1  body {
 2    margin: 0;
 3    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
 4      'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
 5      sans-serif;
 6    -webkit-font-smoothing: antialiased;
 7    -moz-osx-font-smoothing: grayscale;
 8  }
 9  
10  code {
11    font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
12      monospace;
13  }