* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	background-color: white;
}
.container {
	height: 100vh;
	width: 100vw;
	display: flex;
	flex-wrap: nowrap;
	justify-content: space-around;
	align-items: center;
}

select{
	height: 20px;
}

.gameWindow,
.hintWindow{
	width: 604px;
	height: 604px;
	display: flex;
	flex-wrap: wrap;
	border: 2px solid black;
	border-radius: 4px;
	display: flex;
	flex-wrap: wrap;
	overflow: hidden;
}

.gameWindow>div{
	background-image: url(../images/1.jpg);
	width: 150px;
	height: 150px;
	border: 1px solid black;
	background-repeat: no-repeat;
	background-size: 600px;
	z-index: 100;
}
.empty{
	background-image: none;
	background-color: white;
}
.puzzle2{
	background-position: -150px 0px;
}
.puzzle3{
	background-position: -300px 0px;
}
.puzzle4{
	background-position: -450px 0px;
}
.puzzle11{
	background-position: 0px -150px;
}
.puzzle12{
	background-position: -150px -150px;
}
.puzzle13{
	background-position: -300px -150px
}
.puzzle14{
	background-position: -450px -150px
}
.puzzle21{
	background-position: 0px -300px;
}
.puzzle22{
	background-position: -150px -300px;
}
.puzzle23{
	background-position: -300px -300px;
}
.puzzle24{
	background-position: -450px -300px
}
.puzzle31{
	background-position: 0px -450px;
}
.puzzle32{
	background-position: -150px -450px;
}
.puzzle33{
	background-position: -300px -450px;
}
.puzzle34{
	background-position: -450px -450px;
}

.startBtn,
.picSelect{
	width: 150px;
	height: 35px;
	border: 3px solid black;
	border-radius: 5px;
	display: block;
	background-color: lightgray;
	font-weight: 700;
	font-variant-caps: 20px;
	line-height: 32px;
	text-align: center;
	margin-bottom: 15px;
}

.hintWindow{
	position: relative;
}
.hint {
	position: absolute;
	width: 100%;
	height: 100%;
	opacity: 0.4;
	color: black;
	font-size: 80px;
	line-height: 600px;
	letter-spacing: 10px;
	text-align: center;
	background-color: white;
}
#overlay {
	background-color: rgba(0, 0, 0, 0.8);
	color: white;
	text-align:center;
	z-index: 100;
	display: none;
	position: fixed;
	top: 35%;
	left: 45%;
	}
#overlay img {
   
}