* {
  box-sizing: border-box;
  font-family: Arial;
}

body {
  background: #2c3e50;
  color: white;
}

h1 {
  text-align: center;
}

.wrap {
  margin: 0;
  margin-top: 2em;
  padding: 0;
}

ul {
  margin: auto;
  padding: 0;
}
@media screen and (min-width: 800px) {
  ul {
    width: 800px;
  }
}
ul li.node {
  position: relative;
  list-style-type: none;
  width: 300px;
  height: auto;
  margin: auto;
  margin-bottom: .1em;
  text-align: center;
}
@media screen and (min-width: 800px) {
  ul li.node {
    width: 250px;
    height: 200px;
    float: left;
    clear: both;
  }
}
ul li.node .title {
  padding: 0;
  margin: 5px;
}
ul li.node .content {
  padding: 0;
  margin: 5px;
  font-weight: 100px;
  font-style: italic;
}
ul li.node .line {
  z-index: -1;
  width: 4px;
  height: 150px;
  margin: auto;
  background: #34495e;
}
@media screen and (min-width: 800px) {
  ul li.node .line {
    -moz-transform: rotate(-70deg);
    -ms-transform: rotate(-70deg);
    -webkit-transform: rotate(-70deg);
    transform: rotate(-70deg);
    top: -8em;
    right: -60%;
    height: 540px;
    position: absolute;
  }
}
@media screen and (min-width: 800px) {
  ul li.node:nth-child(2n) {
    float: right;
  }
  ul li.node:nth-child(2n) .line {
    -moz-transform: rotate(70deg);
    -ms-transform: rotate(70deg);
    -webkit-transform: rotate(70deg);
    transform: rotate(70deg);
    right: auto;
    left: -62%;
  }
}

.progress {
  opacity: 0;
  width: 100%;
  height: 0;
  background: #f1c40f;
  -moz-transition: all 2s ease-in-out;
  -o-transition: all 2s ease-in-out;
  -webkit-transition: all 2s ease-in-out;
  transition: all 2s ease-in-out;
}

.active {
  opacity: 1 !important;
  height: 100% !important;
}

.circle {
  z-index: 20;
  display: inline-block;
  width: 80px;
  height: 80px;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  border-radius: 50%;
  background: #f1c40f;
}

.clearfix:after {
  content: ".";
  display: block;
  clear: both;
  visibility: hidden;
  line-height: 0;
  height: 0;
  font-size: 0;
}