<main>
  
  <!-- tooltip block -->
  <div class="tooltip" data-direction="bottom">
    <div class="tooltip__initiator">
      <!-- element with tooltip hover call -->
      <i class="fa fa-info-circle"></i>
    </div>
    <div class="tooltip__item">
      Hello! I'm a pure css tooltip
    </div>
  </div>
  
  <!-- tooltip block -->
  <div class="tooltip" data-direction="left">
    <div class="tooltip__initiator">
      <!-- element with tooltip hover call -->
      <i class="fa fa-info-circle"></i>
    </div>
    <div class="tooltip__item">
      Hello! I'm a pure css tooltip
    </div>
  </div>
  
  
</main>

.tooltip {
  position: relative;
   
  &__item {
    position: absolute;
    min-width: 100px;
    padding: 20px;
    visibility: hidden;
    opacity: 0;
    background: white;
    transition: all .250s cubic-bezier(0, 0, 0.2, 1);
    color: #484848;
    border: 1px solid #cecece;
    border-radius: 3px;
    font-weight: 500;
    box-shadow: 0 2px 1px #bcbcbc;
    z-index: 4;
    &:after {
      content: "";
      display: block;
      position: absolute;
      width: 0;
      height: 0;
      border-style: solid;
    }
  }
  
  &__initiator {
    cursor: pointer;
    z-index: 5;
  }
  
  &[data-direction="left"] {
    
    .tooltip__initiator:hover ~ .tooltip__item {
      transform: translate3d(0, -50%, 0);
      visibility: visible;
      opacity: 1;
    }
    
    .tooltip__item {
      top: 50%;
      right: calc(100% + 1em);   
      transform: translate3d(15px, -50%, 0);

      &:after {
        top: 50%;
        right: -0.5em;
        transform: translate3d(0, -50%, 0);
        border-width: 0.5em 0 0.5em 0.5em;
        border-color: transparent transparent transparent white;
        -webkit-filter: drop-shadow(1px 2px 1px #bcbcbc);
        filter: drop-shadow(1px 2px 1px #bcbcbc);
      }
    }
  }
  
  &[data-direction="bottom"] {
    
    .tooltip__initiator:hover ~ .tooltip__item {
      transform: translate3d(-50%, 0, 0);
      visibility: visible;
      opacity: 1;
    }
    
    .tooltip__item {
      top: calc(100% + 1em);
      left: 50%; 
      transform: translate3d(-50%, -15px, 0);

      &:after {
        top: -0.5em;
        left: 50%;
        transform: translate3d(-50%, 0, 0);
        border-width: 0 0.5em 0.5em 0.5em;
        border-color: transparent transparent white transparent;
        -webkit-filter: drop-shadow(1px 2px 1px #bcbcbc);
        filter: drop-shadow(1px -1px 1px #bcbcbc);
      }
    }
  }
}


.fa.fa-info-circle {
  font-size: 38px;
  color: #21606b;
}

// STYLES FOR CODEOPEN 
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: sans-serif;
  background: #dadada;
  font-family: 'Roboto', sans-serif;
}
main {
  flex: 1 1 100vh;
  min-height: 100vh;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
}