Unable to customize CSS

Hi Boris

Thank you for a great plugin. It has helped me a lot.
However, I have a problem. I want to align the Email field and the Subscribe button to the right as well as reduce the width of Email input field.

The text needs to be aligned right. Here is my URL: http://www.thesugarhabit.com/ and I want it to look like the top bar on: http://pinchofyum.com/blog

Can you help me in figuring out the CSS.

Best,
Lakshay

https://ww.wp.xz.cn/plugins/optin-forms/