সিএসএস row-gap

<!DOCTYPE html>
<html>
<head>
<style>
.container {
  display: grid;
  row-gap: 20px;
}
</style>
</head>
<body>

<div class="container">
  <div>এইচটিএমএল</div>
  <div>সিএসএস</div>
</div>

</body>
</html>