foundations

The principles every screen follows, and the rules underneath every component.

• principlesFive principles that decide what a screen does and what it leaves out.
• accessibilityScreens everyone can use: the standard we meet, how it is checked, and what is still missing.
• content & voiceHow the words on a screen are written: two voices, one per typeface, short and true.
• meaningful textWhere the words on a screen come from, what they leave out, and how people and agents check them before they ship.
• interactionStates, focus, the keys and selecting rows: the same in every component.
• layoutOne scale for space, three control heights, density, and screens that work on a phone.