/*  So you like the style of impress.js demo?
 *  Or maybe you are just curious how it was done?
 *
 *  You couldn't find a better place to find out!
 *
 *  Welcome to the stylesheet impress.js demo presentation.
 *
 *  Please remember that it is not meant to be a part of impress.js and is
 *  not required by impress.js.
 *  I expect that anyone creating a presentation for impress.js would create
 *  their own set of styles.
 *
 *  But feel free to read through it and learn how to get the most of what
 *  impress.js provides.
 *
 *  And let me be your guide.
 *
 *  Shall we begin? */
* {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
  display: block;
}

body {
  line-height: 1;
}

ol, ul {
  list-style: none;
}

blockquote, q {
  quotes: none;
}

blockquote:before, blockquote:after {
  content: "";
  content: none;
}

q:before, q:after {
  content: "";
  content: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/*  Now here is when interesting things start to appear.
 *
 *  We set up <body> styles with default font and nice gradient in the background.
 *  And yes, there is a lot of repetition there because of -prefixes but we don't
 *  want to leave anybody behind. */
body {
  color: white;
  font-family: "Trebuchet MS", sans-serif;
  min-height: 740px;
  background-color: #0f0f0f;
  background: -webkit-gradient(radial, 50% 50%, 0, 50% 50%, 100, color-stop(0%, #282828), color-stop(100%, #141414));
  background: -webkit-radial-gradient(#282828, #141414);
  background: -moz-radial-gradient(#282828, #141414);
  background: -o-radial-gradient(#282828, #141414);
  background: radial-gradient(#282828, #141414);
}

b,
strong {
  font-weight: bold;
}

i,
em {
  font-style: italic;
}

a {
  color: inherit;
  text-decoration: none;
  padding: 0.3em 0.8em;
  background: rgba(255, 255, 255, 0.06);
  text-shadow: -1px -1px 2px rgba(100, 100, 100, 0.9);
  border-radius: 0.2em;
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  -ms-transition: 0.5s;
  -o-transition: 0.5s;
  transition: 0.5s;
}
a:hover, a:focus {
  background: white;
  text-shadow: -1px -1px 2px rgba(100, 100, 100, 0.5);
}

.fallback-message {
  font-family: sans-serif;
  line-height: 1.3;
  width: 780px;
  padding: 10px 10px 0;
  margin: 20px auto;
  border: 1px solid #e4c652;
  border-radius: 10px;
  background: #eedc94;
}
.fallback-message p {
  margin-bottom: 10px;
}

.impress-supported .fallback-message {
  display: none;
}

.step {
  text-align: center;
  position: relative;
  width: 1000px;
  padding: 40px;
  margin: 20px auto;
  font-size: 48px;
  line-height: 1.5;
}
.step code {
  font-size: 160%;
  display: inline-block;
  opacity: 0;
  position: relative;
  margin-top: 100px;
}
.step.present code {
  -webkit-transition: opacity 2s;
  -moz-transition: opacity 2s;
  -o-transition: opacity 2s;
  transition: opacity 2s;
  opacity: 1;
}
.step.past code {
  -webkit-transition: opacity 0.2s;
  -moz-transition: opacity 0.2s;
  -o-transition: opacity 0.2s;
  transition: opacity 0.2s;
  opacity: 0;
}

.impress-enabled .step {
  margin: 0;
  opacity: 0.2;
  -webkit-transition: opacity 1s;
  -moz-transition: opacity 1s;
  -o-transition: opacity 1s;
  transition: opacity 1s;
}
.impress-enabled .step.active {
  opacity: 1;
}

#start h1 {
  font-size: 140px;
  font-family: "Helvetica", sans-serif;
}

#structure {
  opacity: 0;
}
#structure.present {
  -webkit-transition: opacity 1s;
  -moz-transition: opacity 1s;
  -o-transition: opacity 1s;
  transition: opacity 1s;
  opacity: 1;
}
#structure.past {
  opacity: 1;
}
#structure ol {
  display: inline-block;
  list-style-type: decimal;
  text-align: left;
}

svg {
  display: inline-block;
  width: 200px;
  height: 200px;
}
svg circle,
svg rect,
svg ellipse,
svg line,
svg polygon {
  fill: white;
}
svg line,
svg polyline,
svg path {
  stroke: white;
  stroke-width: 10px;
}
svg polyline {
  fill: none;
}

#example {
  width: 900px;
  height: 600px;
}

#sources li {
  line-height: 2.8;
}

#twitter img {
  vertical-align: middle;
  height: 100px;
  display: inline-block;
  margin-right: 40px;
}
#twitter h1 {
  vertical-align: middle;
  font-size: 100px;
  display: inline;
}

#title {
  padding: 0;
}
#title .try {
  font-size: 64px;
  position: absolute;
  top: -0.5em;
  left: 1.5em;
  -webkit-transform: translateZ(20px);
  -moz-transform: translateZ(20px);
  -ms-transform: translateZ(20px);
  -o-transform: translateZ(20px);
  transform: translateZ(20px);
}
#title h1 {
  font-size: 190px;
  -webkit-transform: translateZ(50px);
  -moz-transform: translateZ(50px);
  -ms-transform: translateZ(50px);
  -o-transform: translateZ(50px);
  transform: translateZ(50px);
}
#title .footnote {
  font-size: 32px;
}

#big {
  width: 600px;
  text-align: center;
  font-size: 60px;
  line-height: 1;
}
#big b {
  display: block;
  font-size: 250px;
  line-height: 250px;
}
#big .thoughts {
  font-size: 90px;
  line-height: 150px;
}

#tiny {
  width: 500px;
  text-align: center;
}

#ing {
  width: 500px;
}
#ing b {
  display: inline-block;
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  -o-transition: 0.5s;
  transition: 0.5s;
}
#ing.present .positioning {
  -webkit-transform: translateY(-10px);
  -moz-transform: translateY(-10px);
  -ms-transform: translateY(-10px);
  -o-transform: translateY(-10px);
  transform: translateY(-10px);
}
#ing.present .rotating {
  -webkit-transform: rotate(-10deg);
  -moz-transform: rotate(-10deg);
  -ms-transform: rotate(-10deg);
  -o-transform: rotate(-10deg);
  transform: rotate(-10deg);
  -webkit-transition-delay: 0.25s;
  -moz-transition-delay: 0.25s;
  -o-transition-delay: 0.25s;
  transition-delay: 0.25s;
}
#ing.present .scaling {
  -webkit-transform: scale(0.7);
  -moz-transform: scale(0.7);
  -ms-transform: scale(0.7);
  -o-transform: scale(0.7);
  transform: scale(0.7);
  -webkit-transition-delay: 0.5s;
  -moz-transition-delay: 0.5s;
  -o-transition-delay: 0.5s;
  transition-delay: 0.5s;
}

/*  ... so we define display to `inline-block` to enable transforms and
 *  transition duration to 0.5s ... */
/*  ... and we want 'positioning` word to move up a bit when the step gets
 *  `present` class ... */
/*  ... 'rotating' to rotate quater of a second later ... */
/*  ... and 'scaling' to scale down after another quater of a second. */
/*  The 'imagination' step is again some boring font-sizing. */
#imagination {
  width: 600px;
}
#imagination .imagination {
  font-size: 78px;
}

/*  There is nothing really special about 'use the source, Luke' step, too,
 *  except maybe of the Yoda background.
 *
 *  As you can see below I've 'hard-coded' it in data URL.
 *  That's not the best way to serve images, but because that's just this one
 *  I decided it will be OK to have it this way.
 *
 *  Just make sure you don't blindly copy this approach. */
#source {
  width: 700px;
  padding-bottom: 300px;
  /* Yoda Icon :: Pixel Art from Star Wars http://www.pixeljoint.com/pixelart/1423.htm */
  background-image: url(data:image/png;base64,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);
  background-position: bottom right;
  background-repeat: no-repeat;
}
#source q {
  font-size: 60px;
}

/*  And the "it's in 3D" step again brings some 3D typography - just for fun.
 *
 *  Because we want to position <span> elements in 3D we set transform-style to
 *  `preserve-3d` on the paragraph.
 *  It is not needed by webkit browsers, but it is in Firefox. It's hard to say
 *  which behaviour is correct as 3D transforms spec is not very clear about it. */
#its-in-3d p {
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  /* Y U need this Firefox?! */
  -ms-transform-style: preserve-3d;
  -o-transform-style: preserve-3d;
  transform-style: preserve-3d;
}
#its-in-3d span, #its-in-3d b {
  display: inline-block;
  -webkit-transform: translateZ(40px);
  -moz-transform: translateZ(40px);
  -ms-transform: translateZ(40px);
  -o-transform: translateZ(40px);
  transform: translateZ(40px);
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  -ms-transition: 0.5s;
  -o-transition: 0.5s;
  transition: 0.5s;
}
#its-in-3d .have {
  -webkit-transform: translateZ(-40px);
  -moz-transform: translateZ(-40px);
  -ms-transform: translateZ(-40px);
  -o-transform: translateZ(-40px);
  transform: translateZ(-40px);
}
#its-in-3d .you {
  -webkit-transform: translateZ(20px);
  -moz-transform: translateZ(20px);
  -ms-transform: translateZ(20px);
  -o-transform: translateZ(20px);
  transform: translateZ(20px);
}
#its-in-3d .noticed {
  -webkit-transform: translateZ(-40px);
  -moz-transform: translateZ(-40px);
  -ms-transform: translateZ(-40px);
  -o-transform: translateZ(-40px);
  transform: translateZ(-40px);
}
#its-in-3d .its {
  -webkit-transform: translateZ(60px);
  -moz-transform: translateZ(60px);
  -ms-transform: translateZ(60px);
  -o-transform: translateZ(60px);
  transform: translateZ(60px);
}
#its-in-3d .in {
  -webkit-transform: translateZ(-10px);
  -moz-transform: translateZ(-10px);
  -ms-transform: translateZ(-10px);
  -o-transform: translateZ(-10px);
  transform: translateZ(-10px);
}
#its-in-3d .footnote {
  font-size: 32px;
  -webkit-transform: translateZ(-10px);
  -moz-transform: translateZ(-10px);
  -ms-transform: translateZ(-10px);
  -o-transform: translateZ(-10px);
  transform: translateZ(-10px);
}
#its-in-3d.present span, #its-in-3d.present b {
  -webkit-transform: translateZ(0px);
  -moz-transform: translateZ(0px);
  -ms-transform: translateZ(0px);
  -o-transform: translateZ(0px);
  transform: translateZ(0px);
}

/*  Below we position each word separately along Z axis and we want it to transition
 *  to default position in 0.5s when the step gets `present` class.
 *
 *  Quite a simple idea, but lot's of styles and prefixes. */
/*  The last step is an overview.
 *  There is no content in it, so we make sure it's not visible because we want
 *  to be able to click on other steps. */
#overview {
  display: none;
}

/*  We also make other steps visible and give them a pointer cursor using the
 *  `impress-on-` class. */
.impress-on-overview .step {
  opacity: 1;
  cursor: pointer;
}

/*  Now, when we have all the steps styled let's give users a hint how to navigate
 *  around the presentation.
 *
 *  The best way to do this would be to use JavaScript, show a delayed hint for a
 *  first time users, then hide it and store a status in cookie or localStorage...
 *
 *  But I wanted to have some CSS fun and avoid additional scripting...
 *
 *  Let me explain it first, so maybe the transition magic will be more readable
 *  when you read the code.
 *
 *  First of all I wanted the hint to appear only when user is idle for a while.
 *  You can't detect the 'idle' state in CSS, but I delayed a appearing of the
 *  hint by 5s using transition-delay.
 *
 *  You also can't detect in CSS if the user is a first-time visitor, so I had to
 *  make an assumption that I'll only show the hint on the first step. And when
 *  the step is changed hide the hint, because I can assume that user already
 *  knows how to navigate.
 *
 *  To summarize it - hint is shown when the user is on the first step for longer
 *  than 5 seconds.
 *
 *  The other problem I had was caused by the fact that I wanted the hint to fade
 *  in and out. It can be easily achieved by transitioning the opacity property.
 *  But that also meant that the hint was always on the screen, even if totally
 *  transparent. It covered part of the screen and you couldn't correctly clicked
 *  through it.
 *  Unfortunately you cannot transition between display `block` and `none` in pure
 *  CSS, so I needed a way to not only fade out the hint but also move it out of
 *  the screen.
 *
 *  I solved this problem by positioning the hint below the bottom of the screen
 *  with CSS transform and moving it up to show it. But I also didn't want this move
 *  to be visible. I wanted the hint only to fade in and out visually, so I delayed
 *  the fade in transition, so it starts when the hint is already in its correct
 *  position on the screen.
 *
 *  I know, it sounds complicated ... maybe it would be easier with the code? */
.hint {
  /*  We hide the hint until presentation is started and from browsers not supporting
   *  impress.js, as they will have a linear scrollable view ... */
  display: none;
  /*  ... and give it some fixed position and nice styles. */
  position: fixed;
  left: 0;
  right: 0;
  bottom: 200px;
  background: rgba(0, 0, 0, 0.5);
  color: #eeeeee;
  text-align: center;
  font-size: 50px;
  padding: 20px;
  z-index: 100;
  /*  By default we don't want the hint to be visible, so we make it transparent ... */
  opacity: 0;
  /*  ... and position it below the bottom of the screen (relative to it's fixed position) */
  -webkit-transform: translateY(400px);
  -moz-transform: translateY(400px);
  -ms-transform: translateY(400px);
  -o-transform: translateY(400px);
  transform: translateY(400px);
  /*  Now let's imagine that the hint is visible and we want to fade it out and move out
   *  of the screen.
   *
   *  So we define the transition on the opacity property with 1s duration and another
   *  transition on transform property delayed by 1s so it will happen after the fade out
   *  on opacity finished.
   *
   *  This way user will not see the hint moving down. */
  -webkit-transition: opacity 1s, -webkit-transform 0.5s 1s;
  -moz-transition: opacity 1s, -moz-transform 0.5s 1s;
  -ms-transition: opacity 1s, -ms-transform 0.5s 1s;
  -o-transition: opacity 1s, -o-transform 0.5s 1s;
  transition: opacity 1s, transform 0.5s 1s;
}

/*  Now we 'enable' the hint when presentation is initialized ... */
/*  ... and we will show it when the first step (with id 'bored') is active. */
.impress-on-bored .hint {
  /*  We remove the transparency and position the hint in its default fixed
   *  position. */
  opacity: 1;
  -webkit-transform: translateY(0px);
  -moz-transform: translateY(0px);
  -ms-transform: translateY(0px);
  -o-transform: translateY(0px);
  transform: translateY(0px);
  /*  Now for fade in transition we have the oposite situation from the one
   *  above.
   *
   *  First after 4.5s delay we animate the transform property to move the hint
   *  into its correct position and after that we fade it in with opacity
   *  transition. */
  -webkit-transition: opacity 1s 5s, -webkit-transform 0.5s 4.5s;
  -moz-transition: opacity 1s 5s, -moz-transform 0.5s 4.5s;
  -ms-transition: opacity 1s 5s, -ms-transform 0.5s 4.5s;
  -o-transition: opacity 1s 5s, -o-transform 0.5s 4.5s;
  transition: opacity 1s 5s, transform 0.5s 4.5s;
}

/*  And as the last thing there is a workaround for quite strange bug.
 *  It happens a lot in Chrome. I don't remember if I've seen it in Firefox.
 *
 *  Sometimes the element positioned in 3D (especially when it's moved back
 *  along Z axis) is not clickable, because it falls 'behind' the <body>
 *  element.
 *
 *  To prevent this, I decided to make <body> non clickable by setting
 *  pointer-events property to `none` value.
 *  Value if this property is inherited, so to make everything else clickable
 *  I bring it back on the #impress element.
 *
 *  If you want to know more about `pointer-events` here are some docs:
 *  https://developer.mozilla.org/en/CSS/pointer-events
 *
 *  There is one very important thing to notice about this workaround - it makes
 *  everything 'unclickable' except what's in #impress element.
 *
 *  So use it wisely ... or don't use at all. */
.impress-enabled {
  pointer-events: none;
}
.impress-enabled #impress {
  pointer-events: auto;
  /*  There is one funny thing I just realized.
   *
   *  Thanks to this workaround above everything except #impress element is invisible
   *  for click events. That means that the hint element is also not clickable.
   *  So basically all of this transforms and delayed transitions trickery was probably
   *  not needed at all...
   *
   *  But it was fun to learn about it, wasn't it? */
  /*  That's all I have for you in this file.
   *  Thanks for reading. I hope you enjoyed it at least as much as I enjoyed writing it
   *  for you. */
}
