[linmer]

Hmm. by kashida do you mean something like 'ایـــــــــــــن'?

I don't think you mean this, because I don't know how would you do it in CSS. Looks more like a problem to be solved with different types of character than styling.

You may want to explain more.

[mohsen1]

there was some attempts to make this happen back in the days. see text-kashida-space. if drop letters are something CSS can own, why not kashida?