I really like this. I hate doing layout in css.

I'm not sure if I missed it, but a few controls for the nodes would be cool (delete, swap with next, etc). I also couldn't focus the main node, after creating two nodes there. This was no problem, with the child nodes, because they shrink around the borders (which is amazing UX!).

Really cool project. Just curious, are you planning in open-sourcing it?

I was under the impression that css grid had become the preferred way to layout pages now over flexbox?

What's the purpose of the Content field? It doesn't seem to do anything

The intention was to change the content within the selected node. Thinking I'll either remove it as the focus is mainly on flex layouts, or add a code editor to modify content.

Not working on mobile?