<!-- Inspired by: https://try.alexa.com/marketing-stack/seo-tools/ and https://stratus.hr/

With help from https://24ways.org/2010/intro-to-css-3d-transforms/-->

<div class="container">
  <div class="row flip-boxes">
    <div class="col-md-3 col-sm-4 col-8 flip-box">
      <div class="front" style="background-image: url(https://images.pexels.com/photos/39811/pexels-photo-39811.jpeg?auto=compress&cs=tinysrgb&h=350);">
        <div class="content text-center">
          First<br>
          <span class="click-for-more">
          </span>
        </div>
      </div>
      <div class="back">
        <div class="content">
          First Back
        </div>
      </div>
    </div>
    <div class="col-md-3 col-sm-4 col-6 flip-box">
      <div class="front" style="background-image: url(https://thumbs.dreamstime.com/b/countryside-landscape-hillside-beautiful-scenic-view-river-rural-fields-summer-season-89540702.jpg);">
        <div class="content" >
          Second
        </div>
      </div>
      <div class="back">
        <div class="content">
          Second Back
        </div>
      </div>
    </div>
    <div class="col-md-3 col-sm-4 col-6 flip-box">
      <div class="front" style="background-image: url(https://llandscapes-ee1.kxcdn.com/wp-content/uploads/2017/09/33945202050_48027b6b38_z.jpg);">
        <div class="content">
          Third
        </div>
      </div>
      <div class="back">
        <div class="content">
          Third Back
        </div>
      </div>
    </div>
  </div>
</div>

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.flip-boxes {
  justify-content: center;
}
.flip-box {
  display: flex;
  align-content: stretch;
  min-height: 200px;
  flex-wrap: wrap;
  position: relative;
  border: 10px solid transparent;
  padding:0;
  border-top: 0;  
  -webkit-perspective: 1000;
          perspective: 1000;
  
  &:hover {
    .back {
      transform: rotateY(0deg);
      z-index: 10;
    }
    
    .front {
      transform: rotateY(180deg);
      z-index: -1;
    }
    
  }
  
  .back, .front {
    position: relative;
    background-color: #1b2d61;
    color: white;
    display: flex;
    justify-content: center;
    align-content: center;
    flex: 0 0 100%;
    -webkit-transition: all 1s cubic-bezier(.5,1,.5,1);
    transition: all 1s cubic-bezier(.5,1.3,.5,1.3);
    transform-style: preserve-3d;
    background-size: cover;
    background-position: center;
  }
  
  .back {
    background-color: #cecece;
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 100%;
    z-index: -1;
    transform: rotateY(-180deg);
    
    &:after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 30px;
      height: 30px;
      border: 15px solid transparent;
      border-bottom-color: white;
      border-left-color: white;
    }
  }
  
  .front {
    z-index: 10;
    
    .content {
      font-size: 2rem;
    }
    
    &:after {
      content: "";
      position: absolute;
      bottom: 0;
      right: 0;
      width: 30px;
      height: 30px;
      border: 15px solid #cecece;
      border-bottom-color: white;
      border-right-color: white;
    }
  }
  
  .content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    -webkit-transform: translateZ(50px);
            transform: translateZ(50px);
    text-shadow: 0px 0px 2px black;
  
  }
}