content: import React from 'react';
  import { makeStyles } from '@material-ui/styles';
  
  const useStyles = makeStyles({
    '@global': {
      '.cssjss-advanced-global-root': {
        height: 100,
        width: 100,
        backgroundColor: 'blue',
      },
      '.cssjss-advanced-global-child': {
        height: 8,
        backgroundColor: 'red',
      },
    },
  });
  
  export default function GlobalCss() {
    useStyles();
  
    return (
      <div className="cssjss-advanced-global-root">
        <div className="cssjss-advanced-global-child" />
      </div>
    );
  }
  