header{
	display: block;
	margin: 0 auto;
	width: 100%;
	text-align: center;
}
header h1{
	font-family: arial;
	font-size: 40px;
	font-weight: bold;
}

header #newganmebutton{
	display: block;
	margin: 20px auto;

	width: 100px;
	padding: 10px;
	background-color: #8f7a66;

	font-family: arial;
	color: white;

	border-radius: 10px;
	text-decoration: none;
}
header #newganmebutton:hover{
	background-color: #9f8b77;
}
header p{
	font-family: arial;
	font-size: 25px;
	margin: 20px auto;
}
#grid-container{
	width:460px;
	height: 460px;
	padding: 20px;

	margin: 10px auto;
	background-color: #bbada0;

	border-radius:10px;
	position: relative;
}
#score{
	vertical-align: middle;
}
.grid-cell{
	width: 100px;
	height: 100px;
	border-radius: 6px;
	background-color: #ccc0b3;

	position: absolute;
}
.number-cell{
	border-radius: 6px;

	font-family: arial;
	font-weight: bold;
	font-size: 60px;
	line-height: 100px;
	text-align: center;

	position: absolute;
}

.gameover{
	position: absolute;
	top: 0;
	right: 0;
	left: 0;
	bottom: 0;
	z-index: 9;

	background-color: rgba(200,200,200,.5);

	display: flex;
	justify-content: center;
	align-items: center;
}
.gameover-message{
	font-family: arial;
	font-weight: bold;
	font-size: 16px;
}
