Formatting css inside the template strings

Prettier doesn't seems to work with css inside the template string.

As a workaround, seems possible to enable formatting by using the styled-components helper function `css`

```jsx
export const SC = styled.div`
  ${breakpoint('lg')`${css`
    height: 100%;
  `}`}
`;
``` 

but as you can see, is doesn't look good, any alternatives?