- The receding card must stay fully opaque; dimming it let the card
behind ghost through the title and chips on photo-led cards.
- Give the pinned stage top padding so the section label clears the
fixed nav, and a gap so the covered card does not clip the intro.
- Let the deck size to the space left in the stage, so it can never
overflow the viewport.
Ports the Stackless Coffee roast-log mechanic (pinned deck of cards
dealt on scroll) to the MEGA projects section: photo-led cards,
CSS sticky + rAF scrub, no new runtime dependency.
