128px;
	width: 128px;
    margin: 15%;
    background-size: contain;
}

.cross {
	background-image: url('../img/cross.png');
	background-repeat: no-repeat;
	height: 128px;
	width: 128px;
    margin: 15%;
    background-size: contain;
}

@media (max-width: 540px), (max-height: 550px) {
	
	h1 {
		font-size: 2rem;
	}
	
	#playAgain {
		font-size: 1.2rem;
		width: 150px;
	}

	.board {
	    width: 300px;
	    height: 300px; 
	}

	.circle {
		height: 64px;
		width: 64px;
	}

	.cross {
		height: 64px;
		width: 64px;
	}
}