Material-ui: Prevent elements of Paper from affecting Paper margin

[RichardJECooke]

The 1rem top margin on a heading makes the Paper element move down, not the heading.

Code:

<Paper zDepth={1}>
  <h1 className='leftMargin topMargin'> Books</h1>
  <BookList />
</Paper>

Example:
See in this screenshot how the top of the paper is incorrectly 1rem down the page.

[nathanmarks]

overflow: hidden