Can't center email element

Can't center email element
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#1

I am working on product landing page. I am using the bootstrap library.

I am not able to center the email input in the form. I tried using 12 columns which fixes the issue but it is very large. I want it to occupy space of 6 columns but also align it in the center.

Codepen is here.


#2

Solved the problem by using offset.