<div class="timeline-container">
  <div class="timeline-block timeline-block-right">
    <div class="marker"></div>
    <div class="timeline-content">
      <h3>2020</h3>
      <strong>10 Oct</strong>
      <p>Long text...</p>
    </div>
  </div>
  <div class="timeline-block timeline-block-left">
    <div class="marker"></div>
    <div class="timeline-content">
      <h3>2021</h3>
      <strong>5 Sep</strong>
      <p>Text.</p>
    </div>
  </div>
  <div class="timeline-block timeline-block-right">
    <div class="marker"></div>
    <div class="timeline-content">
      <h3>2022</h3>
      <strong>1 Jan</strong>
      <p>Another text.</p>
    </div>
  </div>
</div>

.timeline-container {
  width: 90%;
  padding: 50px 0;
  margin: 25px auto;
  position: relative;
  overflow: hidden;

  &::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    margin-left: -1px;
    width: 2px;
    height: 100%;
    background: #f6f6f6;
    background: linear-gradient(
      to bottom,
      transparent 0%,
      #f6f6f6 5%,
      #f6f6f6 95%,
      transparent 100%
    );
    z-index: 1;
  }
}

.timeline-block {
  width: calc(50% + 8px);
  display: flex;
  justify-content: space-between;
  clear: both;

  &-right {
    float: right;
    text-align: left;
  }

  &-left {
    float: left;
    text-align: right;
    direction: rtl;
  }
}

.marker {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid #abc9db;
  background: #abc9db;
  margin-top: 10px;
  z-index: 2;
}

.timeline-content {
  width: 95%;
  padding: 0 15px;

  h3 {
    margin-top: 5px;
    font-weight: 500;
    margin-bottom: 5px;
  }

  p {
    word-spacing: 1px;
    direction: ltr;
    hyphens: auto;
    hyphenate-limit-chars: 6 3 2;
    hyphenate-limit-lines: 2;
    hyphenate-limit-last: always;
    hyphenate-limit-zone: 8%;
  }
}

@media screen and (max-width: 768px) {
  .timeline-container::before {
    left: 8px;
    width: 2px;
  }
  .timeline-block {
    width: 100%;
    margin-bottom: 30px;
    text-align: left;
  }
  .timeline-block-right {
    float: none;
  }
  .timeline-block-left {
    float: none;
    direction: ltr;
  }
}