body {
    margin: 0;
    padding: 40px;
    background: #fff;
    font: 80% Arial, Helvetica, sans-serif;
    color: #555;
    line-height: 180%;
}
h1 {
    font-size: 180%;
    font-weight: 400;
    color: #555;
}
h2 {
    clear: both;
    font-size: 160%;
    font-weight: 400;
    color: #555;
    margin: 0;
    padding: 0.5em 0;
}
a {
    text-decoration: none;
    color: #f30;
}
p {
    clear: both;
    margin: 0;
    padding: 0.5em 0;
}
pre {
    display: block;
    font: 100% "Courier New", Courier, monospace;
    padding: 10px;
    border: 1px solid #bae2f0;
    background: #e3f4f9;
    margin: 0.5em 0;
    overflow: auto;
    width: 800px;
}
img {
    border: none;
    max-width: 300px;
}
ul,
li {
    margin: 0;
    padding: 0;
}
li {
    list-style: none;
    float: left;
    display: inline;
    margin-right: 10px;
}
#preview {
    position: absolute;
    border: 1px solid #ccc;
    background: #333;
    padding: 5px;
    display: none;
    color: #fff;
}