html, body {
	margin: 0;
	padding: 0;
	width: 100%;
	background: #0d1117;
	overflow-x: hidden;
	overflow-y: auto;   /* scroll pionowy jeśli dokument nie mieści się w oknie */
}

.page-wrapper {
	width: 100%;
	display: flex;
	justify-content: center;
	align-items: flex-start;
	padding: 0px 0;
	box-sizing: border-box;
	background: #0d1117;
}

.page-scaler {
	width: 595px;
	height: 842px;
	transform-origin: top center;  /* skaluj od góry, nie od środka */
	flex-shrink: 0;
	overflow: hidden;
}

.contentIframeClass {
	width: 595px;
	height: 842px;
	border: none;
	display: block;
	margin: 0;
	padding: 0;
	overflow: hidden;
}

.dummyFrameClass {
	display: none;
}

.prev, .next {
	cursor: pointer;
	position: fixed;
	top: 50%;
	transform: translateY(-50%);
	padding: 15px;
	color: #333;
	background: rgba(255,255,255,0.75);
	font-weight: bold;
	font-size: 30px;
	visibility: hidden;
	z-index: 999;
	user-select: none;
}
.prev { left: 0;  border-radius: 0 3px 3px 0; }
.next { right: 0; border-radius: 3px 0 0 3px; }