Making the Web-Page Full-Screen, across all screens and resolutions

Hello everyone,

I hope to find you well,

I would like to find a solution on the following matter:

I have a few pages not displaying text boxes correctly example below. 

Would like all texts and text boxes to match on all screens/resolutions.

Any help is much appreciated. Thanks!

website: https://macado-developments.squarespace.com/

password: password1