body {
	-moz-user-select: none;
	-ms-user-select: none;
	-webkit-user-select: none;
}

div {
	-webkit-tap-highlight-color:rgba(0,0,0,0);
}

.calculator {
	margin: 0 auto;
	margin-top: 100px;
	height: 445px;
	width: 260px;
	background: #e4e3e2;
	padding: 5px;
	position: relative;
	border-radius: 5px;
	box-shadow: 3px 5px 5px  #717170;
}

header {
	font: 12px;
	text-align: center;
	margin-top: -2px;
	margin-bottom: 3px;
	color: #fff;
	opacity: .5;
}

.btn-group {
	position: absolute;
	bottom: 0;
}

.btn {
	width: 55px;
	height: 42px;
	line-height: 42px;
	text-align: center;
	border-radius: 5px;
	float: left;
	color: #fff;
	margin: 0 5px;
	margin-bottom: 14px;
	box-shadow: 0 5px 10px #717170;
	font: "calisto mt",18px;
	cursor: pointer;
}

.screen {
	height: 62px;
	width: 240px;
	margin-left: 5px;

	padding: 5px;
	background: url("http://imglf0.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrSzB0RjdmdVlxQkI5QUFFM3owM0RldjRYSDcwMWRpWG5nPT0.png?imageView&thumbnail=1680x0&quality=96&stripmeta=0&type=jpg") no-repeat scroll top left;
	background-size: 250px 72px;
	border-radius: 10px;
}


#answer {
	width: 230px;
	height: 30px;
	margin: 5px;
	margin-top: 16px;
	padding: 0;
	background: url(../img/pic_bg.png) repeat scroll top right;
	background-size: contain;
	font-family: "Let's go Digital Regular";
	line-height: 30px;
	font-size: 40px;
	text-align: right;
	letter-spacing: 2px;
	overflow: hidden;
}

.number {
	background: url("http://imglf.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrRCswSU9kTEMxbng5cGlyeHhCUzdrOVhPMEl6clU0WUhRPT0.jpg?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll;
	background-size: contain;
	color: #5a5653;
}

.memory {
	background: url("http://imglf.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrTXpGNjBoWU5TeFREaThVa2JkdytZcXpta0RlZkh5UW1nPT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
}

.math {
	background: url("http://imglf2.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrQTl3WnVTb2l2ek5ySElzLzcyc3BySzdjZ0RvWURLRGR3PT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
}

#equl {
	background: url("http://imglf0.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrSDFIWWlpTmFmbWQ1UzFuM001cDBpdlVhSUV2b28xY2tBPT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
	height: 98px;
	line-height: 98px;
	float: right;
	margin-right: 10px;
}

#zero {
	width: 120px;
}

.numberClick {
	background: url("http://imglf.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrQzRvbDZpSHBQWTdRcFpWZmZ6Q3pXbGtLR2M2N2lrVUVRPT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
}

.mathClick {
	background: url("http://imglf2.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrRTJlTzhNVXUrRm4zVGhBbTVsb0tjVk5FbmtWaGVyNSt3PT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
}

.memoryClick {
	background: url("http://imglf0.nosdn.127.net/img/dis1c3pkblY3UWxkMk5seUV2ZTVrSWY5RHVyRFpTYUJ5R2hob3pkVzlZNXNkYkpTNE8xOEJ3PT0.png?imageView&thumbnail=500x0&quality=96&stripmeta=0&type=jpg") repeat scroll top left;
	background-size: contain;
}