.card_flip {
    perspective: 600px;
    position: relative;
    align-items: center;
  }
  .card_flip.is-switched .card__wrapper_flip {
    -webkit-animation: rotate 0.5s linear both;
            animation: rotate 0.5s linear both;
  }
  
  .card__wrapper_flip {
    transform-style: preserve-3d;
    -webkit-animation: rotate-inverse 0.5s linear both;
            animation: rotate-inverse 0.5s linear both;
  }
  
  .card__side_flip {
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
  }
  .card__side_flip.is-active {
    position: static;
  }
  
  .card__side_flip--back {
    transform: rotateY(180deg);
  }
  
  @-webkit-keyframes rotate {
    0% {
      transform: rotateY(0);
    }
    70% {
      transform: rotateY(200deg);
    }
    100% {
      transform: rotateY(180deg);
    }
  }
  
  @keyframes rotate {
    0% {
      transform: rotateY(0);
    }
    70% {
      transform: rotateY(200deg);
    }
    100% {
      transform: rotateY(180deg);
    }
  }
  @-webkit-keyframes rotate-inverse {
    0% {
      transform: rotateY(180deg);
    }
    70% {
      transform: rotateY(-20deg);
    }
    100% {
      transform: rotateY(0);
    }
  }
  @keyframes rotate-inverse {
    0% {
      transform: rotateY(180deg);
    }
    70% {
      transform: rotateY(-20deg);
    }
    100% {
      transform: rotateY(0);
    }
  }
  * {
    box-sizing: border-box;
  }
  
  
  h1,
  h2 {
    margin: 0;
  }
  
  .card_flip {
    margin: 2rem auto;
    max-width: 350px;
    align-items: center;
  }
  
  .card__side_flip {
    padding: 1em;
    border-radius: 5px;
    color: white;
    background-color: #ffffff;
  }
  
  .card__side_flip--back {
    background-color: #ffffff;
  }
  
  .btn_flip {
    outline: none;
    border: none;
    border-radius: 10px;
    padding: 6px 26px;
    font-size: 22px;
    text-decoration: none;
    margin: 20px;
    color: #fff;
    position: relative;
    display: inline-block;
    text-transform: uppercase;
    font-weight: 600;
  }
  .btn_flip:active {
    transform: translate(0px, 5px);
    box-shadow: 0px 1px 0px 0px rgba(0, 0, 0, 0.25);
  }
  
  .btn_flip--blue {
    background-color: #3575BB
    ;
    box-shadow: 0px 5px 0px 0px #3575BB
    ;
  }
  .btn_flip--blue:hover {
    background-color: #3575BB;
  }