PdfCSS:Unfolding

@page{
    size: A5;
    margin: 5mm 10mm 10mm;
}
@page:first{
    background: lavenderblush;
    color: magenta;
}

body{
    font-size: 10pt;
}
div#cover{
    break-after: always;
    text-align: center;
}
div#cover h1{
    font-size: 250%;
}