Export CSS formatted note as PDF

How do I make a note with two columns (25% and 75% width) and export this as A4 PDF with no margin?

I now use the multi-column CSS with this addition:

    size: A4;
    margin: 0px;
    padding: 0px;

@media print{
    html, body{
        width: 210mm !important;
        height: 297mm !important;
        margin: 0px;

However, even though my note looks good in Obsidian:

The collumns/callouts overlap in the PDF and are not the entire width of the A4 page…

Some styles may change in print mode. You can check the print preview according to the Better Export PDF plugin, or open Developer Tools in Debug mode to see why the styles are not working.