@flugschwein;
Thank you very much for your comments and review.
You are right about .css and .js files out of the main.html.
For .css, I am using Google Web Designer so it is always inside.
For .js , well I am coming from Commodore64 times where everything was all one code and there was a command like GoTo :)
But I agree with you, I have to get the habit.
For next project, I will do this.

FD.