Grim's take on Eva's sketch, draft part 2 — fat soft-edged bars, cubes, dark black borders. Nothing final until Eva says so.
Tap Pop it — the bar pops in, then fades away on its own. Lock it and it stays.
One shape, many sides. Flip to the side you need instead of opening another app.
Up/down triangles inside squares, so volume, brightness and screen controls fit in one bar.
Borders stay dark black in every scheme. Pick a shape and a color, cement it, and that's your bar.
Built on your system's own controls, the way Eva sketched it — existing widget / control center addons, not a reinvention. Draft only.