Change Size of Buttons & Textbox Throughout Site

I would like to change the size of the buttons and textboxes on my site in order for them to be centered and even. Can someone please assist in doing so?

Attached are photos of what they look like now. See how the “Subscribe” button is extended to the right and the text boxes are short?

Website is:

Hi @huynhnwhere,

I hope you are well today and thank you for your question.

You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.

Admin Area -> Appearance -> Customize -> Additional CSS

input {
    max-width: 100%;

Best Regards,