Fill screen responsively with 20px margin

<!DOCTYPE html>
<html>

<head>
  <link rel="stylesheet" href="style.css">
  <script src="script.js"></script>
</head>

<body>
  <div class="fill-page-responsively-with-10px-margin"></div>
</body>

</html>


.fill-page-responsively-with-10px-margin {
  height: calc(100vh - 40px);
  width: calc(100vw - 40px);
  margin: auto;
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
  background-color: papayawhip;
}