Add design and product documentation

DESIGN.md

@@ -0,0 +1,16 @@
+# Design — Orbit Academy
+
+## Direction
+
+Neo-brutalist learning studio: cream, ink, acid accent, hard outlines, visible weekly artifacts, and playful but disciplined composition.
+
+## System
+
+- Preserve semantic tokens, strong borders, typographic hierarchy, and deliberate grid breaks.
+- Use artifacts and critique evidence instead of generic education illustrations.
+- Motion may feel energetic but must remain purposeful, performant, and reduced-motion safe.
+- Mobile maintains readable schedules, application steps, and artifact captions.
+
+## Intentional patterns
+
+Hard one-pixel borders and accent side rules are core identity, not detector violations when used consistently.