CSS3 timeline animation

<h2>CSS3 Timeline</h2>
<p>Please set the $vertical variable to false to see the horizontal version.</p>
<ul id='timeline'>
  <li class='work'>
    <input class='radio' id='work5' name='works' type='radio' checked>
    <div class="relative">
      <label for='work5'>Lorem ipsum dolor sit amet</label>
      <span class='date'>12 May 2013</span>
      <span class='circle'></span>
    </div>
    <div class='content'>
      <p>
        I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience.
      </p>
    </div>
  </li>
  <li class='work'>
    <input class='radio' id='work4' name='works' type='radio'>
    <div class="relative">
      <label for='work4'>Lorem ipsum dolor sit amet</label>
      <span class='date'>11 May 2013</span>
      <span class='circle'></span>
    </div>
    <div class='content'>
      <p>
        I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience.
      </p>
    </div>
  </li>
  <li class='work'>
    <input class='radio' id='work3' name='works' type='radio'>
    <div class="relative">
      <label for='work3'>Lorem ipsum dolor sit amet</label>
      <span class='date'>10 May 2013</span>
      <span class='circle'></span>
    </div>
    <div class='content'>
      <p>
        I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience.
      </p>
    </div>
  </li>
  <li class='work'>
    <input class='radio' id='work2' name='works' type='radio'>
    <div class="relative">
      <label for='work2'>Lorem ipsum dolor sit amet</label>
      <span class='date'>09 May 2013</span>
      <span class='circle'></span>
    </div>
    <div class='content'>
      <p>
        I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience.
      </p>
    </div>
  </li>
  <li class='work'>
    <input class='radio' id='work1' name='works' type='radio'>
    <div class="relative">
      <label for='work1'>Lorem ipsum dolor sit amet</label>
      <span class='date'>08 May 2013</span>
      <span class='circle'></span>
    </div>
    <div class='content'>
      <p>
        I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience. I am a man who has no patience, but I am a man who has no patience.
      </p>
    </div>
  </li>
</ul>

/* -------------------------------------
 * For horizontal version, set the
 * $vertical variable to false
 * ------------------------------------- */
/* -------------------------------------
 * General Style
 * ------------------------------------- */
@import url(https://fonts.googleapis.com/css?family=Noto+Sans);
body {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
  font-size: 100%;
  font-family: "Noto Sans", sans-serif;
  color: #eee9dc;
  background: #48b379;
}

h2 {
  margin: 3em 0 0 0;
  font-size: 1.5em;
  letter-spacing: 2px;
  text-transform:uppercase;
}

/* -------------------------------------
 * timeline
 * ------------------------------------- */
#timeline {
  list-style: none;
  margin: 50px 0 30px 120px;
  padding-left: 30px;
  border-left: 8px solid #eee9dc;
}
#timeline li {
  margin: 40px 0;
  position: relative;
}
#timeline p {
  margin: 0 0 15px;
}

.date {
  margin-top: -10px;
  top: 50%;
  left: -158px;
  font-size: 0.95em;
  line-height: 20px;
  position: absolute;
}

.circle {
  margin-top: -10px;
  top: 50%;
  left: -44px;
  width: 10px;
  height: 10px;
  background: #48b379;
  border: 5px solid #eee9dc;
  border-radius: 50%;
  display: block;
  position: absolute;
}

.content {
  max-height: 20px;
  padding: 50px 20px 0;
  border-color: transparent;
  border-width: 2px;
  border-style: solid;
  border-radius: 0.5em;
  position: relative;
}
.content:before, .content:after {
  content: "";
  width: 0;
  height: 0;
  border: solid transparent;
  position: absolute;
  pointer-events: none;
  right: 100%;
}
.content:before {
  border-right-color: inherit;
  border-width: 20px;
  top: 50%;
  margin-top: -20px;
}
.content:after {
  border-right-color: #48b379;
  border-width: 17px;
  top: 50%;
  margin-top: -17px;
}
.content p {
  max-height: 0;
  color: transparent;
  text-align: justify;
  word-break: break-word;
  hyphens: auto;
  overflow: hidden;
}

label {
  font-size: 1.3em;
  position: absolute;
  z-index: 100;
  cursor: pointer;
  top: 20px;
  transition: transform 0.2s linear;
}

.radio {
  display: none;
}

.radio:checked + .relative label {
  cursor: auto;
  transform: translateX(42px);
}
.radio:checked + .relative .circle {
  background: #f98262;
}
.radio:checked ~ .content {
  max-height: 180px;
  border-color: #eee9dc;
  margin-right: 20px;
  transform: translateX(20px);
  transition: max-height 0.4s linear, border-color 0.5s linear, transform 0.2s linear;
}
.radio:checked ~ .content p {
  max-height: 200px;
  color: #eee9dc;
  transition: color 0.3s linear 0.3s;
}

/* -------------------------------------
 * mobile phones (vertical version only)
 * ------------------------------------- */
@media screen and (max-width: 767px) {
  #timeline {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
  }
  #timeline li {
    margin: 50px 0;
  }

  label {
    width: 85%;
    font-size: 1.1em;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    display: block;
    transform: translateX(18px);
  }

  .content {
    padding-top: 45px;
    border-color: #eee9dc;
  }
  .content:before, .content:after {
    border: solid transparent;
    bottom: 100%;
  }
  .content:before {
    border-bottom-color: inherit;
    border-width: 17px;
    top: -16px;
    left: 50px;
    margin-left: -17px;
  }
  .content:after {
    border-bottom-color: #48b379;
    border-width: 20px;
    top: -20px;
    left: 50px;
    margin-left: -20px;
  }
  .content p {
    font-size: 0.9em;
    line-height: 1.4;
  }

  .circle, .date {
    display: none;
  }
}