@media (prefers-color-scheme: dark){
    body {
        background:#111
    }
}
h1,h2,h3,p {
    color: #fff;
}
body{
    margin:1em auto;
    max-width:40em;
    padding:0 .62em 3.24em;
    font:1.2em/1.62 sans-serif
}
h1,h2,h3 {
    line-height:1.2
}
@media print{
    body{
        max-width:none
    }
}