How to Create Login / Register Page ?
If you have a plan to link log in / register modal popup to a link or call to action then The popup model cannot be linked to a static URL so we can another solution for you. You can create a custom login page and then can link that page URL with the call to action.
For the Login page, you can create a separate page for it like You can create the new page to use the Login Page template
Then add this page to the main menu of the home page it shows at the menu, So when the user ( if not logged in ) click on this page then a complete login page will appear.
Now you can use this page in any section.
The login page URL will be like this
Place that static URL in the call to action so when the user will click on this call to action button he will be a move to the login page.