[ Frontend ]

No tailwind. Raw css.

Use only custom elements with JS implementation:

<login-header>

</login-header>


And than create for each a css:
Like login-header.css 

login-header
{
  display:block
}


[ Base Structure ]

For the user-managment create: 
create, login, logout, delete

For users create:
group-editing (creating, delete, adding/removings users/group )
project-editing creating, delete, adding/removings users/group )