#book {
	width: calc(100vw - 2rem);
	height: calc(800 / 872 * calc(100vw - 2rem));
	height: calc(var(--aspect-ratio) * calc(100vw - 2rem));
	margin: 0 auto;
	box-shadow: 0 0 20px rgba(255,255,255, .5);
	overflow: hidden;
}

#book .turn-page{
	background-color:white;
}

#book .cover{
	background:#333;
}

#book .cover h1{
	color:white;
	text-align:center;
	font-size:50px;
	margin:0px;
}

#book .loader{
	background-image:url(loader.gif);
	width:24px;
	height:24px;
	display:block;
	position:absolute;
	top:238px;
	left:188px;
}

#book .data{
	text-align:center;
	font-size:40px;
	color:#999;
	line-height:500px;
}

#controls{
	width:100%;
	text-align:center;
	margin:20px 0px;
	font:30px arial;
}

#controls input, #controls label{
	font:30px arial;
}

#book .odd{
	background-image:-webkit-linear-gradient(left, #FFF 95%, #ddd 100%);
	background-image:-moz-linear-gradient(left, #FFF 95%, #ddd 100%);
	background-image:-o-linear-gradient(left, #FFF 95%, #ddd 100%);
	background-image:-ms-linear-gradient(left, #FFF 95%, #ddd 100%);
}

#book .even{
	background-image:-webkit-linear-gradient(right, #FFF 95%, #ddd 100%);
	background-image:-moz-linear-gradient(right, #FFF 95%, #ddd 100%);
	background-image:-o-linear-gradient(right, #FFF 95%, #ddd 100%);
	background-image:-ms-linear-gradient(right, #FFF 95%, #ddd 100%);
}

.page-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}