permissions for _every file_ under public_html should be

-rw-rw-r--

permissions for _every dir_ under public_html and public_html should be

drwxrwsr-x

ownership for both files and directory should be either
www:user
or
user:user

where user is the specific users name.

In /html/res/ is shuld be
-rw-r--r--

and owned by

www:users
 
(and I mean 'users')