2048.css

 #gridPanel{
		width:480px;
		height:480px;
		margin:0 auto;
		background-color:#bbada0;
		border-radius:10px;
		position:relative;
}
.grid,.cell{
		width:100px;
		height:100px;
		/*margin:16px;*/
		border-radius:6px;
}
.grid{
		background:#ccc0b3;
		float:left;
		margin:16px 0 0 16px;
}
.cell{
		position:absolute;
		text-align:center;
		line-height:100px;
		font-size:50px;
		font-weight:800;
		color:#fff;
}

[id^="c0"]{top:16px;}
[id^="c1"]{top:132px;}
[id^="c2"]{top:248px;}
[id^="c3"]{top:364px;}
[id^="c4"]{top:480px;}
[id^="c5"]{top:596px;}
[id^="c6"]{top:712px;}
[id^="c7"]{top:828px;}


[id$="0"]{left:16px;}
[id$="1"]{left:132px;}
[id$="2"]{left:248px;}
[id$="3"]{left:364px;}
[id$="4"]{left:480px;}
[id$="5"]{left:596px;}
[id$="6"]{left:712px;}
[id$="7"]{left:828px;}


.n2{background-color:#eee3da}
.n4{background-color:#ede0c8}
.n8{background-color:#f2b179}
.n16{background-color:#f59563}
.n32{background-color:#f67c5f}
.n64{background-color:#f65e3b}
.n128{background-color:#edcf72}
.n256{background-color:#edcc61}
.n512{background-color:#9c0}
.n1024{background-color:#33b5e5}
.n2048{background-color:#09c}
.n4096{background-color:#a6c}
.n8192{background-color:#93c}
.n2,.n4{color:#776e65}
.n1024,.n2048,.n4096,.n8192{font-size:40px}

p{
	width:480px;
	margin:0 auto;
	padding-top:15px;
	font-size:40px; font-weight:bold;
	font-family:Arial;
}
#gameOver{
	/*display:none;*/
	position:absolute;
	top:0;
	left:0;
	width:100%;
	height:100%;

}
#gameOver>div{
	width:100%;
	height:100%;
	background:#555;
	opacity:0.5;

}
#gameOver>p{
	position:absolute;
	top:50%;
	left:50%;
	width:300px;
	height:200px;
	margin-top:-100px;
	margin-left:-150px;
	border:1px solid #edcf72;
	border-radius:10px;
	line-height:1.5em;
	background:#fff;
	text-align:center;
}
#gameOver .btn{
	cursor:pointer;
	border-radius:6px;
	padding:10px;
	background:#9f8d77;
	color:#fff;
}