/* Printed pages, from the browser's Print button and for the PDF the
   book's workflow makes: A4 paper with room around the text, and the
   page number at the bottom of each page. */
@page {
    size: A4;
    margin: 18mm 16mm;

    @bottom-center {
        content: counter(page);
        font-family: "Open Sans", sans-serif;
        font-size: 9pt;
        color: #555;
    }
}