The four ideas behind every decision in the system.
Plain
Nothing decorative. Every colour, border and shadow is there to make something clearer.
Familiar
Native HTML elements, the system font, conventions managers already know from the web.
Accessible
WCAG 2.2 AA out of the box: contrast, labels, focus and keyboard use are built in.
One way
Each thing has one recommended way to build it, so apps built by different people, and by AI, come out the same.