How to prepare a mobile version of the site for night mode, which is available on phones?

Question

Mobile development

Good afternoon.
There is a site.
There is a client who uses a phone with night mode.
The night mode on his phone takes blacks and whites and swaps them.
In this case, all other colors remain untouched.
The page cannot be read.
How can I fix this problem at the code level?
UPD:
samsung galaxy 9 phone
site https://italia-v-tarelke.ru/whatsapp
standard browser