epub--> pdf: odd-even pagenum

Hello!

I am using the footer template to convert epbu--> to pdf and would like to have pagenum odd and even.

I've tried several code inputs over the past few days with no results. My results always end up with text-align right or left but not alternating for odd/even. For example:

<p style="text-align:LEFT"><span class="even_page">_PAGENUM_</span><span class="odd_page" STYLE="TEXT-ALIGN: RIGHT;">_PAGENUM_</span></p>

gives me all page numbers on the left.

Has anyone a footer code to share that places odd page number right side and even page number left side in footer?

Maybe I have to use <div></div> wrap and generate css in Look and Feel?
I haven't used the dialog yet other than examples placed in toc sampler code of Calibre manual.

Also, how to exclude page numbering for some pages, e.g. for table of contents epub file when converting to pdf.

Help is appreciated!