#container{
    max-width: 480px;
    width: 100%;
    margin: 20px auto;
}
#demo_box{
    width: 80px;
    visibility: hidden;
}
.fa{
    font-size: 40px;
    line-height: 70px;
}
.fa-bars{
    color: #fff;
    opacity: .8;
}
pre{
    font-family: Consolas,Liberation Mono,Courier,monospace;
    font-size: 13px;
}
@media screen and (orientation: portrait){
    pre{
        overflow-y: scroll;
    }
}
ul {
    opacity: .9;
}