Changes:
- Removes redundant styles now inside Codex
- With the new component, it's not possible to display 3 cards in a
single line at a tablet resolution, so the media query responsible
is bumped to apply only at the desktop threshold
- Decisions are documented in ADR
Bug: T286835
Change-Id: I493e8e601ccc31b3cf1f16c0b5a8975f12ef336c
