html {
    background: white;
}
body {
    max-width: 1200px;
    margin: 0 auto 0 auto;
    padding: 20px;
    border: solid 1px darkgreen;
}
.ifex {
    min-width: 50%;
    height: 200px;
    background: white;
}
p {
    font-size: 13pt;
}
pre {
    font-size: 12pt;
}