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HTML

              
                <div class="flip-box">
  <div class="flip-box-inner">
    <div class="flip-box-front">
      <h2>Front Side</h2>
    </div>
    <div class="flip-box-back">
      <h2>Back Side</h2>
    </div>
  </div>
</div>
              
            
!

CSS

              
                * {
  font-family: 'Arial', sans-serif;
}

/* The Container for Flip Box - Set the width and height to whatever you want. */
.flip-box {
  background-color: transparent;
  width: 300px;
  height: 200px;
  perspective: 1000px; /* Remove this if you don't want the 3D effect */
}

/* This container is needed to position the front and back side */
.flip-box-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

/* Do an horizontal flip when you move the mouse over the flip box container */
.flip-box:hover .flip-box-inner {
  transform: rotateX(180deg);
}

/* Position the front and back side */
.flip-box-front,
.flip-box-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Style the front side */
.flip-box-front {
  background-color: #e1e1e1;
  color: #000;
}

/* Style the back side */
.flip-box-back {
  background-color: #20232c;
  color: #FFF;
  transform: rotateX(180deg);
}

              
            
!

JS

              
                
              
            
!
999px

Console