*,body,#wrapper{
    font-family: monospace;
    color: lime;
}
body,html{
    background-color: black;
    width: 100%;
    height: 100%;
}
html{
    margin: 0px;
}
body{
    margin: 16px;
}

#wrapper{
    margin: auto;
    max-width: 40%;
    border: 2px solid lime;
    padding: 2em;
}