#cube {
    margin-left: auto;
    margin-right: auto;
    width: 50%;
    min-width: 400px;                                                               
    max-width: 1200px;
}

#cube dl {
    float: left;
    width: 35%;
    font-size: 120%;
}

#cube dl dd {
    margin: 1em;
    height: 9em;
}

#cube dl dt {
    font-size: 140%;
}

#cube h1 {
    font-size: 250%;
    margin-left: 1.2em;
    letter-spacing: .2em;
}