message: Just uses an even px value here; may be an issue at larger sizes, but is currently an issue with rendering button groups with negative border-width margins
diff: @@ -2,7 +2,7 @@ import styled, { css } from 'styled-components';
  import Styles from 'react/styles';
  -export const buttonBorderWidth = '0.075em';
  +export const buttonBorderWidth = '1px';
  export const buttonVerticalPadding = '0.75em';
  export const buttonHorizontalPadding = '1.25em';
  export const buttonPadding = `${buttonVerticalPadding} ${buttonHorizontalPadding}`;
  