Please elaborate as to how the login / password is created as well css is applied through the online page editor. I would be more inclined to purchase this if something built in is available with the extension to create page management.

Hello Drue.

Online page editor is add-on for Advanced HTML Editor 3
You can see how the extensions work by clicking on "Demos"
Tab from the product page.

Here is a video which will guide you through the basic features:

Features Overview of Online Page Editor Add-on

Regards: Vulcho.