PHP Login Secure Page

[Cezar_]

Hello, I'd like to request a login page for my staff, the page will cover an entire subdomain like "staff.domain.com", avoiding people to enter "staff.domain.com/aslajid" or something.
The page will have sessions to let people login automatically after they leave the browser.
We use MariaDB, Nginx with cloudflare ssl certificates with origin certificate check (dunno if you need to know this, but the more the better) and Php 7.3
For the style, well... I don't know, if it's possible give the possibility to change the style like the logo, or some css (I actually don't know if php uses it) and stuff.

Kind Regards,
Cezar

 

[CerealKillahh]

Can you add me on discord so we can talk easier ?
CerealKillahh#8026