Hi all, it is interesting discussion. Actually, most of what you discussed are big question for me because I know nothing about web programming. I just follow your posts and hardly think to understand. I am a journal editor, currently run OJS 2. I fall in love with OJS3 and want to use it as my journal. I have installed Boostrap and child theme in my OJS 3. When I activated child theme (I download https://github.com/NateWr/default-child), it seems the layout back to default theme. I searched the sample child theme, it looks great. Is there other ready-use child theme for OJS 3? or at least, documentation on how to customize it.