.toggle 
{
  display: none;
}

.line
{
    border-bottom-width: 1px;
    border-bottom-style: solid;
}

.toggle + label 
{
  display: block;
  margin:30px;
  font-weight: bold;   
}

.toggle + label + div
{
  display: none;
}

.toggle:checked + label + div
{
  display: block;
  position:relative;
  margin:25px 15px;
}

.toggle + label:before 
{
  content: "+";
  padding: 8px 14px;
  margin:30px;
  
  border-radius: 3px;
  line-height:50px;
  background: black;
  color: #FFF;
  font-size:24px;
  text-align:center;
  -webkit-font-smoothing: antialiased;
  cursor: pointer;
  transition:all 500ms ease;
}

.toggle:checked + label:before 
{
  content: "\2212";
}