html { 
	font-size: 62.5%;
} 
body { 
	margin: 0px; 
	padding: 0px; 
} 
#jeu { 
	border-style:solid; 
	border-width:1px; 
	background-color:#00008B; 
	margin:0px; 
	width: 306px; 
	height:306px; 
	position: absolute; 
} 
.case { 
	border-style:solid; 
	border-width:1px; 
	background-color:#1E90FF; 
	margin:0px; 
	padding: 0px; 
	width: 100px; 
	height:100px; 
	position: absolute; 
	z-index:1; 
	transition-property : top, left; 
	transition-duration : 1s; 
} 
div{
		padding:0px;
}
h1{ 
	text-align: center; 
	font-size: 4rem; 
	margin:0;
	padding: 27px 0px;
} 
.vide { 
	background-color:#00008B; 
	z-index:0; 
	border:none
}