html, body {
	background: transparent;
	margin: 0;
	padding: 0;
}
img {
	position: fixed;
	top: 50%;
	left: 50%;
	width: 100vh;
	height: 100vh;
	transform: translate(-50%, -50%);
}
section {
	opacity: 0.25;
	transition: opacity 0.25s;
}
section[data-always],
section.on {
	opacity: 1;
}
section.on.speak > div > img:first-child,
section.on:not(.speak) > div > img:last-child,
section:not(.on) > div > img:last-child {
	display: none;
}
section > div > img:first-child:last-child {
	display: block !important;
}