CSS - Panel Expander

No JS Needed

HTML

<div class="content">

  <div class="expander">
    <div class="expand-header">
      Filter/tag name here
    </div>
    <div class="orignal-content">
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent porta lectus nec massa euismod vehicula. Sed sodales accumsan erat, ut pharetra libero molestie vitae.
    </div>
    <input id="uniq1" class="expand-control" type="checkbox" />
    <label class="expand-label" for="uniq1"></label>
    <div class="expand-panel">
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent porta lectus nec massa euismod vehicula. Sed sodales accumsan erat, ut pharetra libero molestie vitae.
    </div>
  </div>
</div>

CSS

/* Structural CSS */
.expander .expand-panel {
  display: none;
  margin-top: 10px;
  padding: 4px;
}
.expander .expand-header {
  height: 23px;
}

.expander {
  border:1px solid gray;
  padding: 4px;
  padding-bottom: 25px;
}
.expander .expand-control,
.expander .expand-label {
  float: left;
}

.expander .expand-control:checked ~ .expand-panel {
  display: block;
}

.expander .expand-control:checked#uniq1 {
  display: none;
}

/* styling */

.content {
  width: 300px;
  margin: 0px auto;
}

.expander {
  margin-bottom: 20px;
  position: relative;
}

.expander .expand-label {
  cursor: pointer;
}

.expander .expand-control {
  display: none;
}

.expander input[type='checkbox'].expand-control + label:before {
  content: "+";
  font-size: 24px;
  line-height: 20px;
  display: block;
  width: 20px;
  height: 20px;
  background-color: #C0C0FF;
  border: 1px solid red;
  text-align: center;
  cursor: pointer;
  margin-left: 5px;
}

.expander input[type='checkbox'].expand-control:checked + label:before {
  content: "-";
  position: absolute;
  bottom: 0px;
  margin-left: 5px;
  margin-bottom
}