old_contents: // @flow
  
  import { createGlobalStyle } from 'styled-components'
  
  const GlobalStyles = createGlobalStyle`
    * {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    color: #333;
    font-size: 14px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji',
    'Segoe UI Symbol';
    line-height: 1.5;
  }
  
  a {
    text-decoration: none;
    color: #4078c0;
  }
  
  a:hover,
    a:active {
      text-decoration: underline;
      outline-width: 0;
    }
  
  code {
    font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    font-size: 12px;
    color: #333;
    word-wrap: normal;
    white-space: pre;
  }
  
  hr {
    margin: 16px 0;
    border: 0;
    border-bottom: 1px solid #ddd;
  }
  
  input[type='text'] {
    min-height: 34px;
    padding: 6px 8px;
    font-size: 14px;
    line-height: 20px;
    color: #333;
    vertical-align: middle;
    background-color: #fff;
    background-repeat: no-repeat;
    background-position: right 8px center;
    border: 1px solid #ddd;
    border-radius: 3px;
    outline: none;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.075);
  }
  `
  
  export default GlobalStyles
  
new_contents: // @flow
  
  import { createGlobalStyle } from 'styled-components'
  
  const GlobalStyles = createGlobalStyle({
    '*': {
      boxSizing: 'border-box'
    },
    body: {
      margin: 0,
      color: '#333',
      fontSize: '14px',
      fontFamily:
        '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"',
      lineHeight: 1.5
    },
    a: {
      textDecoration: 'none',
      color: '#4078c0',
      '&:hover, &:active': {
        textDecoration: 'underline',
        outlineWidth: 0
      }
    },
    code: {
      fontFamily: 'Consolas, "Liberation Mono", Menlo, Courier, monospace',
      fontSize: '12px',
      color: '#333',
      wordWrap: 'normal',
      whiteSpace: 'pre'
    },
    hr: {
      margin: '16px 0',
      border: 0,
      borderBottom: '1px solid #ddd'
    },
    'input[type="text"]': {
      minHeight: '34px',
      padding: '6px 8px',
      fontSize: '14px',
      lineHeight: '20px',
      color: '#333',
      verticalAlign: 'middle',
      backgroundColor: '#fff',
      backgroundRepeat: 'no-repeat',
      backgroundPosition: 'right 8px center',
      border: '1px solid #ddd',
      borderRadius: '3px',
      outline: 'none',
      boxShadow: 'inset 0 1px 2px rgba(0, 0, 0, 0.075)'
    }
  })
  
  export default GlobalStyles
  
subject: Use object styles.