<section class="section intro">
  <div class="container">
    <h1>Horizontal Timeline &rarr;</h1>
  </div>
</section>

<section class="timeline">
  <ol>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li>
      <div>
      </div>
    </li>
    <li></li>
  </ol>

  <div class="arrows">
    <button class="arrow arrow__prev disabled" disabled>
      <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/arrow_prev.svg" alt="prev timeline arrow">
    </button>
    <button class="arrow arrow__next">
      <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/162656/arrow_next.svg" alt="next timeline arrow">
    </button>
  </div>
</section>

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

button {
  background: transparent;
  border: none;
  cursor: pointer;
  outline: none;
}

body {
  font: normal 16px/1.5 "Helvetica Neue", sans-serif;
  background: #456990;
  color: #fff;
}


/* .section SECTION
–––––––––––––––––––––––––––––––––––––––––––––––––– */

.section {
  background: #F45B69;
  padding: 50px 0;
}

.section .container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.section h1 {
  font-size: 2.5rem;
}

.section h2 {
  font-size: 1.3rem;
}


/* TIMELINE
–––––––––––––––––––––––––––––––––––––––––––––––––– */

.timeline {
  white-space: nowrap;
  overflow-x: hidden;
}

.timeline ol {
  font-size: 0;
  width: 100vw;
  padding: 250px 0;
  transition: all 1s;
}

.timeline ol li {
  position: relative;
  display: inline-block;
  list-style-type: none;
  width: 160px;
  height: 3px;
  background: #fff;
}

.timeline ol li:last-child {
  width: 280px;
}

.timeline ol li:not(:first-child) {
  margin-left: 14px;
}

.timeline ol li:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  left: calc(100% + 1px);
  bottom: 0;
  width: 12px;
  height: 12px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: #F45B69;
}