SASS nested namespace properties

test.css

#test {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 2em;
  margin-left: 20px;
  margin-top: 20px;
  padding-right: 50px;
  padding-left: 50px; }

test.scss

#test {
	font: {
		family: Helvetica, Arial, sans-serif;
		size: 2em;
	}
	margin: {
		left: 20px;
		top: 20px;
	}
	padding: {
		right: 50px;
		left: 50px;
	}
}