Center Form Fields & Make Submit button full width

I have tried several different suggestion I have found online I am now down to two issues that are driving me crazy.

I have created a multipage form and was able to remove the previous button. Now I want to style the submit button. Make text larger button wider. Nothing I have tried has worked.

The second issue is I want to center a form field and nothing I have tried has worked.

This css was supposed to do it but it got rid of the previous button so I have not edited yet, I need it to center content.

#gform_1 .ginput_container_address {
text-align: center !important;

#gform_1 .gform_page_footer {
justify-content: center !important;

#gform_1 .gform_previous_button {
display: none !important;

#gform_1 fieldset.gfield {
text-align: center !important;

Thanks in advance to anyone who is willing to give some feedback.

Hi Paul,

Could you please share your exact webpage URL so I can further investigate to resolve the issue?