Looks good. ---
I suspect there's some way to specify the styles more compactly, but I don't know enough css to say. --- +table.borderless thead tr th, table.borderless tbody tr th, table.borderless tr th, +table.plain > thead > tr > th, table.plain > tbody > tr > th, table.plain > tr > th, I was surprised at the difference in syntax; why the ">" in one but not the other?
