Every colour, every typeface, every spacing unit. These are the non-negotiable building blocks. Every screen downstream uses exactly these values.
Each screen answers one question in under 3 seconds: is everything okay, and do I need to act? Priority order: CALM first (most seen), HELP second (highest stakes).
Empty states are the most underestimated screens. They appear frequently — and they either build trust or make users feel abandoned. Each one has a purpose and a feeling.
The Luma screen is ambient. It's seen from across the room, not held in the hand. Large type, minimal information, passive display. All interaction is voice. No buttons. No menus.