Good start point but…

1) I cannot make more project (then, what is the utility of “Project Slug” in url? – i’ve removed!);
2) In details i’ve: “Client”, and no way to change in other (author, or any other possible text).
3) Format post type contain only: “Standard, Immagine, Video, Galleria, Audio” – something missed here (eg: “Quotes”).
fixed with:

[ Moderator note: code fixed. Please wrap code in the backtick character or use the code button. ]

.project-client {
    visibility: hidden;
}
.project-client > .project-data {
    visibility: visible;
    float: right;
}
.project-client > .project-data::before {
    content: "Author: ";
}

4) article (content) slug cannot be edited (so sad!).

then, just need some fix, but can be a great plugin 😉