Screen flow

Basic flow of the participant app:

Home → Quiz (multiple questions) → Result → Ranking

Screen	Role
Home	Nickname, language, start
Quiz	Answer UI + feedback
Result	Correct count and score
Ranking	Today's leaders and your place

Wide layouts (e.g. tablets) show a navigation rail.

Question types

Type	Interaction	Correct when
Single choice	Pick one, submit	Matches the correct option
Multiple choice	Pick all that apply, submit	Exactly matches the correct set
Reorder	Drag handles, submit	Exactly matches the correct order

After submit, a full-screen feedback overlay appears; continue to the next question or to Result.