.cntl {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.cntl-center {
  left: 0;
  right: 0;
  margin-left: auto;
  margin-right: auto;
}

.cntl-bar {
  position: absolute;
  width: 1px;
  top: 0;
  bottom: 0;
  background-color: #3c0d51;
  box-shadow: inset 0px 0px 7px -2px #3c0d51;
}

.cntl-bar-fill {
  background-color: #3c0d51;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 0;
}

.cntl-state {
  position: relative;
  width: 100%;
  min-height: 200px;
  margin-bottom: 50px;
}

.cntl-state::after {
  display: block;
  content: ' ';
  clear: both;
}

.cntl-icon {
  border-radius: 50%;
  width: 30px;
  height: 30px;
  background-color: #fff;
  border: solid 3px #3c0d51;
  box-shadow: 0px 0px 19px -9px black;
  position: absolute;
  top: 0;
  text-align: center;
  line-height: 30px;
}

.cntl-content {
  width: 40%;
  float: left;
  opacity: 0;
  position: relative;
  margin-left: -40%;
  text-align: left;
}
.cntl-content h3 {
  color: #3c0d51;
  margin-bottom: 15px !important;
}
.cntl-content .desc {
  font-size: 18px !important;
  line-height: 30px;
}

.cntl-state:nth-child(2n+2) .cntl-content {
  float: right;
  margin-right: -40%;
}

.cntl-image {
  opacity: 0;
  width: 40%;
  padding: 1%;
}
.cntl-image > img {
  display: inline-block;
}

.cntl-state:nth-child(2n+1) .cntl-image {
  float: right;
}

/*
animations
*/
.cntl-bar-fill, .cntl-content, .cntl-image {
  -webkit-transition: all 500ms ease;
  -moz-transition: all 500ms ease;
  -o-transition: all 500ms ease;
  -ms-transition: all 500ms ease;
  transition: all 500ms ease;
}

.cntl-state:nth-child(2n+2).cntl-animate .cntl-content {
  margin-right: 0%;
}

.cntl-animate .cntl-content {
  opacity: 1;
  margin-left: 0%;
}

.cntl-animate .cntl-image {
  opacity: 1;
}

/* mobile support */
@media (max-width: 600px) {
  .cntl-bar {
    left: auto;
    right: 37px;
    display: none;
  }

  .cntl-content {
    width: 100%;
    float: none;
  }

  .cntl-state:nth-child(2n+2) .cntl-content {
    margi-right: 0%;
    float: none;
  }

  .cntl-image {
    width: 100%;
  }

  .cntl-state:nth-child(2n+1) .cntl-image {
    float: none;
  }

  .animate .cntl-content {
    margin-left: 2%;
  }

  .cntl-icon {
    left: auto;
    right: 0;
    display: none;
  }
}