header{
	/*display: block;*/
	margin: 0 auto;
	width: 100%;
	text-align: center;
}
h1{
	font-family: Arial;
	font-size: 40px;
	font-weight: bold;
}
header .newgamebutton{
	display: block;
	margin: 10px auto;
	width: 100px;
	padding: 10px;
	background-color: #8f7a66;
	font-family: Arial;
	color: white;
	border-radius: 10px;
	text-decoration: none;
}
header .newgamebutton:hover{
	background-color: #9f8b77;
}
header p{
	font-family: Arial;
	font-size: 25px;
	margin: 10px auto;
}

.grid-container{
	width: 460px;
	height: 460px;
	padding: 20px;
	margin: 20px auto;
	background-color: #bbada0;
	border-radius: 10px;
	position: relative;
}
.grid-container .grid-cell{
	width: 100px;
	height: 100px;
	border-radius: 6px;
	background-color: #ccc0b3;
	position: absolute;
}
.number-cell{
	border-radius: 6px;
	font-family: Arial;
	font-size: 60px;
	line-height: 100px;
	text-align: center;
	position: absolute;
}