text: export default theme => ({
    a: {
      alignItems: 'center',
      borderColor: theme.palette.grey[200],
      borderRadius: 2,
      borderStyle: 'solid',
      borderWidth: 1,
      color: theme.palette.text.primary,
      display: 'inline-flex',
      justifyContent: 'center',
      margin: '0 auto',
      paddingBottom: theme.spacing.unit * 2,
      paddingLeft: theme.spacing.unit * 3,
      paddingRight: theme.spacing.unit * 3,
      paddingTop: theme.spacing.unit * 2,
      textDecoration: 'none',
    },
    footer: {
      display: 'block',
      marginTop: theme.spacing.unit * 2,
      textAlign: 'center',
    },
    img: {
      borderRadius: 2,
      display: 'block',
      height: 48,
      margin: 0,
      padding: 0,
      width: 48,
    },
    signature: {
      marginLeft: 16,
    },
    span: {
      display: 'block',
      marginBottom: theme.spacing.unit,
    },
  });
  