PROTEUS

Volume II

UI
Design

Interfaces are relationships
made interactive.

Eight studies on the structure, behavior, and responsibility of digital products.

The complete volume

From interval to system.

8 studies · Updated July 2026
01

Spacing

The intervals that make relationships visible.

18 minFoundationPrerequisite: None
Chapter 01
02

Components

Reusable behavior with clear boundaries.

20 minFoundationPrerequisite: Spacing
Chapter 02
03

Forms

Conversations that help people provide information.

22 minFoundationPrerequisite: Components
Chapter 03
04

Motion

Change over time used to preserve continuity.

17 minFoundationPrerequisite: Visual Hierarchy
Chapter 04
05

Navigation

Orientation, movement, and a reliable sense of place.

21 minFoundationPrerequisite: Hierarchy
Chapter 05
06

Responsive Design

Priority preserved across changing conditions.

19 minFoundationPrerequisite: Layout
Chapter 06
07

Accessibility

Design that remains perceivable and operable.

24 minFoundationPrerequisite: None
Chapter 07
08

Design Systems

Shared decisions that create coherent products.

26 minFoundationPrerequisite: All chapters
Chapter 08