Hello.
Very often poetry printed books have numbered lines, normally every fifth line has its number, aligned to the left of the page. The lines of course all start flush, with a big indent (see attachment, and btw I'm sorry the first thing I found was possibly Italy's most overrated poem

)
How can I do this w/ epubs? Perhaps with a <span></span> around each number, which then I'd float to the left, or to which I'd give a negative indent?
Thanks