<div class="slider-container">
  <div class="slider-control left inactive"></div>
  <div class="slider-control right"></div>
  <ul class="slider-pagi"></ul>
  <div class="slider">
    <div class="slide slide-0 active">
      <div class="slide__bg"></div>
      <div class="slide__content">
        <svg class="slide__overlay" viewBox="0 0 720 405" preserveAspectRatio="xMaxYMax slice">
          <path class="slide__overlay-path" d="M0,0 150,0 500,405 0,405" />
        </svg>
        <div class="slide__text">
          <h2 class="slide__text-heading">Project name 1</h2>
          <p class="slide__text-desc">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia.</p>
          <a class="slide__text-link">Project link</a>
        </div>
      </div>
    </div>
    <div class="slide slide-1 ">
      <div class="slide__bg"></div>
      <div class="slide__content">
        <svg class="slide__overlay" viewBox="0 0 720 405" preserveAspectRatio="xMaxYMax slice">
          <path class="slide__overlay-path" d="M0,0 150,0 500,405 0,405" />
        </svg>
        <div class="slide__text">
          <h2 class="slide__text-heading">Project name 2</h2>
          <p class="slide__text-desc">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia.</p>
          <a class="slide__text-link">Project link</a>
        </div>
      </div>
    </div>
    <div class="slide slide-2">
      <div class="slide__bg"></div>
      <div class="slide__content">
        <svg class="slide__overlay" viewBox="0 0 720 405" preserveAspectRatio="xMaxYMax slice">
          <path class="slide__overlay-path" d="M0,0 150,0 500,405 0,405" />
        </svg>
        <div class="slide__text">
          <h2 class="slide__text-heading">Project name 3</h2>
          <p class="slide__text-desc">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia.</p>
          <a class="slide__text-link">Project link</a>
        </div>
      </div>
    </div>
    <div class="slide slide-3">
      <div class="slide__bg"></div>
      <div class="slide__content">
        <svg class="slide__overlay" viewBox="0 0 720 405" preserveAspectRatio="xMaxYMax slice">
          <path class="slide__overlay-path" d="M0,0 150,0 500,405 0,405" />
        </svg>
        <div class="slide__text">
          <h2 class="slide__text-heading">Project name 4</h2>
          <p class="slide__text-desc">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio veniam minus illo debitis nihil animi facere, doloremque voluptate tempore quia.</p>
          <a class="slide__text-link">Project link</a>
        </div>
      </div>
    </div>
  </div>
</div>

@import "compass/css3";

@font-face {
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/polar.otf');
  font-family: 'Polar';
}
$polar: 'Polar', Helvetica, Arial, sans-serif;
$openSans: 'Open Sans', Helvetica, Arial, sans-serif;
@mixin mediaMaxWidth($w) {
  @media (max-width: $w) {
    @content;
  }
}
*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html, body {
  font-size: 62.5%;
  height: 100%;
  overflow: hidden;
}
body {
  background: #000;
}
svg {
  display: block;
  overflow: visible;
}
.slider-container {
  position: relative;
  height: 100%;
  user-select: none;
  cursor: all-scroll;
}
.slider-control {
  z-index: 2;
  position: absolute;
  top: 0;
  width: 12%;
  height: 100%;
  transition: opacity 0.3s;
  will-change: opacity;
  opacity: 0;

  &.inactive:hover {
    cursor: auto;
  }

  &:not(.inactive):hover {
    opacity: 1;
    cursor: pointer;
  }

  &.left {
    left: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.18) 0%, rgba(0,0,0,0) 100%);
  }
  &.right {
    right: 0;
    background: linear-gradient(to right, rgba(0,0,0,0) 0%, rgba(0,0,0,0.18) 100%);
  }
}

.slider-pagi {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  font-size: 0;
  list-style-type: none;
  
  &__elem {
    position: relative;
    display: inline-block;
    vertical-align: top;
    width: 2rem;
    height: 2rem;
    margin: 0 0.5rem;
    border-radius: 50%;
    border: 2px solid #fff;
    cursor: pointer;
    
    &:before {
      content: "";
      position: absolute;
      left: 50%;
      top: 50%;
      width: 1.2rem;
      height: 1.2rem;
      background: #fff;
      border-radius: 50%;
      transition: transform 0.3s;
      transform: translate(-50%, -50%) scale(0);
    }
    
    &.active:before,
    &:hover:before {
      transform: translate(-50%, -50%) scale(1);
    }
  }
}
.slider {
  z-index: 1;
  position: relative;
  height: 100%;

  &.animating {
    transition: transform 0.5s;
    will-change: transform;

    .slide__bg {
      transition: transform 0.5s;
      will-change: transform;
    }
  }
}
.slide {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;

  &.active {

    .slide__overlay,
    .slide__text{
      opacity: 1;
      transform: translateX(0);
    }
  }

  &__bg {
    position: absolute;
    top: 0;
    left: -50%;
    width: 100%;
    height: 100%;
    background-size: cover;
    will-change: transform;
  }
  &:nth-child(1) {
    left: 0;

    .slide__bg {
      left: 0;
      background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/3d-slider-3.jpg');
    }

    .slide__overlay-path {
      fill: rgb(233, 156, 126);
    }

    @include mediaMaxWidth(991px) {
      .slide__text {
        background-color: rgba(233, 156, 126, 0.8);
      } 
    }
  }
  &:nth-child(2) {
    left: 100%;

    .slide__bg {
      left: -50%;
      background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/3d-slider-2.jpg');
    }

    .slide__overlay-path {
      fill: rgb(225, 204, 174);
    }

    @include mediaMaxWidth(991px) {
      .slide__text {
        background-color: rgba(225, 204, 174, 0.8);
      } 
    }
  }
  &:nth-child(3) {
    left: 200%;

    .slide__bg {
      left: -100%;
      background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/3d-slider-1.jpg');
    }

    .slide__overlay-path {
      fill: rgb(173, 197, 205);
    }

    @include mediaMaxWidth(991px) {
      .slide__text {
        background-color: rgba(173, 197, 205, 0.8);
      } 
    }
  }
  &:nth-child(4) {
    left: 300%;

    .slide__bg {
      left: -150%;
      background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/3d-slider-4.jpg');
    }

    .slide__overlay-path {
      fill: rgb(203, 198, 195);
    }

    @include mediaMaxWidth(991px) {
      .slide__text {
        background-color: rgba(203, 198, 195, 0.8);
      } 
    }
  }

  &__content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  &__overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 100%;
    min-height: 810px;
    transition: transform 0.5s 0.5s, opacity 0.2s 0.5s;
    will-change: transform, opacity;
    transform: translate3d(-20%, 0, 0);
    opacity: 0;

    @include mediaMaxWidth(991px) {
      display: none;
    }

    path {
      opacity: 0.8;
    }
  }

  &__text {
    position: absolute;
    width: 25%;
    bottom: 15%;
    left: 12%;
    color: #fff;
    transition: transform 0.5s 0.8s, opacity 0.5s 0.8s;
    will-change: transform, opacity;
    transform: translateY(-50%);
    opacity: 0;

    @include mediaMaxWidth(991px) {
      left: 0;
      bottom: 0;
      width: 100%;
      height: 20rem;
      text-align: center;
      transform: translateY(50%);
      transition: transform 0.5s 0.5s, opacity 0.5s 0.5s;
      padding: 0 1rem;
    }

    &-heading {
      font-family: $polar;
      font-size: 5rem;
      margin-bottom: 2rem;
      
      @include mediaMaxWidth(991px) {
        line-height: 20rem;
        font-size: 3.5rem;
      }
    }

    &-desc {
      font-family: $openSans;
      font-size: 1.8rem;
      margin-bottom: 1.5rem;

      @include mediaMaxWidth(991px) {
        display: none;
      }
    }

    &-link {
      z-index: 5;
      display: inline-block;
      position: relative;
      padding: 0.5rem;
      cursor: pointer;
      font-family: $openSans;
      font-size: 2.3rem;
      perspective: 1000px;
      
      @include mediaMaxWidth(991px) {
        display: none;
      }

      &:before {
        z-index: -1;
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: #000;
        transform-origin: 50% 100%;
        transform: rotateX(-85deg);
        transition: transform 0.3s;
        will-change: transform;
      }

      &:hover:before {
        transform: rotateX(0);
      }
    }
  }
}

$(document).ready(function() {
  
  var $slider = $(".slider"),
      $slideBGs = $(".slide__bg"),
      diff = 0,
      curSlide = 0,
      numOfSlides = $(".slide").length-1,
      animating = false,
      animTime = 500,
      autoSlideTimeout,
      autoSlideDelay = 6000,
      $pagination = $(".slider-pagi");
  
  function createBullets() {
    for (var i = 0; i < numOfSlides+1; i++) {
      var $li = $("<li class='slider-pagi__elem'></li>");
      $li.addClass("slider-pagi__elem-"+i).data("page", i);
      if (!i) $li.addClass("active");
      $pagination.append($li);
    }
  };
  
  createBullets();
  
  function manageControls() {
    $(".slider-control").removeClass("inactive");
    if (!curSlide) $(".slider-control.left").addClass("inactive");
    if (curSlide === numOfSlides) $(".slider-control.right").addClass("inactive");
  };
  
  function autoSlide() {
    autoSlideTimeout = setTimeout(function() {
      curSlide++;
      if (curSlide > numOfSlides) curSlide = 0;
      changeSlides();
    }, autoSlideDelay);
  };
  
  autoSlide();
  
  function changeSlides(instant) {
    if (!instant) {
      animating = true;
      manageControls();
      $slider.addClass("animating");
      $slider.css("top");
      $(".slide").removeClass("active");
      $(".slide-"+curSlide).addClass("active");
      setTimeout(function() {
        $slider.removeClass("animating");
        animating = false;
      }, animTime);
    }
    window.clearTimeout(autoSlideTimeout);
    $(".slider-pagi__elem").removeClass("active");
    $(".slider-pagi__elem-"+curSlide).addClass("active");
    $slider.css("transform", "translate3d("+ -curSlide*100 +"%,0,0)");
    $slideBGs.css("transform", "translate3d("+ curSlide*50 +"%,0,0)");
    diff = 0;
    autoSlide();
  }

  function navigateLeft() {
    if (animating) return;
    if (curSlide > 0) curSlide--;
    changeSlides();
  }

  function navigateRight() {
    if (animating) return;
    if (curSlide < numOfSlides) curSlide++;
    changeSlides();
  }

  $(document).on("mousedown touchstart", ".slider", function(e) {
    if (animating) return;
    window.clearTimeout(autoSlideTimeout);
    var startX = e.pageX || e.originalEvent.touches[0].pageX,
        winW = $(window).width();
    diff = 0;
    
    $(document).on("mousemove touchmove", function(e) {
      var x = e.pageX || e.originalEvent.touches[0].pageX;
      diff = (startX - x) / winW * 70;
      if ((!curSlide && diff < 0) || (curSlide === numOfSlides && diff > 0)) diff /= 2;
      $slider.css("transform", "translate3d("+ (-curSlide*100 - diff) +"%,0,0)");
      $slideBGs.css("transform", "translate3d("+ (curSlide*50 + diff/2) +"%,0,0)");
    });
  });
  
  $(document).on("mouseup touchend", function(e) {
    $(document).off("mousemove touchmove");
    if (animating) return;
    if (!diff) {
      changeSlides(true);
      return;
    }
    if (diff > -8 && diff < 8) {
      changeSlides();
      return;
    }
    if (diff <= -8) {
      navigateLeft();
    }
    if (diff >= 8) {
      navigateRight();
    }
  });
  
  $(document).on("click", ".slider-control", function() {
    if ($(this).hasClass("left")) {
      navigateLeft();
    } else {
      navigateRight();
    }
  });
  
  $(document).on("click", ".slider-pagi__elem", function() {
    curSlide = $(this).data("page");
    changeSlides();
  });
  
});