<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" rel="stylesheet">  
<div class="slider">
    <div class="slider-control slide-left"><i class="fa fa-minus fa-2x"></i></div>
  <div class="slider-control slide-right"><i class="fa fa-plus fa-2x"></i></div>
    <div class="slide-box">
      <div class="slide" style="background-image: url(https://images.unsplash.com/photo-1427435150519-42d9bcd0aa81?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&s=1896a40b338ccfb0d8ff7e5199e5ecd2)">
        <div class="slide-content">
          <H1>A Full Page Slider</H1>
          <p>With a flex-box container inside it.</p>
        </div>
      </div>
      
      <div class="slide" style="background-image: url(https://images.unsplash.com/photo-1452800185063-6db5e12b8e2e?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&s=2700f9770386e4c5ebc53502a9099966)">
      </div>
      
      <div class="slide" style="background-image: url(https://images.unsplash.com/photo-1452274381522-521513015433?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&s=476b9724fcf47b51c652d66e384f9ba0)">
      </div>
    </div>
</div>

@import "bourbon";

@import url(https://fonts.googleapis.com/css?family=Lato:100,900);

html, body{
  height: 100%;
  font-family: 'Lato', sans-serif;
  font-weight: 100;
}

h1, h2, h3, h4{
  font-weight: 900;
}

.slider{
	overflow:hidden;
	position: relative;
  width: 100%;
  height: 100%;
  margin: 0 auto;

	.slider-control{
    @include transition(all .4s);
		width: 48px;
		height: 48px;
		position: absolute;
		top: 50%;
     margin-top: -24px;
		z-index: 1;
		border-radius: 50%;
		background: #FFF;
		opacity: .8;
		cursor: pointer;
     line-height: 48px;
     text-align: center;

      &:hover{
        @include transform(scale(1.1));
        background: #222;
        
      }
		
		&.slide-left{
			left: 24px;
		}

		&.slide-right{
			right: 24px;
		}
    
      i{
        color: #ccc;
        line-height: 48px;
      }
	}


	.slide-box{
		@include transition(all .8s ease-out);
		height: 100%;
		width: 999999px;
      
    img{
      width: 100%;
    }
		
    .slide{
      @include transition(all .8s ease-out);
      background-size: cover;
      background-position: center center;
      float: left;
		 width: 100%;
      height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      box-shadow: 0 0 20000px #000;
      z-index: 10;

      .slide-content{
        height: 40%;
        font-size: 22px;
        min-height: 200px;
        width: 40%;
        min-width: 300px;
        color: #FFF;
        background: hsla(225deg, 50%, 40%, .5);
        text-align: center;
      }
		}
	}
}

  var $slider = $('.slider');
  var $slideBox = $slider.find('.slide-box');
  var $leftControl = $slider.find('.slide-left');
  var $rightControl = $slider.find('.slide-right');
  var $slides = $slider.find('.slide');
  var numItems = $slider.find('.slide').length;
  var position = 0;


  var windowWidth = $(window).width();
  $slides.width(windowWidth);
  $leftControl.on('click', function(){
    var width = $slider.width();
    position = position - 1 >= 0 ? position - 1 : numItems - 1;
    if(position != numItems-1){
      $slider.find('.slide').eq(position + 1).css('margin-left', 0);
    }
    else{
      $slider.find('.slide:gt(0)').each(function(index){
        $(this).css('margin-left', width * -1 + 'px');
      });
    }
  });

  $rightControl.on('click', function(){
    var width = $slider.width();
    position = position + 1 < numItems ? position + 1 : 0;
    if(position != 0){
      $slider.find('.slide').eq(position).css('margin-left',  width * -1 + 'px');
    }
    else{
      $slider.find('.slide').css('margin-left', 0);
    }
  });

  $(window).resize(function(){
   $slides.width($(window).width()).height($(window).height);
  });