/* Traits */
@trait bgGradient(from, to, fallback) {
  background: $fallback;
  background-image: -webkit-gradient(linear, left top, left bottom, from($from), to($to));
  background-image: -webkit-linear-gradient(top, $from, $to);
  background-image:    -moz-linear-gradient(top, $from, $to);
  background-image:      -o-linear-gradient(top, $from, $to);
  background-image:         linear-gradient(top, $from, $to);
}

@trait borderRadius(leftTop, rightTop, default) {
  border-radius: $default;
  &:nth-child(even) {
    border-radius: $leftTop $rightTop;
  }
  &:nth-child(odd) {
    border-radius: $rightTop $leftTop;
  }
}

@trait textShadow(color, hOffset, vOffset, blurRadius) {
  text-shadow: $color $hOffset $vOffset $blurRadius;
}

@trait boxShadow(hOffset, vOffset, blurRadius, color) {
  -webkit-box-shadow: $hOffset $vOffset $blurRadius $color;
     -moz-box-shadow: $hOffset $vOffset $blurRadius $color;
          box-shadow: $hOffset $vOffset $blurRadius $color;
}

@trait insetBoxShadow(hOffset, vOffset, blurRadius, color) {
  -webkit-box-shadow: inset $hOffset $vOffset $blurRadius $color;
     -moz-box-shadow: inset $hOffset $vOffset $blurRadius $color;
          box-shadow: inset $hOffset $vOffset $blurRadius $color;
}

@trait textStroke(width, color) {
  -webkit-text-stroke: $width $color;
}

@trait columnCount(num) {
  -webkit-column-count: $num;
     -moz-column-count: $num;
          column-count: $num;
}

@trait columnComplex(count, gap, width, style, color) {
  @mixin columnCount($count);
  -webkit-column-gap: $gap;
  -webkit-column-rule: $width $style $color;
  -moz-column-gap: $gap;
  -moz-column-rule: $width $style $color;
  column-gap: $gap;
  column-rule: $width $style $color;
}

@trait boxSizing(value) {
  -webkit-box-sizing: $value;
     -moz-box-sizing: $value;
          box-sizing: $value;
}

@trait displayAsBox {
  display: -webkit-box;
  display: -moz-box;
  display: box;
}

@trait boxOrient(value) {
  -webkit-box-orient: $value;
     -moz-box-orient: $value;
          box-orient: $value;
}

@trait boxFlex(value) {
  -webkit-box-flex: $value;
     -moz-box-flex: $value;
          box-flex: $value;
}

@trait boxPack(value) {
  -webkit-box-pack: $value;
     -moz-box-pack: $value;
          box-pack: $value;
}

@trait boxAlign(value) {
  -webkit-box-align: $value;
     -moz-box-align: $value;
          box-align: $value;
}

@trait transitionSingle(prop, duration, timeFunc) {
  -webkit-transition: $prop $duration $timeFunc;
     -moz-transition: $prop $duration $timeFunc;
       -o-transition: $prop $duration $timeFunc;
          transition: $prop $duration $timeFunc;
}

@trait delayedTransition(prop, duration, timeFunc, delay) {
  -webkit-transition: $prop $duration $timeFunc $delay;
     -moz-transition: $prop $duration $timeFunc $delay;
       -o-transition: $prop $duration $timeFunc $delay;
          transition: $prop $duration $timeFunc $delay;
}

@trait transformTransition(duration, timeFunc) {
  -webkit-transition: -webkit-transform $duration $timeFunc;
     -moz-transition:    -moz-transform $duration $timeFunc;
       -o-transition:      -o-transform $duration $timeFunc;
          transition:         transform $duration $timeFunc;
}

@trait transformSingle(func, value) {
  -webkit-transform: $func($value);
     -moz-transform: $func($value);
       -o-transform: $func($value);
          transform: $func($value);
}

@trait transformTriple(func1, value1, func2, value2, func3, value3) {
  -webkit-transform: $func1($value1) $func2($value2) $func3($value3);
     -moz-transform: $func1($value1) $func2($value2) $func3($value3);
       -o-transform: $func1($value1) $func2($value2) $func3($value3);
          transform: $func1($value1) $func2($value2) $func3($value3);
}

/* Selectors */
body, html, #flex-container, .slides {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

#flex-container {
  @mixin displayAsBox;
  @mixin boxPack(center);
  @mixin boxAlign(center);
}

body {
  overflow: hidden;
  -webkit-perspective: 1000px;
  -moz-perspective: 1000px;
  background: #778;
}

.slides {
  position: relative;
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  z-index: 8;
  width: 900px;
  height: 700px;
}

.presentation {
  position: absolute;
  height: 100%;
  width: 100%;
  left: 0;
  top: 0;
  display: block;
  overflow: hidden;
  background: #778;
}

.slides-old {
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  position: absolute;
  display: none;
  @mixin transfromTransition(1s, ease-in-out);
}

.slide {
  width: 900px;
  height: 700px;
  background: #fff;
  -webkit-transition: -webkit-transform 0.8s ease-in-out, opacity 1.2s ease-in-out;
  -moz-transition: -moz-transform 0.8s ease-in-out, opacity 1.2s ease-in-out;
  @mixin boxOrient(vertical);
  @mixin boxSizing(content-box);
  overflow: hidden;
  display: none;
  position: absolute;
  border-radius: 10px;
  background-color: #eee;
  & p, textarea {
    font-size: 20px;
  }
  & .counter {
    color: #999999;
    position: absolute;
    left: 20px;
    bottom: 20px;
    display: block;
    font-size: 12px;
    width: 100%;
  }
  &:not(.transitionSlide) .counter:after {
    content: '';
    width: 32px;
    height: 32px;
    background-repeat: no-repeat;
    background-position: right bottom;
    position: absolute;
    bottom: 0;
    right: 45px;
    opacity: 0.25;
  }
  &.transitionSlide h2 {
    margin: 0;
    font-size: 40px;
    line-height: 10px;
  }
  &.transitionSlide p {
    margin: 0;
  }
  &.transitionSlide img {
    opacity: 0.25;
    width: 64px;
    height: 64px;
  }
}

#presentation-counter {
  color: #ccc;
  font-size: 100px;
  letter-spacing: 1px;
  position: absolute;
  top: 40%;
  left: 0;
  width: 100%;
  text-align: center;
}

.offline-storage .counter:after {
  background-image: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Offline_Storage_32.png);
}

.device-access .counter:after{
  background-image: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Device_Access_32.png);
}

.realtime-communication .counter:after {
  background-image: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Connectivity_32.png);
}

.performance .counter:after {
  background-image: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Performance_32.png);
}

.semantics .counter:after {
  background-image: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Semantics_32.png);
}

.multimedia .counter:after {
  background: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_MultiMedia_32.png);
}

.effects .counter:after {
  background: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_3D_Effects_32.png);
}

.styling .counter:after {
  background: url(http://www.html5rocks.com/static/images/identity/classes_32/HTML5_Styling_32.png);
}

.slide.far-past {
  z-index: 8;
  display: block;
  opacity: 0;
  @mixin transformTriple(translateZ, -600px, rotateY, -180deg, translateZ, 600px);
}

.slide.past {
  z-index: 8;
  visibility: visible;
  display: block;
  opacity: 0;
  @mixin transformTriple(translateZ, -600px, rotateY, -90deg, translateZ, 600px);
}

.slide.current {
  z-index: 9;
  visibility: visible;
  display: block;
  opacity: 1;
  @mixin transformTriple(translateZ, -600px, rotateY, 0deg, translateZ, 600px);
}

.slide.future {
  z-index: 8;
  visibility: visible;
  display: block;  
  opacity: 0;
  @mixin transformTriple(translateZ, -600px, rotateY, 90deg, translateZ, 600px);
}

.slide.far-future {
  z-index: 8;
  display: block;
  opacity: 0;
  @mixin transformTriple(translateZ, -600px, rotateY, 180deg, translateZ, 600px);
}

body.three-d {
  & .slides {
    @mixin transformTriple(translateX, 50px, scale, 0.8, rotateY, 10deg);
  }
  & .presentation {
    -webkit-tranform-style: preserve-3d;
    -webkit-perspective: 1000px;
    -moz-perspective: 1000px;
  }
}