1 - effet de retournement horizontal d&#039une animation 
<!DOCTYPE html>
<html>
  <head>
    <title>Titre du document</title>
    <style>
      .box {
      background-color: transparent;
      width: 220px;
      height: 300px;
      border: 1px solid #eeeeee;
      perspective: 1000px;
      }
      .box-inner {
      position: relative;
      width: 100%;
      height: 100%;
      text-align: center;
      transition: transform 0.5s;
      transform-style: preserve-3d;
      }
      .box:hover .box-inner {
      transform: rotateY(180deg);
      }
      .box-front, .box-back {
      position: absolute;
      width: 100%;
      height: 100%;
      backface-visibility: hidden;
      }
      .box-front {
      background-color: #cccccc;
      color: #111111;
      }
      .box-back {
      background-color: #8ebf42;
      color: #eeeeee;
      transform: rotateY(180deg);
      }
    </style>
  </head>
  <body>
    <h2>Boîte de retournement 3D (Horizontale)</h2>
    <p>Placez la souris sur la boîte pour voir l'effet:</p>
    <div class="box">
      <div class="box-inner">
        <div class="box-front">
          <h2>Face frontale</h2>
        </div>
        <div class="box-back">
          <h2>Face arrière</h2>
        </div>
      </div>
    </div>
  </body>
</html>