v4/src/styles/theme.js

import mixins from './mixins';

const theme = {
  bp: {
    mobileS: `max-width: 330px`,
    mobileM: `max-width: 400px`,
    mobileL: `max-width: 480px`,
    tabletS: `max-width: 600px`,
    tabletL: `max-width: 768px`,
    desktopXS: `max-width: 900px`,
    desktopS: `max-width: 1080px`,
    desktopM: `max-width: 1200px`,
    desktopL: `max-width: 1400px`,
  },

  mixins,
};

export default theme;