Adjust width of newsletter form fields in stack layout

Site URL: https://kait-schmidek-new.squarespace.com/

I'm trying to adjust the width of newsletter forms fields in the stack design layout. I'd like them to span the full width of the newsletter container on desktop. Right now they look to be filling up about half of the container. 

URL: https://kait-schmidek-new.squarespace.com/
Site password: Kait

Scroll down to the bottom of the page and the form appears under "Website Content Worksheet"

Thank you!

Add to Design > Custom CSS

/* Home newsletter */
body.homepage {
.newsletter-form-fields-wrapper.form-fields {
    width: 100% !important;
    display: block !important;
}
.newsletter-form-fields-wrapper.form-fields>* {
    max-width: 100% !important;
}
.newsletter-form-field-wrapper {
    width: 100% !important;
    max-width: 100% !important;
}
.newsletter-form-button {
    width: 100% !important;
}}

@tuanphan Amazing! Exactly what I was looking for.