roa-mirage/src/theme/gridSettings.js

[Live Demo of the Pattern Library](https://mealeyst.github.io/mirage/)

export default {
  columns: {
    mobile: 4,
    tablet: 10,
    desktop: 12
  },
  margins: {
    mobile: '3%',
    tablet: '7%',
    desktop: '7%'
  },
  gutter: '10px'
}