সিএসএস transform-style

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>

.parent {
  position: relative;
  height: 200px;
  width: 200px;
  margin: 10px;
  padding: 10px;
  border: 1px solid;
}

.flat {
  position: absolute;
  top: 100px;
  padding: 40px;
  border: 1px solid black;
  background-color: pink;
  transform: rotateY(60deg);
  transform-style: flat;
}

.preserve-3d {
  padding: 20px;
  position: absolute;
  border: 1px solid black;
  background-color: pink;
  transform: rotate(40deg);
  transform-style: preserve-3d;
}

</style>
</head>
<body>

<div class="parent">
  <div class="flat">প্রোগ্রামিং শিখুন</div><br>
  <div class="preserve-3d">প্রোগ্রামিং শিখুন</div>
</div>

</body>
</html>