/*
  Source :https://www.w3schools.com/howto/howto_css_timeline.asp
  */
  
  /* The actual timeline (the vertical ruler) */
  .timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  /* The actual timeline (the vertical ruler) */
  .timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: #333333;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
  }
  
  /* timelineBox around content */
  .tl-container {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
  }
  
  /* The circles on the timeline */
  .tl-container::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    right: -5px;
    background-color: #efefef;
    border: 2px solid #333333;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
  }
  
  /* Place the timelineBox to the left */
  .tl-left {
    left: 0;
  }
  
  /* Place the timelineBox to the right */
  .tl-right {
    left: 50%;
  }
  
  /* Add arrows to the left timelineBox (pointing right) */
  .tl-left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 20px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
  }
  
  /* Add arrows to the right timelineBox (pointing left) */
  .tl-right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 20px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
  }
  
  /* Fix the circle for timelineBoxs on the right side */
  .tl-right::after {
    left: -10px;
  }
  
  /* The actual content */
  .tl-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
  }
  
  /* Media queries - Responsive timeline on screens less than 600px wide */
  @media screen and (max-width: 600px) {
  /* Place the timelime to the left */
    .timeline::after {
      left: 31px;
    }
  
  /* Full-width timelineBoxs */
    .tl-container {
      width: 100%;
      padding-left: 70px;
      padding-right: 25px;
    }
  
  /* Make sure that all arrows are pointing leftwards */
    .tl-container::before {
      left: 60px;
      border: medium solid white;
      border-width: 10px 10px 10px 0;
      border-color: transparent white transparent transparent;
    }
  
  /* Make sure all circles are at the same spot */
    .tl-left::after, .tl-right::after {
      left: 21px;
    }
  
  /* Make all right timelineBoxs behave like the left ones */
    .tl-right {
      left: 0%;
    }
  }