html, body {

}
div.img_back1 {
	background-image: url('img/back_table.jpg?sdgfsd');
	background-position: center;
	background-size: cover;
	background-repeat: no-repeat;
	/*
	-webkit-filter: blur(8px);
	-moz-filter: blur(8px);
	-o-filter: blur(8px);
	-ms-filter: blur(8px);
	filter: blur(8px);
	margin-left: -2%;
	margin-top: -2%;
	width: 105%;
	height: 105%;
	opacity: .6;
	*/	
	z-index: -2;
}
/*
div.img_back2 {
	background-image: url('img/back_waiter.png');
	background-position: left center;
	background-size: cover;
	background-repeat: no-repeat;
	z-index: -1;
	opacity: .8;
}
*/
.logo {
	position: absolute;
	width: 50vh;
	transform: translate(-50%,-50%);
	top: 50%;
	left: 50%;
	-webkit-filter: drop-shadow(0 0 6px #000);	
}
.setup {
	bottom: 0;
	left: 0;
	margin: 20px;
	vertical-align: middle;
}
.setup select {
	font-size: 18px;		
	margin-right: 20px;	
	padding: 4px;
	vertical-align: middle;
	background-color: #fff;
	color: #059;
}
.setup .enter {
	vertical-align: middle;	
	font-size: 18px;	
	border: 0;
	background-color: #0c0;
	color: #fff;
	font-weight: bold;
	padding: 8px;
}
.setup .battery_level {
	color: #fff;
	font-size: 16px;
}