ul
  li
    #easing
      span
    h4 Easing
  li
    #parenting
      span
      span
    h4 Parenting
  li
    #obscuration
      span
    h4 Obscuration
  li
    #parallax
      span
    h4 Parallax
  li
    #dimension
    h4 Dimentionality
  li
    #transformation
    h4 Transformation
  li
    #dollyZoom
      ul
        -for(i=1;i<=9;i++)
          li
    h4 Dolly & Zoom
  li
    #masking
      span
    h4 Masking

@import url("https://fonts.googleapis.com/css?family=Open+Sans");

@mixin object($width, $height, $bg) {
  width: $width;
  height: $height;
  background: $bg;
}

@mixin transPos($top, $right, $bottom, $left,$transX,$transY) {
  position: absolute;
  top: $top;
  left: $left;
  right: $right;
  bottom: $bottom;
  transform: translate($transX, $transY);
}

@mixin center {
  display: flex;
  justify-content: center;
  align-items: center;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-image: linear-gradient(-45deg, #00c6fb 0%, #005bea 100%);
  background-repeat: no-repeat;
  height: 100vh;
}

ul {
  height: 100%;
}

li {
  border: 1px solid rgba(#fff, 0.1);
  display: flex;
  width: 25%;
  height: 50%;
  float: left;
  justify-content: center;
  align-items: center;
  position: relative;
}

h4 {
  @include transPos(null,null,8vh,50%,-50%,0);
  text-align: center;
  margin-top: 40px;
  color: #fff;
  font-family: "Open Sans", sans-serif;
}

@media screen and (max-width: 767px) {
  li {
    width: 50%;
  }
}

@media screen and (max-width: 567px) {
  li {
    width: 100%;
  }
}

span {
  border-radius: 4px;
  display: block;
}

/***
Easing
***/

#easing {
  overflow: hidden;
  width: 200px;
  span {
    @include object(80px,80px,#fff);
    animation: easing 2s ease-out infinite;
    @keyframes easing {
      0% {
        transform: translateX(-120px);
      }
      75% {
        transform: translateX(40px);
      }
      100% {
        transform: translateX(250px);
      }
    }
  }
}

/***
Parenting
***/

#parenting {
  span {
    @include object(100px,40px,#fff);
    margin: 10px 0;
    animation: slide 1s ease-in-out infinite alternate;
    @keyframes slide {
      0% {
        transform: translateX(-50px);
      }
      100% {
        transform: translateX(50px);
      }
    }
    &:first-child {
      transform-origin: 50% 100%;
      animation: growShrink 1s ease-in-out infinite alternate;
      @keyframes growShrink {
        0% {
          transform: translateX(-50px) scale(0.1);
        }
        100% {
          transform: translateX(50px) scale(1);
        }
      }
    }
  }
}

/***
Obscuration
***/
#obscuration {
  @include object(60px,80px,#fff);
  border-radius: 4px;
  position: relative;
  span {
    opacity: 0.7;
    @include object(90px,110px,#f7f7f7);
    @include transPos(50%,null,null,-60px,0,-50%);
    animation: obscure 1s cubic-bezier(0.6, 0, 0.4, 1) infinite alternate;
    @keyframes obscure {
      100% {
        left: 30px;
      }
    }
  }
}

/***
Dolly & Zoom
***/

#dollyZoom {
  @include object(65px,65px,transparent);
  overflow: hidden;
  border-radius: 4px;
  position: relative;
  ul {
    @include object(150px,150px,transparent);
    overflow:hidden;
    position:absolute;
    top:50%;
    left:50%;
    transform: scale(1) translate(-50%,-50%);
    transform-origin:118% 103%;
    animation: zoom 2s ease-in-out infinite alternate;
    @keyframes zoom {
      100% {
        transform-origin:center center;
        transform: scale(0.412) translate(-120%,-122%);
      }
    }
  }
  li {
    background: #fff;
    border-radius: 0;
    width:40px;
    height: 40px;
    margin-right: 15px;
    &:nth-child(3n){
      margin-right: 0;
    }
    &:nth-child(4),
    &:nth-child(5),
    &:nth-child(6),
    &:nth-child(7),
    &:nth-child(8),
    &:nth-child(9){
      margin-top: 15px;
    }
  }
}

/***
Transformation
***/

#transformation {
  @include object(60px,60px,#fff);
  border-radius: 50%;
  animation: transform 1s ease-in-out infinite alternate;
  @keyframes transform {
    100% {
      width: 150px;
      border-radius: 4px;
    }
  }
}

/***
Masking
***/

#masking {
  @include object(150px,60px,#EAEAEA);
  @include center;
  border-radius: 4px;
  overflow: hidden;
  span {
    @include object(30px,30px,#fff);
    border-radius: 50%;
    animation: fill 1s ease-in-out infinite alternate;
    @keyframes fill {
      100% {
        width: 250px;
        height: 250px;
        border-radius: 50%;
      }
    }
  }
}

/***
Parallax
***/

#parallax {
  @include object(160px,90px,#EAEAEA);
  @include center;
  border-radius: 4px;
  span {
    @include object(120px,90px,#fff);
    animation: parallax 1s ease-in-out infinite alternate;
    @keyframes parallax {
      0% {
        transform: translateY(-20px);
      }
      100% {
        transform: translateY(20px);
      }
    }
  }
}

/***
Dimentionality
***/
li:nth-child(5) {
  perspective: 400px;
}
#dimension {
  @include object(190px,60px,#fff);
  border-radius: 4px;
  animation: dimension 1s ease-in-out infinite alternate;
  @keyframes dimension {
    100% {
      transform: rotateX(-90deg);
    }
  }
}