.cd-h-timeline {
    opacity: 0;
    transition: opacity 0.2s;
  }

  .cd-h-timeline--loaded { // show the timeline after dates position has been set (using JavaScript)
    opacity: 1;
  }

  .cd-h-timeline__container {
    position: relative;
    height: 6.25rem;
    max-width: 50rem;
  }

  .cd-h-timeline__dates {
    position: relative;
    height: 100%;
    margin: 0 2.5rem;
    overflow: hidden;

    &::after, &::before { // these are used to create a shadow effect at the sides of the timeline
      content: '';
      position: absolute;
      z-index: 2;
      top: 0;
      height: 100%;
      width: 1.25rem;
    }

    &::before {
      #{$dlab-pos-left}: 0;
      background: var(--primary);
    }

    &::after {
      #{$dlab-pos-right}: 0;
      background: var(--primary);
    }
  }

  .cd-h-timeline__line { // grey line
    position: absolute;
    z-index: 1;
    #{$dlab-pos-left}: 0;
    top: 3.0625rem;
    height: 0.125rem; // width will be set using JavaScript
    background-color: var(--primary);
    transition: transform 0.4s;
  }

  .cd-h-timeline__filling-line { // green filling line
    position: absolute;
    z-index: 1;
    #{$dlab-pos-left}: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background-color: $success;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.3s;
  }

  .cd-h-timeline__date {
    position: absolute;
    bottom: 0; // left position will be set using JavaScript
    z-index: 2;
    text-align: center;
    font-size: 0.8em;
    padding-bottom: var(--space-sm);
    color: var(--cd-color-1);
    user-select: none; // improve swipe
    text-decoration: none;

    &::after { // this is used to create the event spot
      content: '';
      position: absolute;
      #{$dlab-pos-left}: 50%;
      transform: translateX(-50%);
      bottom: -0.3125rem;
      height: 0.75rem;
      width: 0.75rem;
      border-radius: 50%;
      border-width: 0.125rem;
      border-style: solid;
      border-color: var(--rgba-primary-6);
      background-color: var(--primary);
      transition: background-color 0.3s, border-color .3s;
    }

    &:hover::after {
      background-color: $success;
      border-color: $success;
    }
  }



  .cd-h-timeline__date--selected {
    pointer-events: none;

    &::after {
      background-color: $success;
      border-color: $success;
    }
  }

  .cd-h-timeline__date--older-event::after {
    border-color: $success;
  }

  .cd-h-timeline__navigation { // arrows to navigate the timeline
    position: absolute;
    z-index: 1;
    top: 50%;
    transform: translateY(-50%);
    height: 2.125rem;
    width: 2.125rem;
    border-radius: 50%;
    border-width: 0.125rem;
    border-style: solid;
    border-color: var(--rgba-primary-6);
    transition: border-color 0.3s;
    
    &::after { // arrow icon
      content: '';
      position: absolute;
      height: 1rem;
      width: 1rem;
      top: 50%;
      #{$dlab-pos-left}: 50%;
      transform: translateX(-50%) translateY(-50%);
      background: url(../images/svg/cd-arrow.svg) no-repeat 0 0;
    }

    &:hover {
      border-color: $success;
    }
  }

  .cd-h-timeline__navigation--prev {
    #{$dlab-pos-left}: 0;
    transform: translateY(-50%) rotate(180deg);
  }

  .cd-h-timeline__navigation--next {
    #{$dlab-pos-right}: 0;
  }

  .cd-h-timeline__navigation--inactive {
    cursor: not-allowed;

    &::after {
      background-position: 0 -1rem;
    }

    &:hover {
      border-color: var(--rgba-primary-6);
    }
  }

  .cd-h-timeline__events { // container of events info
    position: relative;
    width: 100%;
    overflow: hidden;
    transition: height .4s;
  }

  .cd-h-timeline__event { // single event info
    position: absolute;
    z-index: 1;
    width: 100%;
    #{$dlab-pos-left}: 0;
    top: 0;
    transform: translateX(-100%);
    padding: 0.0625rem 5%;
    opacity: 0;
    animation-duration: 0.4s;
    animation-timing-function: ease-in-out;
  }

  .cd-h-timeline__event--selected { // selected event info
    position: relative;
    z-index: 2;
    opacity: 1;
    transform: translateX(0);
  }

  .cd-h-timeline__event--enter-right, 
  .cd-h-timeline__event--leave-right { // animate event info
    animation-name: cd-enter-right;
  }

  .cd-h-timeline__event--enter-left,  
  .cd-h-timeline__event--leave-left { // animate event info
    animation-name: cd-enter-left;
  }

  .cd-h-timeline__event--leave-right, 
  .cd-h-timeline__event--leave-left {
    animation-direction: reverse;
  }

  .cd-h-timeline__event-content {
    max-width: 50rem;
  }

  .cd-h-timeline__event-title {
    color: var(--cd-color-1);
    font-family: var(--font-secondary);
    font-weight: 700;
    font-size: var(--text-xxxl);
  }

  .cd-h-timeline__event-date {
    display: block;
    font-style: italic;
    margin: var(--space-xs) auto;

    &::before {
      content: '- ';
    }
  }

  @keyframes cd-enter-right {
    0% {
      opacity: 0;
      transform: translateX(100%);
    }
  
    100% {
      opacity: 1;
      transform: translateX(0%);
    }
  }
  
  @keyframes cd-enter-left {
    0% {
      opacity: 0;
      transform: translateX(-100%);
    }
  
    100% {
      opacity: 1;
      transform: translateX(0%);
    }
  }