XF 1.5 Responsive Feedburner Email Subscription Box ?

[Surendra.S]

Hi All,

Please help me with any pointers / HTML code for : Responsive Email Subscription Box

(I want to display this box after the first post in every thread, so that users will be able to subscribe for Feedburner email alerts.)

But it should be responsive/resizeable just like Xenforo threads.