.accordion {}

  .accordion .accordion-head {
    cursor: pointer;
    padding: 0.2em 0;
    -webkiz-transition: .5s;
    transition: .5s;

    }
  .accordion .accordion-head-open {
    color: #090;
    cursor: default;
    }
  
  .accordion .accordion-content {
    overflow: hidden;
    max-height: 0;
    margin-bottom: 0;
    -webkiz-transition: .4s;
    transition: .4s;
    }  
  .accordion .accordion-head-open + .accordion-content {
    max-height: 100cm;
    margin-bottom: 2em;
    }