#howToUse .card  {
    color: #fff;
    border-radius: 50%;
    border-width: 8px;
    padding: 20px;
    height: 240px;
    width: 240px;
    margin: 20px auto;
}
#howToUse .col-md-4:nth-last-child(5n+0) .card{
    background-color: #a6cf47;
}
#howToUse .col-md-4:nth-last-child(5n+1) .card{
    background-color: #f0984c;
}
#howToUse .col-md-4:nth-last-child(5n+2) .card{
    background-color: #67c9ea;
}
#howToUse .col-md-4:nth-last-child(5n+3) .card{
    background-color: #b04e7f;
}
#howToUse .col-md-4:nth-last-child(5n+4) .card{
    background-color: #4d4949;
}
.panel, .panel-body {
  box-shadow: none;
  padding: 10px 15px
}

.panel-group .panel-heading {
  padding: 0
}

.panel-group .panel-heading {
  display: block;
  padding: 0 15px;
  text-decoration: none;
  position: relative
}

.panel-group .panel-heading:after {
  content: '﹘';
  float: right
}

.panel-group .panel-heading.collapsed:after {
  content: '+'
}