html, body {
    margin: 0;
    padding: 0;
    border: 0;
}
body {
    background-color: #ccf;
      font-size:0.875em;
}
#main {
    width: 80%;
    max-width: 800px;
    background-color:#fff;
    border: 2px solid black;
    margin: 2em auto;
    padding: 1em;
}
#example {
    width: auto;
    background-color:#fff;
    border: 2px solid black;
    margin: 2em auto;
    padding: 1em;
    float: left;
}
h1 {font-size:2.5em;}
h2 {font-size:1.5em;}