reveal.scss

		visibility: hidden;
		overflow: hidden;

		background-color: rgba( 0, 0, 0, 0 );
		background-position: 50% 50%;
		background-repeat: no-repeat;
		background-size: cover;

		transition: all 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
	}

	.reveal .slide-background.stack {
		display: block;
	}

	.reveal .slide-background.present {
		opacity: 1;
		visibility: visible;
		z-index: 2;
	}

	.print-pdf .reveal .slide-background {
		opacity: 1 !important;
		visibility: visible !important;
	}

/* Video backgrounds */
.reveal .slide-background video {
	position: absolute;
	width: 100%;
	height: 100%;
	max-width: none;
	max-height: none;
	top: 0;
	left: 0;
	object-fit: cover;
}
	.reveal .slide-background[data-background-size="contain"] video {
		object-fit: contain;
	}

/* Immediate transition style */
.reveal[data-background-transition=none]>.backgrounds .slide-background,
.reveal>.backgrounds .slide-background[data-background-transition=none] {
	transition: none;
}

/* Slide */
.reveal[data-background-transition=slide]>.backgrounds .slide-background,
.reveal>.backgrounds .slide-background[data-background-transition=slide] {
	opacity: 1;
	backface-visibility: hidden;
}
	.reveal[data-background-transition=slide]>.backgrounds .slide-background.past,
	.reveal>.backgrounds .slide-background.past[data-background-transition=slide] {
		transform: translate(-100%, 0);
	}
	.reveal[data-background-transition=slide]>.backgrounds .slide-background.future,
	.reveal>.backgrounds .slide-background.future[data-background-transition=slide] {
		transform: translate(100%, 0);
	}

	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.past,
	.reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=slide] {
		transform: translate(0, -100%);
	}
	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.future,
	.reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=slide] {
		transform: translate(0, 100%);
	}


/* Convex */
.reveal[data-background-transition=convex]>.backgrounds .slide-background.past,
.reveal>.backgrounds .slide-background.past[data-background-transition=convex] {
	opacity: 0;
	transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
}
.reveal[data-background-transition=convex]>.backgrounds .slide-background.future,
.reveal>.backgrounds .slide-background.future[data-background-transition=convex] {
	opacity: 0;
	transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
}

.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.past,
.reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=convex] {
	opacity: 0;
	transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0);
}
.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.future,
.reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=convex] {
	opacity: 0;
	transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0);
}


/* Concave */
.reveal[data-background-transition=concave]>.backgrounds .slide-background.past,
.reveal>.backgrounds .slide-background.past[data-background-transition=concave] {
	opacity: 0;
	transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
}
.reveal[data-background-transition=concave]>.backgrounds .slide-background.future,
.reveal>.backgrounds .slide-background.future[data-background-transition=concave] {
	opacity: 0;
	transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
}

.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.past,
.reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=concave] {
	opacity: 0;
	transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0);
}
.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.future,
.reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=concave] {
	opacity: 0;
	transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0);
}

/* Zoom */
.reveal[data-background-transition=zoom]>.backgrounds .slide-background,
.reveal>.backgrounds .slide-background[data-background-transition=zoom] {
	transition-timing-function: ease;
}

.reveal[data-background-transition=zoom]>.backgrounds .slide-background.past,
.reveal>.backgrounds .slide-background.past[data-background-transition=zoom] {
	opacity: 0;
	visibility: hidden;
	transform: scale(16);
}
.reveal[data-background-transition=zoom]>.backgrounds .slide-background.future,
.reveal>.backgrounds .slide-background.future[data-background-transition=zoom] {
	opacity: 0;
	visibility: hidden;
	transform: scale(0.2);
}

.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.past,
.reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=zoom] {
	opacity: 0;
		visibility: hidden;
		transform: scale(16);
}
.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.future,
.reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=zoom] {
	opacity: 0;
	visibility: hidden;
	transform: scale(0.2);
}


/* Global transition speed settings */
.reveal[data-transition-speed="fast"]>.backgrounds .slide-background {
	transition-duration: 400ms;
}
.reveal[data-transition-speed="slow"]>.backgrounds .slide-background {
	transition-duration: 1200ms;
}


/*********************************************
 * OVERVIEW
 *********************************************/

.reveal.overview {
	perspective-origin: 50% 50%;
	perspective: 700px;

	.slides {
		// Fixes overview rendering errors in FF48+, not applied to
		// other browsers since it degrades performance
		-moz-transform-style: preserve-3d;
	}

	.slides section {
		height: 100%;
		top: 0 !important;
		opacity: 1 !important;
		overflow: hidden;
		visibility: visible !important;
		cursor: pointer;
		box-sizing: border-box;
	}
	.slides section:hover,
	.slides section.present {
		outline: 10px solid rgba(150,150,150,0.4);
		outline-offset: 10px;
	}
	.slides section .fragment {
		opacity: 1;
		transition: none;
	}
	.slides section:after,
	.slides section:before {
		display: none !important;
	}
	.slides>section.stack {
		padding: 0;
		top: 0 !important;
		background: none;
		outline: none;
		overflow: visible;
	}

	.backgrounds {
		perspective: inherit;

		// Fixes overview rendering errors in FF48+, not applied to
		// other browsers since it degrades performance
		-moz-transform-style: preserve-3d;
	}

	.backgrounds .slide-background {
		opacity: 1;
		visibility: visible;

		// This can't be applied to the slide itself in Safari
		outline: 10px solid rgba(150,150,150,0.1);
		outline-offset: 10px;
	}

	.backgrounds .slide-background.stack {
		overflow: visible;
	}
}

// Disable transitions transitions while we're activating
// or deactivating the overview mode.
.reveal.overview .slides section,
.reveal.overview-deactivating .slides section {
	transition: none;
}

.reveal.overview .backgrounds .slide-background,
.reveal.overview-deactivating .backgrounds .slide-background {
	transition: none;
}


/*********************************************
 * RTL SUPPORT
 *********************************************/

.reveal.rtl .slides,
.reveal.rtl .slides h1,
.reveal.rtl .slides h2,
.reveal.rtl .slides h3,
.reveal.rtl .slides h4,
.reveal.rtl .slides h5,
.reveal.rtl .slides h6 {
	direction: rtl;
	font-family: sans-serif;
}

.reveal.rtl pre,
.reveal.rtl code {
	direction: ltr;
}

.reveal.rtl ol,
.reveal.rtl ul {
	text-align: right;
}

.reveal.rtl .progress span {
	float: right
}

/*********************************************
 * PARALLAX BACKGROUND
 *********************************************/

.reveal.has-parallax-background .backgrounds {
	transition: all 0.8s ease;
}

/* Global transition speed settings */
.reveal.has-parallax-background[data-transition-speed="fast"] .backgrounds {
	transition-duration: 400ms;
}
.reveal.has-parallax-background[data-transition-speed="slow"] .backgrounds {
	transition-duration: 1200ms;
}


/*********************************************
 * LINK PREVIEW OVERLAY
 *********************************************/

.reveal .overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 1000;
	background: rgba( 0, 0, 0, 0.9 );
	opacity: 0;
	visibility: hidden;
	transition: all 0.3s ease;
}
	.reveal .overlay.visible {
		opacity: 1;
		visibility: visible;
	}

	.reveal .overlay .spinner {
		position: absolute;
		display: block;
		top: 50%;
		left: 50%;
		width: 32px;
		height: 32px;
		margin: -16px 0 0 -16px;
		z-index: 10;
		background-image: url(data:image/gif;base64,R0lGODlhIAAgAPMAAJmZmf%2F%2F%2F6%2Bvr8nJybW1tcDAwOjo6Nvb26ioqKOjo7Ozs%2FLy8vz8%2FAAAAAAAAAAAACH%2FC05FVFNDQVBFMi4wAwEAAAAh%2FhpDcmVhdGVkIHdpdGggYWpheGxvYWQuaW5mbwAh%2BQQJCgAAACwAAAAAIAAgAAAE5xDISWlhperN52JLhSSdRgwVo1ICQZRUsiwHpTJT4iowNS8vyW2icCF6k8HMMBkCEDskxTBDAZwuAkkqIfxIQyhBQBFvAQSDITM5VDW6XNE4KagNh6Bgwe60smQUB3d4Rz1ZBApnFASDd0hihh12BkE9kjAJVlycXIg7CQIFA6SlnJ87paqbSKiKoqusnbMdmDC2tXQlkUhziYtyWTxIfy6BE8WJt5YJvpJivxNaGmLHT0VnOgSYf0dZXS7APdpB309RnHOG5gDqXGLDaC457D1zZ%2FV%2FnmOM82XiHRLYKhKP1oZmADdEAAAh%2BQQJCgAAACwAAAAAIAAgAAAE6hDISWlZpOrNp1lGNRSdRpDUolIGw5RUYhhHukqFu8DsrEyqnWThGvAmhVlteBvojpTDDBUEIFwMFBRAmBkSgOrBFZogCASwBDEY%2FCZSg7GSE0gSCjQBMVG023xWBhklAnoEdhQEfyNqMIcKjhRsjEdnezB%2BA4k8gTwJhFuiW4dokXiloUepBAp5qaKpp6%2BHo7aWW54wl7obvEe0kRuoplCGepwSx2jJvqHEmGt6whJpGpfJCHmOoNHKaHx61WiSR92E4lbFoq%2BB6QDtuetcaBPnW6%2BO7wDHpIiK9SaVK5GgV543tzjgGcghAgAh%2BQQJCgAAACwAAAAAIAAgAAAE7hDISSkxpOrN5zFHNWRdhSiVoVLHspRUMoyUakyEe8PTPCATW9A14E0UvuAKMNAZKYUZCiBMuBakSQKG8G2FzUWox2AUtAQFcBKlVQoLgQReZhQlCIJesQXI5B0CBnUMOxMCenoCfTCEWBsJColTMANldx15BGs8B5wlCZ9Po6OJkwmRpnqkqnuSrayqfKmqpLajoiW5HJq7FL1Gr2mMMcKUMIiJgIemy7xZtJsTmsM4xHiKv5KMCXqfyUCJEonXPN2rAOIAmsfB3uPoAK%2B%2BG%2Bw48edZPK%2BM6hLJpQg484enXIdQFSS1u6UhksENEQAAIfkECQoAAAAsAAAAACAAIAAABOcQyEmpGKLqzWcZRVUQnZYg1aBSh2GUVEIQ2aQOE%2BG%2BcD4ntpWkZQj1JIiZIogDFFyHI0UxQwFugMSOFIPJftfVAEoZLBbcLEFhlQiqGp1Vd140AUklUN3eCA51C1EWMzMCezCBBmkxVIVHBWd3HHl9JQOIJSdSnJ0TDKChCwUJjoWMPaGqDKannasMo6WnM562R5YluZRwur0wpgqZE7NKUm%2BFNRPIhjBJxKZteWuIBMN4zRMIVIhffcgojwCF117i4nlLnY5ztRLsnOk%2BaV%2BoJY7V7m76PdkS4trKcdg0Zc0tTcKkRAAAIfkECQoAAAAsAAAAACAAIAAABO4QyEkpKqjqzScpRaVkXZWQEximw1BSCUEIlDohrft6cpKCk5xid5MNJTaAIkekKGQkWyKHkvhKsR7ARmitkAYDYRIbUQRQjWBwJRzChi9CRlBcY1UN4g0%2FVNB0AlcvcAYHRyZPdEQFYV8ccwR5HWxEJ02YmRMLnJ1xCYp0Y5idpQuhopmmC2KgojKasUQDk5BNAwwMOh2RtRq5uQuPZKGIJQIGwAwGf6I0JXMpC8C7kXWDBINFMxS4DKMAWVWAGYsAdNqW5uaRxkSKJOZKaU3tPOBZ4DuK2LATgJhkPJMgTwKCdFjyPHEnKxFCDhEAACH5BAkKAAAALAAAAAAgACAAAATzEMhJaVKp6s2nIkolIJ2WkBShpkVRWqqQrhLSEu9MZJKK9y1ZrqYK9WiClmvoUaF8gIQSNeF1Er4MNFn4SRSDARWroAIETg1iVwuHjYB1kYc1mwruwXKC9gmsJXliGxc%2BXiUCby9ydh1sOSdMkpMTBpaXBzsfhoc5l58Gm5yToAaZhaOUqjkDgCWNHAULCwOLaTmzswadEqggQwgHuQsHIoZCHQMMQgQGubVEcxOPFAcMDAYUA85eWARmfSRQCdcMe0zeP1AAygwLlJtPNAAL19DARdPzBOWSm1brJBi45soRAWQAAkrQIykShQ9wVhHCwCQCACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiRMDjI0Fd30%2FiI2UA5GSS5UDj2l6NoqgOgN4gksEBgYFf0FDqKgHnyZ9OX8HrgYHdHpcHQULXAS2qKpENRg7eAMLC7kTBaixUYFkKAzWAAnLC7FLVxLWDBLKCwaKTULgEwbLA4hJtOkSBNqITT3xEgfLpBtzE%2FjiuL04RGEBgwWhShRgQExHBAAh%2BQQJCgAAACwAAAAAIAAgAAAE7xDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfZiCqGk5dTESJeaOAlClzsJsqwiJwiqnFrb2nS9kmIcgEsjQydLiIlHehhpejaIjzh9eomSjZR%2BipslWIRLAgMDOR2DOqKogTB9pCUJBagDBXR6XB0EBkIIsaRsGGMMAxoDBgYHTKJiUYEGDAzHC9EACcUGkIgFzgwZ0QsSBcXHiQvOwgDdEwfFs0sDzt4S6BK4xYjkDOzn0unFeBzOBijIm1Dgmg5YFQwsCMjp1oJ8LyIAACH5BAkKAAAALAAAAAAgACAAAATwEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GGl6NoiPOH16iZKNlH6KmyWFOggHhEEvAwwMA0N9GBsEC6amhnVcEwavDAazGwIDaH1ipaYLBUTCGgQDA8NdHz0FpqgTBwsLqAbWAAnIA4FWKdMLGdYGEgraigbT0OITBcg5QwPT4xLrROZL6AuQAPUS7bxLpoWidY0JtxLHKhwwMJBTHgPKdEQAACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GAULDJCRiXo1CpGXDJOUjY%2BYip9DhToJA4RBLwMLCwVDfRgbBAaqqoZ1XBMHswsHtxtFaH1iqaoGNgAIxRpbFAgfPQSqpbgGBqUD1wBXeCYp1AYZ19JJOYgH1KwA4UBvQwXUBxPqVD9L3sbp2BNk2xvvFPJd%2BMFCN6HAAIKgNggY0KtEBAAh%2BQQJCgAAACwAAAAAIAAgAAAE6BDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfYIDMaAFdTESJeaEDAIMxYFqrOUaNW4E4ObYcCXaiBVEgULe0NJaxxtYksjh2NLkZISgDgJhHthkpU4mW6blRiYmZOlh4JWkDqILwUGBnE6TYEbCgevr0N1gH4At7gHiRpFaLNrrq8HNgAJA70AWxQIH1%2BvsYMDAzZQPC9VCNkDWUhGkuE5PxJNwiUK4UfLzOlD4WvzAHaoG9nxPi5d%2BjYUqfAhhykOFwJWiAAAIfkECQoAAAAsAAAAACAAIAAABPAQyElpUqnqzaciSoVkXVUMFaFSwlpOCcMYlErAavhOMnNLNo8KsZsMZItJEIDIFSkLGQoQTNhIsFehRww2CQLKF0tYGKYSg%2BygsZIuNqJksKgbfgIGepNo2cIUB3V1B3IvNiBYNQaDSTtfhhx0CwVPI0UJe0%2Bbm4g5VgcGoqOcnjmjqDSdnhgEoamcsZuXO1aWQy8KAwOAuTYYGwi7w5h%2BKr0SJ8MFihpNbx%2B4Erq7BYBuzsdiH1jCAzoSfl0rVirNbRXlBBlLX%2BBP0XJLAPGzTkAuAOqb0WT5AH7OcdCm5B8TgRwSRKIHQtaLCwg1RAAAOwAAAAAAAAAAAA%3D%3D);

		visibility: visible;
		opacity: 0.6;
		transition: all 0.3s ease;
	}

	.reveal .overlay header {
		position: absolute;
		left: 0;
		top: 0;
		width: 100%;
		height: 40px;
		z-index: 2;
		border-bottom: 1px solid #222;
	}
		.reveal .overlay header a {
			display: inline-block;
			width: 40px;
			height: 40px;
			line-height: 36px;
			padding: 0 10px;
			float: right;
			opacity: 0.6;

			box-sizing: border-box;
		}
			.reveal .overlay header a:hover {
				opacity: 1;
			}
			.reveal .overlay header a .icon {
				display: inline-block;
				width: 20px;
				height: 20px;

				background-position: 50% 50%;
				background-size: 100%;
				background-repeat: no-repeat;
			}
			.reveal .overlay header a.close .icon {
				background-image: url(data:image/png;base64,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);
			}
			.reveal .overlay header a.external .icon {
				background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAAcElEQVRYR+2WSQoAIQwEzf8f7XiOMkUQxUPlGkM3hVmiQfQR9GYnH1SsAQlI4DiBqkCMoNb9y2e90IAEJPAcgdznU9+engMaeJ7Azh5Y1U67gAho4DqBqmB1buAf0MB1AlVBek83ZPkmJMGc1wAR+AAqod/B97TRpQAAAABJRU5ErkJggg==);
			}

	.reveal .overlay .viewport {
		position: absolute;
		display: flex;
		top: 40px;
		right: 0;
		bottom: 0;
		left: 0;
	}

	.reveal .overlay.overlay-preview .viewport iframe {
		width: 100%;
		height: 100%;
		max-width: 100%;
		max-height: 100%;
		border: 0;

		opacity: 0;
		visibility: hidden;
		transition: all 0.3s ease;
	}

	.reveal .overlay.overlay-preview.loaded .viewport iframe {
		opacity: 1;
		visibility: visible;
	}

	.reveal .overlay.overlay-preview.loaded .viewport-inner  {
		position: absolute;
		z-index: -1;
		left: 0;
		top: 45%;
		width: 100%;
		text-align: center;
		letter-spacing: normal;
	}
	.reveal .overlay.overlay-preview .x-frame-error  {
		opacity: 0;
		transition: opacity 0.3s ease 0.3s;
	}
	.reveal .overlay.overlay-preview.loaded .x-frame-error  {
		opacity: 1;
	}

	.reveal .overlay.overlay-preview.loaded .spinner {
		opacity: 0;
		visibility: hidden;
		transform: scale(0.2);
	}

	.reveal .overlay.overlay-help .viewport {
		overflow: auto;
		color: #fff;
	}

	.reveal .overlay.overlay-help .viewport .viewport-inner {
		width: 600px;
		margin: auto;
		padding: 20px 20px 80px 20px;
		text-align: center;
		letter-spacing: normal;
	}

	.reveal .overlay.overlay-help .viewport .viewport-inner .title {
		font-size: 20px;
	}

	.reveal .overlay.overlay-help .viewport .viewport-inner table {
		border: 1px solid #fff;
		border-collapse: collapse;
		font-size: 16px;
	}

	.reveal .overlay.overlay-help .viewport .viewport-inner table th,
	.reveal .overlay.overlay-help .viewport .viewport-inner table td {
		width: 200px;
		padding: 14px;
		border: 1px solid #fff;
		vertical-align: middle;
	}

	.reveal .overlay.overlay-help .viewport .viewport-inner table th {
		padding-top: 20px;
		padding-bottom: 20px;
	}



/*********************************************
 * PLAYBACK COMPONENT
 *********************************************/

.reveal .playback {
	position: fixed;
	left: 15px;
	bottom: 20px;
	z-index: 30;
	cursor: pointer;
	transition: all 400ms ease;
}

.reveal.overview .playback {
	opacity: 0;
	visibility: hidden;
}


/*********************************************
 * ROLLING LINKS
 *********************************************/

.reveal .roll {
	display: inline-block;
	line-height: 1.2;
	overflow: hidden;

	vertical-align: top;
	perspective: 400px;
	perspective-origin: 50% 50%;
}
	.reveal .roll:hover {
		background: none;
		text-shadow: none;
	}
.reveal .roll span {
	display: block;
	position: relative;
	padding: 0 2px;

	pointer-events: none;
	transition: all 400ms ease;
	transform-origin: 50% 0%;
	transform-style: preserve-3d;
	backface-visibility: hidden;
}
	.reveal .roll:hover span {
	    background: rgba(0,0,0,0.5);
	    transform: translate3d( 0px, 0px, -45px ) rotateX( 90deg );
	}
.reveal .roll span:after {
	content: attr(data-title);

	display: block;
	position: absolute;
	left: 0;
	top: 0;
	padding: 0 2px;
	backface-visibility: hidden;
	transform-origin: 50% 0%;
	transform: translate3d( 0px, 110%, 0px ) rotateX( -90deg );
}


/*********************************************
 * SPEAKER NOTES
 *********************************************/

// Hide on-page notes
.reveal aside.notes {
	display: none;
}

// An interface element that can optionally be used to show the
// speaker notes to all viewers, on top of the presentation
.reveal .speaker-notes {
	display: none;
	position: absolute;
	width: 20vw;
	height: 100%;
	top: 0;
	left: 100%;
	padding: 14px;
	z-index: 1;
	font-size: 18px;
	line-height: 1.4;
	color: #222;
	background-color: #f5f5f5;
	overflow: auto;
	box-sizing: border-box;
	text-align: left;
	font-family: Helvetica, sans-serif;
	-webkit-overflow-scrolling: touch;

	&:before {
		content: 'Speaker notes';
		display: block;
		margin-bottom: 10px;
		opacity: 0.5;
	}
}

.reveal.show-notes {
	max-width: 80vw;
	overflow: visible;
}

.reveal.show-notes .speaker-notes {
	display: block;
}

@media screen and (max-width: 1024px) {
	.reveal.show-notes {
		max-width: none;
		max-height: 70vh;
		overflow: visible;
	}

	.reveal.show-notes .speaker-notes {
		top: 70vh;
		left: 0;
		width: 100%;
		height: 30vh;
	}
}

@media screen and (max-width: 600px) {
	.reveal .speaker-notes {
		font-size: 14px;
	}
}


/*********************************************
 * ZOOM PLUGIN
 *********************************************/

.zoomed .reveal *,
.zoomed .reveal *:before,
.zoomed .reveal *:after {
	backface-visibility: visible !important;
}

.zoomed .reveal .progress,
.zoomed .reveal .controls {
	opacity: 0;
}

.zoomed .reveal .roll span {
	background: none;
}

.zoomed .reveal .roll span:after {
	visibility: hidden;
}