@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-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 0.2s 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(0.9999);
    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(0.26, 0.86, 0.44, 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;
}

// ... unless we're on a vertical slide
.reveal.embedded.is-vertical-slide {
  touch-action: none;
}

.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(0.26, 0.86, 0.44, 0.985),
    transform 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985),
    visibility 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985),
    opacity 800ms cubic-bezier(0.26, 0.86, 0.44, 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);
}

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

.reveal.page .slides > section.past {
  transform-origin: 0% 0%;
  transform: translate3d(-40%, 0, 0) rotateY(-80deg);
}

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

.reveal.page .slides > section > section.past {
  transform-origin: 0% 0%;
  transform: translate3d(0, -40%, 0) rotateX(80deg);
}

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

/*********************************************
 * FADE TRANSITION
 *********************************************/

.reveal .slides section[data-transition="fade"],
.reveal.fade .slides section:not([data-transition]),
.reveal.fade .slides > section > section:not([data-transition]) {
  transform: none;
  transition: opacity 0.5s;
}

.reveal.fade.overview .slides section,
.reveal.fade.overview .slides > section > section {
  transition: none;
}

/*********************************************
 * NO TRANSITION
 *********************************************/

@include transition-global(none) {
  transform: none;
  transition: none;
}

/*********************************************
 * PAUSED MODE
 *********************************************/

.reveal .pause-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  visibility: hidden;
  opacity: 0;
  z-index: 100;
  transition: all 1s ease;
}

.reveal .pause-overlay .resume-button {
  position: absolute;
  bottom: 20px;
  right: 20px;
  color: #ccc;
  border-radius: 2px;
  padding: 6px 14px;
  border: 2px solid #ccc;
  font-size: 16px;
  background: transparent;
  cursor: pointer;

  &:hover {
    color: #fff;
    border-color: #fff;
  }
}

.reveal.paused .pause-overlay {
  visibility: visible;
  opacity: 1;
}

/*********************************************
 * FALLBACK
 *********************************************/

.reveal .no-transition,
.reveal .no-transition *,
.reveal .slides.disable-slide-transitions section {
  transition: none !important;
}

.reveal .slides.disable-slide-transitions section {
  transform: none !important;
}

/*********************************************
 * PER-SLIDE BACKGROUNDS
 *********************************************/

.reveal .backgrounds {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  perspective: 600px;
}
.reveal .slide-background {
  display: none;
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;

  background-color: rgba(0, 0, 0, 0);

  transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
}

.reveal .slide-background-content {
  position: absolute;
  width: 100%;
  height: 100%;

  background-position: 50% 50%;
  background-repeat: no-repeat;
  background-size: cover;
}

.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:not([data-background-transition]),
.reveal > .backgrounds .slide-background[data-background-transition="none"] {
  transition: none;
}

/* Slide */
.reveal[data-background-transition="slide"]
  > .backgrounds
  .slide-background:not([data-background-transition]),
.reveal > .backgrounds .slide-background[data-background-transition="slide"] {
  opacity: 1;
}
.reveal[data-background-transition="slide"]
  > .backgrounds
  .slide-background.past:not([data-background-transition]),
.reveal
  > .backgrounds
  .slide-background.past[data-background-transition="slide"] {
  transform: translate(-100%, 0);
}
.reveal[data-background-transition="slide"]
  > .backgrounds
  .slide-background.future:not([data-background-transition]),
.reveal
  > .backgrounds
  .slide-background.future[data-background-transition="slide"] {
  transform: translate(100%, 0);
}

.reveal[data-background-transition="slide"]
  > .backgrounds
  .slide-background
  > .slide-background.past:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.reveal > .backgrounds .slide-background[data-background-transition="zoom"] {
  transition-timing-function: ease;
}

.reveal[data-background-transition="zoom"]
  > .backgrounds
  .slide-background.past:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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:not([data-background-transition]),
.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;
}

/*********************************************
 * AUTO ANIMATE
 *********************************************/

.reveal [data-auto-animate-target^="unmatched"] {
  will-change: opacity;
}

.reveal
  section[data-auto-animate]:not(.stack):not([data-auto-animate="running"])
  [data-auto-animate-target^="unmatched"] {
  opacity: 0;
}

/*********************************************
 * 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 {
  transform-origin: 100% 0;
}

/*********************************************
 * 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;
}

/*********************************************
 * OVERLAY FOR LINK PREVIEWS AND HELP
 *********************************************/

$overlayHeaderHeight: 40px;
$overlayHeaderPadding: 5px;

.reveal > .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(6px);
  transition: all 0.3s ease;
}

.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%;
  padding: $overlayHeaderPadding;
  z-index: 2;
  box-sizing: border-box;
}
.reveal > .overlay header a {
  display: inline-block;
  width: $overlayHeaderHeight;
  height: $overlayHeaderHeight;
  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: $overlayHeaderHeight + $overlayHeaderPadding * 2;
  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: absolute;
  left: 15px;
  bottom: 20px;
  z-index: 30;
  cursor: pointer;
  transition: all 400ms ease;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

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

/*********************************************
 * CODE HIGHLIGHTING
 *********************************************/

.reveal .hljs {
  min-height: 100%;
}

.reveal .hljs table {
  margin: initial;
}

.reveal .hljs-ln-code,
.reveal .hljs-ln-numbers {
  padding: 0;
  border: 0;
}

.reveal .hljs-ln-numbers {
  opacity: 0.6;
  padding-right: 0.75em;
  text-align: right;
  vertical-align: top;
}

.reveal .hljs.has-highlights tr:not(.highlight-line) {
  opacity: 0.4;
}

.reveal .hljs.has-highlights.fragment {
  transition: all 0.2s ease;
}

.reveal .hljs:not(:first-child).fragment {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
}

.reveal pre[data-auto-animate-target] {
  overflow: hidden;
}
.reveal pre[data-auto-animate-target] code {
  height: 100%;
}

/*********************************************
 * 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
 *********************************************/

$notesWidthPercent: 25%;

// 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: math.div($notesWidthPercent, (1 - math.div($notesWidthPercent, 100))) *
    1%;
  height: 100%;
  top: 0;
  left: 100%;
  padding: 14px 18px 14px 18px;
  z-index: 1;
  font-size: 18px;
  line-height: 1.4;
  border: 1px solid rgba(0, 0, 0, 0.05);
  color: #222;
  background-color: #f5f5f5;
  overflow: auto;
  box-sizing: border-box;
  text-align: left;
  font-family: Helvetica, sans-serif;
  -webkit-overflow-scrolling: touch;

  .notes-placeholder {
    color: #ccc;
    font-style: italic;
  }

  &:focus {
    outline: none;
  }

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

.reveal.show-notes {
  max-width: 100% - $notesWidthPercent;
  overflow: visible;
}

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

@media screen and (min-width: 1600px) {
  .reveal .speaker-notes {
    font-size: 20px;
  }
}

@media screen and (max-width: 1024px) {
  .reveal.show-notes {
    border-left: 0;
    max-width: none;
    max-height: 70%;
    max-height: 70vh;
    overflow: visible;
  }

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

@media screen and (max-width: 600px) {
  .reveal.show-notes {
    max-height: 60%;
    max-height: 60vh;
  }

  .reveal.show-notes .speaker-notes {
    top: 100%;
    height: 40vh;
  }

  .reveal .speaker-notes {
    font-size: 14px;
  }
}

/*********************************************
 * JUMP-TO-SLIDE COMPONENT
 *********************************************/

.reveal .jump-to-slide {
  position: absolute;
  top: 15px;
  left: 15px;
  z-index: 30;
  font-size: 32px;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

.reveal .jump-to-slide-input {
  background: transparent;
  padding: 8px;
  font-size: inherit;
  color: currentColor;
  border: 0;
}
.reveal .jump-to-slide-input::placeholder {
  color: currentColor;
  opacity: 0.5;
}

.reveal.has-dark-background .jump-to-slide-input {
  color: #fff;
}
.reveal.has-light-background .jump-to-slide-input {
  color: #222;
}

.reveal .jump-to-slide-input:focus {
  outline: none;
}

/*********************************************
 * 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;
}

/*********************************************
 * SCROLL VIEW
 *********************************************/
.reveal-viewport.loading-scroll-mode {
  visibility: hidden;
}

.reveal-viewport.reveal-scroll {
  & {
    margin: 0 auto;
    overflow: auto;
    overflow-x: hidden;
    overflow-y: auto;
    z-index: 1;

    --r-scrollbar-width: 7px;
    --r-scrollbar-trigger-size: 5px;
    --r-controls-spacing: 8px;
  }

  @media screen and (max-width: 500px) {
    --r-scrollbar-width: 3px;
    --r-scrollbar-trigger-size: 3px;
  }

  .controls,
  .progress,
  .playback,
  .backgrounds,
  .slide-number,
  .speaker-notes {
    display: none !important;
  }

  .overlay,
  .pause-overlay {
    position: fixed;
  }

  .reveal {
    overflow: visible;
    touch-action: manipulation;
  }

  .slides {
    position: static;
    pointer-events: initial;

    left: auto;
    top: auto;
    width: 100% !important;
    margin: 0;
    padding: 0;

    overflow: visible;
    display: block;

    perspective: none;
    perspective-origin: 50% 50%;
  }

  .scroll-page {
    position: relative;
    width: 100%;
    height: calc(var(--page-height) + var(--page-scroll-padding));
    z-index: 1;
    overflow: visible;
  }

  .scroll-page-sticky {
    position: sticky;
    height: var(--page-height);
    top: 0px;
  }

  .scroll-page-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
  }

  .scroll-page section {
    visibility: visible !important;
    display: block !important;
    position: absolute !important;
    width: var(--slide-width) !important;
    height: var(--slide-height) !important;
    top: 50% !important;
    left: 50% !important;
    opacity: 1 !important;
    transform: scale(var(--slide-scale)) translate(-50%, -50%) !important;
    transform-style: flat !important;
    transform-origin: 0 0 !important;
  }

  .slide-background {
    display: block !important;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: auto !important;
    visibility: visible;
    opacity: 1;
    touch-action: manipulation;
  }
}

// Chromium
.reveal-viewport.reveal-scroll[data-scrollbar="true"]::-webkit-scrollbar,
.reveal-viewport.reveal-scroll[data-scrollbar="auto"]::-webkit-scrollbar {
  display: none;
}

// Firefox
.reveal-viewport.reveal-scroll[data-scrollbar="true"],
.reveal-viewport.reveal-scroll[data-scrollbar="auto"] {
  scrollbar-width: none;
}

.reveal.has-dark-background,
.reveal-viewport.has-dark-background {
  --r-overlay-element-bg-color: 240, 240, 240;
  --r-overlay-element-fg-color: 0, 0, 0;
}
.reveal.has-light-background,
.reveal-viewport.has-light-background {
  --r-overlay-element-bg-color: 0, 0, 0;
  --r-overlay-element-fg-color: 240, 240, 240;
}

.reveal-viewport.reveal-scroll .scrollbar {
  position: sticky;
  top: 50%;
  z-index: 20;
  opacity: 0;
  transition: all 0.3s ease;

  &.visible,
  &:hover {
    opacity: 1;
  }

  .scrollbar-inner {
    position: absolute;
    width: var(--r-scrollbar-width);
    height: calc(var(--viewport-height) - var(--r-controls-spacing) * 2);
    right: var(--r-controls-spacing);
    top: 0;
    transform: translateY(-50%);
    border-radius: var(--r-scrollbar-width);
    z-index: 10;
  }

  .scrollbar-playhead {
    position: absolute;
    width: var(--r-scrollbar-width);
    height: var(--r-scrollbar-width);
    top: 0;
    left: 0;
    border-radius: var(--r-scrollbar-width);
    background-color: rgba(var(--r-overlay-element-bg-color), 1);
    z-index: 11;
    transition: background-color 0.2s ease;
  }

  .scrollbar-slide {
    position: absolute;
    width: 100%;
    background-color: rgba(var(--r-overlay-element-bg-color), 0.2);
    box-shadow: 0 0 0px 1px rgba(var(--r-overlay-element-fg-color), 0.1);
    border-radius: var(--r-scrollbar-width);
    transition: background-color 0.2s ease;
  }

  // Hit area
  .scrollbar-slide:after {
    content: "";
    position: absolute;
    width: 200%;
    height: 100%;
    top: 0;
    left: -50%;
    background: rgba(0, 0, 0, 0);
    z-index: -1;
  }

  .scrollbar-slide:hover,
  .scrollbar-slide.active {
    background-color: rgba(var(--r-overlay-element-bg-color), 0.4);
  }

  .scrollbar-trigger {
    position: absolute;
    width: 100%;
    transition: background-color 0.2s ease;
  }

  .scrollbar-slide.active.has-triggers {
    background-color: rgba(var(--r-overlay-element-bg-color), 0.4);
    z-index: 10;
  }

  .scrollbar-slide.active .scrollbar-trigger:after {
    content: "";
    position: absolute;
    width: var(--r-scrollbar-trigger-size);
    height: var(--r-scrollbar-trigger-size);
    border-radius: 20px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(var(--r-overlay-element-bg-color), 1);
    transition: transform 0.2s ease, opacity 0.2s ease;
    opacity: 0.4;
  }

  .scrollbar-slide.active .scrollbar-trigger.active:after,
  .scrollbar-slide.active .scrollbar-trigger.active ~ .scrollbar-trigger:after {
    opacity: 1;
  }

  .scrollbar-slide.active .scrollbar-trigger ~ .scrollbar-trigger.active:after {
    transform: translate(calc(var(--r-scrollbar-width) * -2), 0);
    background-color: rgba(var(--r-overlay-element-bg-color), 1);
  }
}

/*********************************************
 * PRINT STYLES
 *********************************************/

@import "print/pdf.scss";
@import "print/paper.scss";
