@media print {
    /* add page numbers */
    @page {
        @bottom-center {
            counter-increment: page;
            content: counter(page, decimal);
        }
        @top-center {
            content: "";
        }
    }
    /* code styles */
    html body pre {
        page-break-inside: auto;
    }
    html body pre code {
        text-wrap: wrap;
    }
}