Through trial and error, I discovered that the poem tag accepts the following style parameters:
display:table;
line-height:
font-size:
margin-left:
margin-right:
width:
However, it would be most helpful if it would include (if possible), the logical parameter of 'padding' and 'text-indent.' ~~~~
Try to pass simply a style. I'm using this trick into mul.source, coupled with S:mul:Template:AbsLeft. here a test code (test it into a wikisource sandbox):
<poem style="position:relative; padding-left:4em; border:1px red dotted; width:15em">
one
two
three
</poem>
Alex brollo (talk) 07:37, 16 February 2016 (UTC)