The UI was light everywhere except the embedded terminal, which felt
disjointed. Switch to a cohesive dark palette with layered surfaces,
tinted state colors for pass/fail/warn/flag, and polish on buttons,
cards, overlays, and the question nav (hover/active states, shadows,
custom scrollbars).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
