{% assign letterstring = "a,b,c,d,e,f,g,h,i,j,k,l,m,n" %}
{% assign letters = letterstring | split: ',' %}
{% assign number = include.number | minus: 1 %}
<div class="carousel__holder">
    <div id="carousel{{ number }}" class="carousel">
        {% for item in page.carousels[number].images %}
          <input class="carousel__activator" type="radio" name="carousel{{ number }}" id="{{ number }}{{ letters[forloop.index0] }}" {% if forloop.first %}checked="checked"{% endif %} />
        {% endfor %}
        {% for item in page.carousels[number].images %}
          {% if forloop.index == forloop.length %}
            {% assign nextindex = 0 %}
          {% else %}
            {% assign nextindex = forloop.index0 | plus: 1 %}
          {% endif %}
          {% assign nextletter = letters[nextindex] %}
          {% if forloop.index0 == 0 %}
            {% assign previndex = forloop.length | minus: 1 %}
          {% else %}
            {% assign previndex = forloop.index0 | minus: 1 %}
          {% endif %}
          {% assign prevletter = letters[previndex] %}
          <div class="carousel__controls">
              <label class="carousel__control carousel__control--backward" for="{{ number }}{{ prevletter }}"></label>
              <label class="carousel__control carousel__control--forward" for="{{ number }}{{ nextletter }}"></label>
          </div>
        {% endfor %}
        <div class="carousel__track">
          <ul>
            {% for item in page.carousels[number].images %}
            <li class="carousel__slide" style="background-image: url('{{ item.image }}');"></li>
            {% endfor %}
          </ul>
        </div>
        <div class="carousel__indicators">
            {% for item in page.carousels[number].images %}
              <label class="carousel__indicator" for="{{ number }}{{ letters[forloop.index0] }}"></label>
            {% endfor %}
        </div>
    </div>
</div>

<style>
.carousel__holder {width: 100%; position: relative; padding-bottom: {{ include.height }}{{ include.unit }}; margin: 1rem 0 1rem;}
.carousel {
  height: 100%;
  width: 100%;
  overflow: hidden;
  text-align: center;
  position: absolute;
  padding: 0;
}
.carousel__controls,
.carousel__activator {
  display: none;
}
{% for item in page.carousels[number].images %}
.carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__track {
  -webkit-transform: translateX(-{{ forloop.index0 }}00%);
          transform: translateX(-{{ forloop.index0 }}00%);
}
.carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__slide:nth-of-type({{ forloop.index }}) {
  transition: opacity 0.5s, -webkit-transform 0.5s;
  transition: opacity 0.5s, transform 0.5s;
  transition: opacity 0.5s, transform 0.5s, -webkit-transform 0.5s;
  top: 0;
  left: 0;
  right: 0;
  opacity: 1;
  -webkit-transform: scale(1);
          transform: scale(1);
}
.carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__controls:nth-of-type({{ forloop.index }}) {
  display: block;
  opacity: 1;
}
.carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
  opacity: 1;
}
{% endfor %}

.carousel__control {
  height: 30px;
  width: 30px;
  margin-top: -15px;
  top: 50%;
  position: absolute;
  display: block;
  cursor: pointer;
  border-width: 5px 5px 0 0;
  border-style: solid;
  border-color: #fafafa;
  opacity: 0.35;
  opacity: 1;
  outline: 0;
  z-index: 3;
}
.carousel__control:hover {
  opacity: 1;
}
.carousel__control--backward {
  left: 20px;
  -webkit-transform: rotate(-135deg);
          transform: rotate(-135deg);
}
.carousel__control--forward {
  right: 20px;
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
}
.carousel__indicators {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
}
.carousel__indicator {
  height: 15px;
  width: 15px;
  border-radius: 100%;
  display: inline-block;
  z-index: 2;
  cursor: pointer;
  opacity: 0.35;
  margin: 0 2.5px 0 2.5px;
}
.carousel__indicator:hover {
  opacity: 0.75;
}
.carousel__track {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 0;
  margin: 0;
  transition: -webkit-transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s;
  transition: transform 0.5s ease 0s, -webkit-transform 0.5s ease 0s;
}
.carousel__track .carousel__slide {
  display: block;
  top: 0;
  left: 0;
  right: 0;
  opacity: 1;
}
{% for item in page.carousels[number].images %}
.carousel__track .carousel__slide:nth-of-type({{ forloop.index }}) {
  -webkit-transform: translateX({{ forloop.index0 }}00%);
          transform: translateX({{ forloop.index0 }}00%);
}
{% endfor %}

.carousel--scale .carousel__slide {
  -webkit-transform: scale(0);
          transform: scale(0);
}
.carousel__slide {
  height: 100%;
  position: absolute;
  opacity: 0;
  overflow: hidden;
}
.carousel__slide .overlay {height: 100%;}
.carousel--thumb .carousel__indicator {
  height: 30px;
  width: 30px;
}
.carousel__indicator {
  background-color: #fafafa;
}
{% for item in page.carousels[number].images %}
.carousel__slide:nth-of-type({{ forloop.index }}),
.carousel--thumb .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
  background-size: cover;
  background-position: center;
}
{% endfor %}
</style>

<script>
  function isVisible(el) {
        while (el) {
            if (el === document) {
                return true;
            }

            var $style = window.getComputedStyle(el, null);

            if (!el) {
                return false;
            } else if (!$style) {
                return false;
            } else if ($style.display === 'none') {
                return false;
            } else if ($style.visibility === 'hidden') {
                return false;
            } else if (+$style.opacity === 0) {
                return false;
            } else if (($style.display === 'block' || $style.display === 'inline-block') &&
                $style.height === '0px' && $style.overflow === 'hidden') {
                return false;
            } else {
                return $style.position === 'fixed' || isVisible(el.parentNode);
            }
        }
  }
  {% if include.duration %}
  setInterval(function(){
    var j=0;
    var elements = document.querySelectorAll('#carousel{{ number}} .carousel__control--forward');
    for(i=(elements.length - 1);i>-1;i--) {
      if(isVisible(elements[i])) j=i;
    }
    elements[j].click();
  },{{ include.duration }}000);
  {% endif %}
</script>