Alpha stage commit

design/map_layers.md

@@ -0,0 +1,32 @@
+# Map Layers
+
+## MVP layers
+
+- Route.
+- Stage boundaries.
+- Water.
+- Food.
+- Sleep.
+- Repair.
+- Bailout.
+- Warnings.
+- Rule cards.
+
+## Production layers
+
+- Surface/roughness.
+- Known/unknown access.
+- Protected areas.
+- Weather exposure.
+- Dry stretches.
+- Last-resupply-before-remote-section.
+- Local reports.
+- Heat/cold risk.
+- E-bike charging.
+
+## Visual language
+
+- Critical warnings should be visually distinct.
+- Uncertain data should look uncertain, not hidden.
+- POIs should default to route-corridor relevance.
+- Show stale data markers on POIs and rules.