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              <div class="accordion">

  <!-- Panel 1 -->
  <div>
    <input type="checkbox" name="panel" id="panel-1">
    <label for="panel-1">Panel 1</label>
    <div class="accordion__content">
      <h2 class="accordion__header">Header</h2>
      <p class="accordion__body">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iusto possimus at a cum saepe molestias modi illo facere ducimus voluptatibus praesentium deleniti fugiat ab error quia sit perspiciatis velit necessitatibus.Lorem ipsum dolor sit amet, consectetur adipisicing elit. Lorem ipsum dolor sit amet.</p>
    </div>
  </div>

  <!-- Panel 2 -->
  <div>
    <input type="checkbox" name="panel" id="panel-2">
    <label for="panel-2">Panel 2</label>
    <div class="accordion__content">
      <h2 class="accordion__header">Header</h2>
      <p class="accordion__body">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iusto possimus at a cum saepe molestias modi illo facere ducimus voluptatibus praesentium deleniti fugiat ab error quia sit perspiciatis velit necessitatibus.Lorem ipsum dolor sit amet, consectetur adipisicing elit. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quibusdam dolore officiis totam beatae iusto doloribus ratione sed adipisci ducimus quia dolorem numquam. Iste animi voluptatum odio nemo officiis sunt necessitatibus.</p>
    </div>
  </div>

  <!-- Panel 3 -->
  <div>
    <input type="checkbox" name="panel" id="panel-3">
    <label for="panel-3">Panel 3</label>
    <div class="accordion__content">
      <h2 class="accordion__header">Header</h2>
      <p class="accordion__body">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iusto possimus at a cum saepe molestias modi illo facere ducimus voluptatibus praesentium deleniti fugiat ab error quia sit perspiciatis velit necessitatibus.Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>
    </div>
  </div>

  <!-- Panel 4 -->
  <div>
    <input type="checkbox" name="panel" id="panel-4">
    <label for="panel-4">Panel 4</label>
    <div class="accordion__content">
      <h2 class="accordion__header">Header</h2>
      <p class="accordion__body">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iusto possimus at a cum saepe molestias modi illo facere ducimus voluptatibus praesentium deleniti fugiat ab error quia sit perspiciatis velit necessitatibus.Lorem ipsum dolor sit amet, consectetur adipisicing elit. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Necessitatibus ex tempora ad velit molestias vero atque nam eaque quam iste amet adipisci rem saepe tenetur a voluptatem officia. Soluta at!</p>
    </div>
  </div>

</div><!-- .accordion -->
            
          
!
            
              /* 
* Typography
*/
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,700);


/*
* Color Variables
*/

$light-grey: #eee;
$med-grey: #666;
$dark-grey: #444;
$highlight-color: #2980b9;


/*
* Animation Variables
*/

$timing: .4s;
$ease: cubic-bezier(0.865, 0.140, 0.095, 0.870);


/* 
* Global
*/

*,
*:before,
*:after {
  box-sizing: border-box;
}

/* 
* Base
*/

body {
  font-family: 'Open Sans', sans-serif;
  background: $light-grey;
  
  &:before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 0%,rgba(0,0,0,0.3) 100%);
  }
  
}


/*
* Accordion
*/

/* Basic Accordion Styles */
.accordion {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 75%;
  box-shadow: 0 1px 8px rgba(#000,.25);
  
  
  /* Radio Inputs */
  input[name='panel'] {
    display: none;
  }

  /* Labels */
  label {
    position: relative;
    display: block;
    padding: 1em;
    background: linear-gradient(to bottom, rgba(254,254,254,1) 0%,rgba(209,209,209,1) 50%,rgba(219,219,219,1) 55%,rgba(226,226,226,1) 100%);
    border-top: 1px solid #fff;
    border-bottom: 1px solid rgba(#000,.15);
    box-shadow: inset 0 2px 0 #fff;
    font-size: 1.5em;
    text-shadow: 0 1px 0 rgba(#fff,.75);
    color: $med-grey;
    cursor: pointer;
    transition: all $timing $ease;
    
    &:after {
      content: '+';
      position: absolute;
      right: 1em;
      width: 1em;
      height: 1em;
      color: $light-grey;
      text-align: center;
      border-radius: 50%;
      background: $highlight-color;
      box-shadow: inset 0 1px 6px rgba(#000,.5), 0 1px 0 #fff;
      text-shadow: 0 1px 0 rgba(#000,.75);     
    }
    
    &:hover {
      color: $highlight-color;
    }
      
  }
  
  input:checked + label {
    color: $highlight-color;
    
    &:after {
      content: '-';
      /* adjsut line-height to vertically center icon */
      line-height: .8em;
    }
    
  }
  
  /* Panel Content */
  .accordion__content {
    overflow: hidden;
    max-height: 0em;
    position: relative;
    padding: 0 1.5em;
    box-shadow: inset 4px 0 0 0 $highlight-color, inset 0 3px 6px rgba(#000,.75);
    background: $dark-grey;
    background: linear-gradient(to bottom, rgba(68,68,68,1) 0%,rgba(34,34,34,1) 100%);
    color: $light-grey;
    transition: all $timing $ease;
    
    &:not(:last-of-type) {
      box-shadow: inset 0 -2px 2px rgba(#000,.25), inset 4px 0 0 0 $highlight-color, inset 0 3px 6px rgba(#000,.75);
    }
    
    .accordion__header {
      padding: 1em 0;
    }
      
    .accordion__body {
      font-size: .825em;
      line-height: 1.4em;
      padding: 0 0 1.5em;
    }
    
  }
   
}

input[name='panel']:checked ~ .accordion__content {
  /* Get this as close to what height you expect */
  max-height: 50em;
}
            
          
!
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