biblatex-zotero/polycopié.css

@media print{
    @page {
        size: A4;
        margin: 10mm 15mm;
        bleed: 6mm;
    }
    @page:left {
        margin-left: 25mm;
        margin-right: 15mm;
    }
    @page:right {
        margin-left: 15mm;
        margin-right: 25mm;
    }
    h2 {
        break-before: page;
    }
}