reveal.scss

@use "sass:math";

/**
 * reveal.js
 * http://revealjs.com
 * MIT licensed
 *
 * Copyright (C) Hakim El Hattab, https://hakim.se
 */

@import 'layout';

/*********************************************
 * GLOBAL STYLES
 *********************************************/

html.reveal-full-page {
	width: 100%;
	height: 100%;
	height: 100vh;
	height: calc( var(--vh, 1vh) * 100 );
	height: 100svh;
	overflow: hidden;
}

.reveal-viewport {
	height: 100%;
	overflow: hidden;
	position: relative;
	line-height: 1;
	margin: 0;

	background-color: #fff;
	color: #000;

	--r-reader-progress-width: 8px;
	--r-controls-spacing: 12px;
}

// Force the presentation to cover the full viewport when we
// enter fullscreen mode. Fixes sizing issues in Safari.
.reveal-viewport:fullscreen {
	top: 0 !important;
	left: 0 !important;
	width: 100% !important;
	height: 100% !important;
	transform: none !important;
}


/*********************************************
 * VIEW FRAGMENTS
 *********************************************/

.reveal .fragment {
	transition: all .2s ease;

	&:not(.custom) {
		opacity: 0;
		visibility: hidden;
		will-change: opacity;
	}

	&.visible {
		opacity: 1;
		visibility: inherit;
	}

	&.disabled {
		transition: none;
	}
}

.reveal .fragment.grow {
	opacity: 1;
	visibility: inherit;

	&.visible {
		transform: scale( 1.3 );
	}
}

.reveal .fragment.shrink {
	opacity: 1;
	visibility: inherit;

	&.visible {
		transform: scale( 0.7 );
	}
}

.reveal .fragment.zoom-in {
	transform: scale( 0.1 );

	&.visible {
		transform: none;
	}
}

.reveal .fragment.fade-out {
	opacity: 1;
	visibility: inherit;

	&.visible {
		opacity: 0;
		visibility: hidden;
	}
}

.reveal .fragment.semi-fade-out {
	opacity: 1;
	visibility: inherit;

	&.visible {
		opacity: 0.5;
		visibility: inherit;
	}
}

.reveal .fragment.strike {
	opacity: 1;
	visibility: inherit;

	&.visible {
		text-decoration: line-through;
	}
}

.reveal .fragment.fade-up {
	transform: translate(0, 40px);

	&.visible {
		transform: translate(0, 0);
	}
}

.reveal .fragment.fade-down {
	transform: translate(0, -40px);

	&.visible {
		transform: translate(0, 0);
	}
}

.reveal .fragment.fade-right {
	transform: translate(-40px, 0);

	&.visible {
		transform: translate(0, 0);
	}
}

.reveal .fragment.fade-left {
	transform: translate(40px, 0);

	&.visible {
		transform: translate(0, 0);
	}
}

.reveal .fragment.fade-in-then-out,
.reveal .fragment.current-visible {
	opacity: 0;
	visibility: hidden;

	&.current-fragment {
		opacity: 1;
		visibility: inherit;
	}
}

.reveal .fragment.fade-in-then-semi-out {
	opacity: 0;
	visibility: hidden;

	&.visible {
		opacity: 0.5;
		visibility: inherit;
	}

	&.current-fragment {
		opacity: 1;
		visibility: inherit;
	}
}

.reveal .fragment.highlight-red,
.reveal .fragment.highlight-current-red,
.reveal .fragment.highlight-green,
.reveal .fragment.highlight-current-green,
.reveal .fragment.highlight-blue,
.reveal .fragment.highlight-current-blue {
	opacity: 1;
	visibility: inherit;
}
	.reveal .fragment.highlight-red.visible {
		color: #ff2c2d
	}
	.reveal .fragment.highlight-green.visible {
		color: #17ff2e;
	}
	.reveal .fragment.highlight-blue.visible {
		color: #1b91ff;
	}

.reveal .fragment.highlight-current-red.current-fragment {
	color: #ff2c2d
}
.reveal .fragment.highlight-current-green.current-fragment {
	color: #17ff2e;
}
.reveal .fragment.highlight-current-blue.current-fragment {
	color: #1b91ff;
}


/*********************************************
 * DEFAULT ELEMENT STYLES
 *********************************************/

/* Fixes issue in Chrome where italic fonts did not appear when printing to PDF */
.reveal:after {
  content: '';
  font-style: italic;
}

.reveal iframe {
	z-index: 1;
}

/** Prevents layering issues in certain browser/transition combinations */
.reveal a {
	position: relative;
}


/*********************************************
 * CONTROLS
 *********************************************/

@keyframes bounce-right {
	0%, 10%, 25%, 40%, 50% {transform: translateX(0);}
	20% {transform: translateX(10px);}
	30% {transform: translateX(-5px);}
}

@keyframes bounce-left {
	0%, 10%, 25%, 40%, 50% {transform: translateX(0);}
	20% {transform: translateX(-10px);}
	30% {transform: translateX(5px);}
}

@keyframes bounce-down {
	0%, 10%, 25%, 40%, 50% {transform: translateY(0);}
	20% {transform: translateY(10px);}
	30% {transform: translateY(-5px);}
}

$controlArrowSize: 3.6em;
$controlArrowSpacing: 1.4em;
$controlArrowLength: 2.6em;
$controlArrowThickness: 0.5em;
$controlsArrowAngle: 45deg;
$controlsArrowAngleHover: 40deg;
$controlsArrowAngleActive: 36deg;

@mixin controlsArrowTransform( $angle ) {
	&:before {
		transform: translateX(($controlArrowSize - $controlArrowLength)*0.5) translateY(($controlArrowSize - $controlArrowThickness)*0.5) rotate( $angle );
	}

	&:after {
		transform: translateX(($controlArrowSize - $controlArrowLength)*0.5) translateY(($controlArrowSize - $controlArrowThickness)*0.5) rotate( -$angle );
	}
}

.reveal .controls {
	display: none;
	position: absolute;
	top: auto;
	bottom: var(--r-controls-spacing);
	right: var(--r-controls-spacing);
	left: auto;
	z-index: 11;
	color: #000;
	pointer-events: none;
	font-size: 10px;

	button {
		position: absolute;
		padding: 0;
		background-color: transparent;
		border: 0;
		outline: 0;
		cursor: pointer;
		color: currentColor;
		transform: scale(.9999);
		transition: color 0.2s ease,
					opacity 0.2s ease,
					transform 0.2s ease;
		z-index: 2; // above slides
		pointer-events: auto;
		font-size: inherit;

		visibility: hidden;
		opacity: 0;

		-webkit-appearance: none;
		-webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
	}

	.controls-arrow:before,
	.controls-arrow:after {
		content: '';
		position: absolute;
		top: 0;
		left: 0;
		width: $controlArrowLength;
		height: $controlArrowThickness;
		border-radius: $controlArrowThickness*0.5;
		background-color: currentColor;

		transition: all 0.15s ease, background-color 0.8s ease;
		transform-origin: math.div(floor(($controlArrowThickness*0.5)*10), 10) 50%;
		will-change: transform;
	}

	.controls-arrow {
		position: relative;
		width: $controlArrowSize;
		height: $controlArrowSize;

		@include controlsArrowTransform( $controlsArrowAngle );

		&:hover {
			@include controlsArrowTransform( $controlsArrowAngleHover );
		}

		&:active {
			@include controlsArrowTransform( $controlsArrowAngleActive );
		}
	}

	.navigate-left {
		right: $controlArrowSize + $controlArrowSpacing*2;
		bottom: $controlArrowSpacing + $controlArrowSize*0.5;
		transform: translateX( -10px );

		&.highlight {
			animation: bounce-left 2s 50 both ease-out;
		}
	}

	.navigate-right {
		right: 0;
		bottom: $controlArrowSpacing + $controlArrowSize*0.5;
		transform: translateX( 10px );

		.controls-arrow {
			transform: rotate( 180deg );
		}

		&.highlight {
			animation: bounce-right 2s 50 both ease-out;
		}
	}

	.navigate-up {
		right: $controlArrowSpacing + $controlArrowSize*0.5;
		bottom: $controlArrowSpacing*2 + $controlArrowSize;
		transform: translateY( -10px );

		.controls-arrow {
			transform: rotate( 90deg );
		}
	}

	.navigate-down {
		right: $controlArrowSpacing + $controlArrowSize*0.5;
		bottom: -$controlArrowSpacing;
		padding-bottom: $controlArrowSpacing;
		transform: translateY( 10px );

		.controls-arrow {
			transform: rotate( -90deg );
		}

		&.highlight {
			animation: bounce-down 2s 50 both ease-out;
		}
	}

	// Back arrow style: "faded":
	// Deemphasize backwards navigation arrows in favor of drawing
	// attention to forwards navigation
	&[data-controls-back-arrows="faded"] .navigate-up.enabled {
		opacity: 0.3;

		&:hover {
			opacity: 1;
		}
	}

	// Back arrow style: "hidden":
	// Never show arrows for backwards navigation
	&[data-controls-back-arrows="hidden"] .navigate-up.enabled {
		opacity: 0;
		visibility: hidden;
	}

	// Any control button that can be clicked is "enabled"
	.enabled {
		visibility: visible;
		opacity: 0.9;
		cursor: pointer;
		transform: none;
	}

	// Any control button that leads to showing or hiding
	// a fragment
	.enabled.fragmented {
		opacity: 0.5;
	}

	.enabled:hover,
	.enabled.fragmented:hover {
		opacity: 1;
	}
}

.reveal:not(.rtl) .controls {
	// Back arrow style: "faded":
	// Deemphasize left arrow
	&[data-controls-back-arrows="faded"] .navigate-left.enabled {
		opacity: 0.3;

		&:hover {
			opacity: 1;
		}
	}

	// Back arrow style: "hidden":
	// Never show left arrow
	&[data-controls-back-arrows="hidden"] .navigate-left.enabled {
		opacity: 0;
		visibility: hidden;
	}
}

.reveal.rtl .controls {
	// Back arrow style: "faded":
	// Deemphasize right arrow in RTL mode
	&[data-controls-back-arrows="faded"] .navigate-right.enabled  {
		opacity: 0.3;

		&:hover {
			opacity: 1;
		}
	}

	// Back arrow style: "hidden":
	// Never show right arrow in RTL mode
	&[data-controls-back-arrows="hidden"] .navigate-right.enabled {
		opacity: 0;
		visibility: hidden;
	}
}

.reveal[data-navigation-mode="linear"].has-horizontal-slides .navigate-up,
.reveal[data-navigation-mode="linear"].has-horizontal-slides .navigate-down {
	display: none;
}

// Adjust the layout when there are no vertical slides
.reveal[data-navigation-mode="linear"].has-horizontal-slides .navigate-left,
.reveal:not(.has-vertical-slides) .controls .navigate-left {
	bottom: $controlArrowSpacing;
	right: 0.5em + $controlArrowSpacing + $controlArrowSize;
}

.reveal[data-navigation-mode="linear"].has-horizontal-slides .navigate-right,
.reveal:not(.has-vertical-slides) .controls .navigate-right {
	bottom: $controlArrowSpacing;
	right: 0.5em;
}

// Adjust the layout when there are no horizontal slides
.reveal:not(.has-horizontal-slides) .controls .navigate-up {
	right: $controlArrowSpacing;
	bottom: $controlArrowSpacing + $controlArrowSize;
}
.reveal:not(.has-horizontal-slides) .controls .navigate-down {
	right: $controlArrowSpacing;
	bottom: 0.5em;
}

// Invert arrows based on background color
.reveal.has-dark-background .controls {
	color: #fff;
}
.reveal.has-light-background .controls {
	color: #000;
}

// Disable active states on touch devices
.reveal.no-hover .controls .controls-arrow:hover,
.reveal.no-hover .controls .controls-arrow:active {
	@include controlsArrowTransform( $controlsArrowAngle );
}

// Edge aligned controls layout
@media screen and (min-width: 500px) {

	.reveal-viewport {
		--r-controls-spacing: 0.8em;
	}

	.reveal .controls[data-controls-layout="edges"] {
		& {
			top: 0;
			right: 0;
			bottom: 0;
			left: 0;
		}

		.navigate-left,
		.navigate-right,
		.navigate-up,
		.navigate-down {
			bottom: auto;
			right: auto;
		}

		.navigate-left {
			top: 50%;
			left: var(--r-controls-spacing);
			margin-top: -$controlArrowSize*0.5;
		}

		.navigate-right {
			top: 50%;
			right: var(--r-controls-spacing);
			margin-top: -$controlArrowSize*0.5;
		}

		.navigate-up {
			top: var(--r-controls-spacing);
			left: 50%;
			margin-left: -$controlArrowSize*0.5;
		}

		.navigate-down {
			bottom: calc(var(--r-controls-spacing) - #{$controlArrowSpacing} + 0.3em);
			left: 50%;
			margin-left: -$controlArrowSize*0.5;
		}
	}

}


/*********************************************
 * PROGRESS BAR
 *********************************************/

.reveal .progress {
	position: absolute;
	display: none;
	height: 3px;
	width: 100%;
	bottom: 0;
	left: 0;
	z-index: 10;

	background-color: rgba( 0, 0, 0, 0.2 );
	color: #fff;
}
	.reveal .progress:after {
		content: '';
		display: block;
		position: absolute;
		height: 10px;
		width: 100%;
		top: -10px;
	}
	.reveal .progress span {
		display: block;
		height: 100%;
		width: 100%;

		background-color: currentColor;
		transition: transform 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
		transform-origin: 0 0;
		transform: scaleX(0);
	}

/*********************************************
 * SLIDE NUMBER
 *********************************************/

.reveal .slide-number {
	position: absolute;
	display: block;
	right: 8px;
	bottom: 8px;
	z-index: 31;
	font-family: Helvetica, sans-serif;
	font-size: 12px;
	line-height: 1;
	color: #fff;
	background-color: rgba( 0, 0, 0, 0.4 );
	padding: 5px;
}

.reveal .slide-number a {
	color: currentColor;
}

.reveal .slide-number-delimiter {
	margin: 0 3px;
}

/*********************************************
 * SLIDES
 *********************************************/

.reveal {
	position: relative;
	width: 100%;
	height: 100%;
	overflow: hidden;
	touch-action: pinch-zoom;
}

// Swiping on an embedded deck should not block page scrolling
.reveal.embedded {
	touch-action: pan-y;
}

.reveal .slides {
	position: absolute;
	width: 100%;
	height: 100%;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	margin: auto;
	pointer-events: none;

	overflow: visible;
	z-index: 1;
	text-align: center;
	perspective: 600px;
	perspective-origin: 50% 40%;
}

.reveal .slides>section {
	perspective: 600px;
}

.reveal .slides>section,
.reveal .slides>section>section {
	display: none;
	position: absolute;
	width: 100%;
	pointer-events: auto;

	z-index: 10;
	transform-style: flat;
	transition: transform-origin 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985),
				transform 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985),
				visibility 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985),
				opacity 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
}

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

/* Slide-specific transition speed overrides */
.reveal .slides section[data-transition-speed="fast"] {
	transition-duration: 400ms;
}
.reveal .slides section[data-transition-speed="slow"] {
	transition-duration: 1200ms;
}

.reveal .slides>section.stack {
	padding-top: 0;
	padding-bottom: 0;
	pointer-events: none;
	height: 100%;
}

.reveal .slides>section.present,
.reveal .slides>section>section.present {
	display: block;
	z-index: 11;
	opacity: 1;
}

.reveal .slides>section:empty,
.reveal .slides>section>section:empty,
.reveal .slides>section[data-background-interactive],
.reveal .slides>section>section[data-background-interactive] {
	pointer-events: none;
}

.reveal.center,
.reveal.center .slides,
.reveal.center .slides section {
	min-height: 0 !important;
}

/* Don't allow interaction with invisible slides */
.reveal .slides>section:not(.present),
.reveal .slides>section>section:not(.present) {
	pointer-events: none;
}

.reveal.overview .slides>section,
.reveal.overview .slides>section>section {
	pointer-events: auto;
}

.reveal .slides>section.past,
.reveal .slides>section.future,
.reveal .slides>section.past>section,
.reveal .slides>section.future>section,
.reveal .slides>section>section.past,
.reveal .slides>section>section.future {
	opacity: 0;
}


/*********************************************
 * Mixins for readability of transitions
 *********************************************/

@mixin transition-global($style) {
	.reveal .slides section[data-transition=#{$style}],
	.reveal.#{$style} .slides section:not([data-transition]) {
		@content;
	}
}
@mixin transition-stack($style) {
	.reveal .slides section[data-transition=#{$style}].stack,
	.reveal.#{$style} .slides section.stack {
		@content;
	}
}
@mixin transition-horizontal-past($style) {
	.reveal .slides>section[data-transition=#{$style}].past,
	.reveal .slides>section[data-transition~=#{$style}-out].past,
	.reveal.#{$style} .slides>section:not([data-transition]).past {
		@content;
	}
}
@mixin transition-horizontal-future($style) {
	.reveal .slides>section[data-transition=#{$style}].future,
	.reveal .slides>section[data-transition~=#{$style}-in].future,
	.reveal.#{$style} .slides>section:not([data-transition]).future {
		@content;
	}
}

@mixin transition-vertical-past($style) {
	.reveal .slides>section>section[data-transition=#{$style}].past,
	.reveal .slides>section>section[data-transition~=#{$style}-out].past,
	.reveal.#{$style} .slides>section>section:not([data-transition]).past {
		@content;
	}
}
@mixin transition-vertical-future($style) {
	.reveal .slides>section>section[data-transition=#{$style}].future,
	.reveal .slides>section>section[data-transition~=#{$style}-in].future,
	.reveal.#{$style} .slides>section>section:not([data-transition]).future {
		@content;
	}
}

/*********************************************
 * SLIDE TRANSITION
 * Aliased 'linear' for backwards compatibility
 *********************************************/

@each $stylename in slide, linear {
	@include transition-horizontal-past(#{$stylename}) {
		transform: translate(-150%, 0);
	}
	@include transition-horizontal-future(#{$stylename}) {
		transform: translate(150%, 0);
	}
	@include transition-vertical-past(#{$stylename}) {
		transform: translate(0, -150%);
	}
	@include transition-vertical-future(#{$stylename}) {
		transform: translate(0, 150%);
	}
}

/*********************************************
 * CONVEX TRANSITION
 * Aliased 'default' for backwards compatibility
 *********************************************/

@each $stylename in default, convex {
	@include transition-stack(#{$stylename}) {
		transform-style: preserve-3d;
	}

	@include transition-horizontal-past(#{$stylename}) {
		transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
	}
	@include transition-horizontal-future(#{$stylename}) {
		transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
	}
	@include transition-vertical-past(#{$stylename}) {
		transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0);
	}
	@include transition-vertical-future(#{$stylename}) {
		transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0);
	}
}

/*********************************************
 * CONCAVE TRANSITION
 *********************************************/

@include transition-stack(concave) {
	transform-style: preserve-3d;
}

@include transition-horizontal-past(concave) {
	transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
}
@include transition-horizontal-future(concave) {
	transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
}
@include transition-vertical-past(concave) {
	transform: translate3d(0, -80%, 0) rotateX(-70deg) translate3d(0, -80%, 0);
}
@include transition-vertical-future(concave) {
	transform: translate3d(0, 80%, 0) rotateX(70deg) translate3d(0, 80%, 0);
}


/*********************************************
 * ZOOM TRANSITION
 *********************************************/

@include transition-global(zoom) {
	transition-timing-function: ease;
}
@include transition-horizontal-past(zoom) {
	visibility: hidden;
	transform: scale(16);
}
@include transition-horizontal-future(zoom) {
	visibility: hidden;
	transform: scale(0.2);
}
@include transition-vertical-past(zoom) {
	transform: scale(16);
}
@include transition-vertical-future(zoom) {
	transform: scale(0.2);
}


/*********************************************
 * CUBE TRANSITION
 *
 * WARNING:
 * this is deprecated and will be removed in a
 * future version.
 *********************************************/

.reveal.cube .slides {
	perspective: 1300px;
}

.reveal.cube .slides section {
	padding: 30px;
	min-height: 700px;
	backface-visibility: hidden;
	box-sizing: border-box;
	transform-style: preserve-3d;
}
	.reveal.center.cube .slides section {
		min-height: 0;
	}
	.reveal.cube .slides section:not(.stack):before {
		content: '';
		position: absolute;
		display: block;
		width: 100%;
		height: 100%;
		left: 0;
		top: 0;
		background: rgba(0,0,0,0.1);
		border-radius: 4px;
		transform: translateZ( -20px );
	}
	.reveal.cube .slides section:not(.stack):after {
		content: '';
		position: absolute;
		display: block;
		width: 90%;
		height: 30px;
		left: 5%;
		bottom: 0;
		background: none;
		z-index: 1;

		border-radius: 4px;
		box-shadow: 0px 95px 25px rgba(0,0,0,0.2);
		transform: translateZ(-90px) rotateX( 65deg );
	}

.reveal.cube .slides>section.stack {
	padding: 0;
	background: none;
}

.reveal.cube .slides>section.past {
	transform-origin: 100% 0%;
	transform: translate3d(-100%, 0, 0) rotateY(-90deg);
}

.reveal.cube .slides>section.future {
	transform-origin: 0% 0%;
	transform: translate3d(100%, 0, 0) rotateY(90deg);
}

.reveal.cube .slides>section>section.past {
	transform-origin: 0% 100%;
	transform: translate3d(0, -100%, 0) rotateX(90deg);
}

.reveal.cube .slides>section>section.future {
	transform-origin: 0% 0%;
	transform: translate3d(0, 100%, 0) rotateX(-90deg);
}


/*********************************************
 * PAGE TRANSITION
 *
 * WARNING:
 * this is deprecated and will be removed in a
 * future version.
 *********************************************/

.reveal.page .slides {
	perspective-origin: 0% 50%;
	perspective: 3000px;
}

.reveal.page .slides section {
	padding: 30px;
	min-height: 700px;
	box-sizing: border-box;
	transform-style: preserve-3d;
}
	.reveal.page .slides section.past {
		z-index: 12;
	}
	.reveal.page .slides section:not(.stack):before {
		content: '';
		position: absolute;
		display: block;
		width: 100%;
		height: 100%;
		left: 0;
		top: 0;
		background: rgba(0,0,0,0.1);
		transform: translateZ( -20px );
	}
	.reveal.page .slides section:not(.stack):after {
		content: '';
		position: absolute;
		display: block;
		width: 90%;
		height: 30px;
		left: 5%;
		bottom: 0;
		background: none;
		z-index: 1;

		border-radius: 4px;
		box-shadow: 0px 95px 25px rgba(0,0,0,0.2);

		-webkit-transform: translateZ(-90px) rotateX( 65deg );
	}