emotion_js_css_prop_media_queries

* taken from emotionJS documentation

import { jsx } from '@emotion/core'

render(
  <div
    css={{
      color: 'darkorchid',
      '@media(min-width: 420px)': {
        color: 'orange'
      }
    }}
  >
    This is orange on a big screen and darkorchid on a small
    screen.
  </div>
)