body { 
	background: black;
	padding: 0; 
	margin: 0 ;
}
#unity-container { 
    width: 100vw; 
    height: 56.25vw; /* height:width ratio = 9/16 = .5625  */
    background: black;
    max-height: 100vh;
    max-width: 177.78vh; /* 16/9 = 1.778 */
    margin: auto;
    position: absolute;
    top:0;bottom:0; /* vertical center */
    left:0;right:0; /* horizontal center */
 }
#unity-canvas { 
   position:  absolute;
   top: 0;
   left: 0;
   bottom: 0;
   right: 0;
   text-align: center;
   background: url(1759_Chargement.jpg) no-repeat center center;
   background-size: contain;
 }