V4 dev copy refresh

- This is the PR for v4-dev <> v4-dev-copy-update, replacing the incorrect master <> v4-dev-copy-update PR (now closed)
- Copywriting updates have been implemented on each view
- Some important new styles tweaks are implemented here, including a mobile layout fix and cleaner media queries
- There is a new view for the second time the user is asked about people they cook and prepare food with.