1  html {
 2      font-family: sans-serif;
 3  }
 4  
 5  body {
 6      margin: 40px auto;
 7      max-width: 650px;
 8      line-height: 1.6;
 9      font-size: 18px;
10      color: #444;
11      padding: 0 10px;
12  }