<div class="container">
<div class="post-card">
  <div class="post-card-inner">
    <div class="post-card-front">
      <div class="egypt">
        <div class="sky"></div>
        <div class="pyramids"></div>
        <div class="bottom">
          <div class="text">EGYPT</div>
        </div>
      </div>   
    </div>
    <div class="post-card-back">
      <div class="postCard">POSTCARD</div>
      <div class="address">
        <p class="name">John Doe</p>
        <p class="street">123 Oxford Street</p>
        <p class="city">123, London</p>
        <p class="country">United Kingdom</p>
      </div>
      <p class="greetings">Dear John,</br></br>
  WISH YOU </br>WERE HERE!</br>Lena, xxx </p>
      </div>    
    </div>
  </div>
</div>
body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.container {
  position: relative;
}

.post-card {
  background-color: transparent;
  width: 400px;
  height: 300px;
  perspective: 1000px;
}

.post-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2), 10px 18px 20px rgba(0,0,0,0.2);
}

.post-card:hover .post-card-inner {
  transform: rotateY(180deg);
}

.post-card-front, .post-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.post-card-front {
  background-color: #e9c46a;
  border: 10px solid #fff;
}

.egypt {
  position: absolute;
  overflow:hidden;
  width: 400px;
  height: 300px;
}

.sky {
  position: absolute;
  border-radius:50%;
  background-color: #fefae0;
  width:100px;
  height:100px;
  top:30px;
  left:230px
}

.sky:before {
  content:"";
  position: absolute;
  width:0;
  height:0;
  border-left: 390px solid rgba(255,255,255,0.2);
  border-top: 30px solid transparent;
  border-bottom: 30px solid transparent;
  left:-230px;
}

.sky:after {
  content:"";
  position: absolute;
  width:0;
  height:0;
  border-bottom: 20px solid transparent;
  border-top: 20px solid transparent;
  border-right: 300px solid rgba(255,255,255,0.2);
  top:70px;
  left:-170px;
  transform: skew(45deg);
}

.pyramids {
  position: absolute;
  left:-25px;
  height:0;
  width:0;
  border-bottom: 200px solid #f4a261;
  border-right: 150px solid transparent;
  border-left: 150px solid transparent;
  top:90px;
}

.pyramids:before {
  content:"";
  position: absolute;
  height:0;
  width:0;
  border-bottom: 200px solid rgba(0,0,0,0.2);
  border-right: 150px solid transparent;
}

.pyramids:after {
  content:"";
  position: absolute;
  height:0;
  width:0;
  top:20px;
  border-bottom: 200px solid #e76f51;
  border-right: 150px solid transparent;
  border-left: 150px solid transparent;
}

.bottom {
  position: absolute;
  width: 400px;
  height:50px;
  background-color: #264653;
  top:250px;
}

.text {
  font-size:50px;
  color: white;
}

.post-card-back {
  background-color: #faedcd;
  border: 10px solid #faedcd;
  transform: rotateY(180deg);
  overflow: hidden;
}

.postCard {
  margin-top:30px;
}

.postCard:before {
  content:"";
  position: absolute;
  width:3px;
  height:200px;
  background-color: #333;
  left:200px;
  top:70px;
}

.postCard:after {
  content:"";
  position: absolute;
  height:3px;
  width:150px;
  background-color: #333;
  top:150px;
  left:230px;
  box-shadow: 0 30px #333, 0 60px #333, 0 90px #333;
}

.address {
  position: relative;
  top:0;
}

.address:before {
  content:"";
  position: absolute;
  width: 60px;
  height: 70px;
  border: 5px solid #333;
  outline-style: dashed;
  outline-color: #333;
  background-color: #cb997e;
  top:-40px;
  left:320px;
}

.address:after {
  content:"";
  position: absolute;
  border-radius: 50%;
  border-style: dashed;
  width: 50px;
  height: 50px;
  top:10px;
  left:290px;
}

.name, .street, .city, .country, .greetings {
  font-family: 'Brush Script MT', cursive;
  font-size:20px;
  position: absolute;
}

.name {
  left:250px;
  top:60px;
}

.street {
  left:250px;
  top:90px;
}

.city {
  left:250px;
  top:120px;
}

.country {
  left:250px;
  top: 150px;
}

.greetings {
  left:40px;
  top:100px;
}
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