html,
body {
    height: 100%;
}
body {
    font-size: 16px;
    font-family: "Open Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"
}
.xterm {
    height: 100%;
}