*{box-sizing:border-box;}
body{
	font-size:100%;
	margin:0;
	padding:0;
}
#masking{
	position:absolute;
	top:0;
	right:0;
	bottom:0;
	left:0;
	display:flex;
	align-items:center;
	justify-content: center;
	background-color:#000;
}
#video{
	display:block;
	width:100%;
	max-height:100vh;
}
#controls{
	position: fixed;
	bottom: 20px;
	left: 20px;
	display: flex;
	gap: 10px;
	align-items: center;
}