Thank you very much for sharing the same concerns. :) So, it seems I misinterpreted the intentions, it seems I jumped to conclusions because the majority of "web applications" make use of NodeJS, so I assumed that was the case too.
I don't know much about differences between GTK+, Qt, HTML+CSS, but if what you said is indeed the case, then I guess that's OK. However, I must note that, if I remember correctly, I was told that it's possible to do some CSS styling for GTK+. Knowing a little bit of CSS, I would recommend keeping animations, coloring, and format in CSS instead of JavaScript.
