Enable experimental.viewTransition in Next.js config. Wrap active section
in ViewTransitionWrapper so the browser cross-fades between sections on
navigation. Replace animate-fadeIn keyframe with @starting-style + CSS
transition for the initial render enter animation.
Replace ochre-clay, carbon-black, burnt-oxide, slate-indigo with clean
two-color system: --cream (#f4f0e8) and --blue (#041cf3). Update every
component, utility class, and test assertion.
Ilia Mashkov