Measure spacing and dimensions

I need exact spacing and dimensions across this screen before I hand it to front‑end. Measure padding, margin, and component heights for the header, hero card, and the three list items; put pixel values and the source frame name in a short table. Check the mobile and desktop frames named Release‑v1 and Release‑v1‑mobile and flag any mismatches over 4px.

Before I pass specs to engineering, make the spacing obvious: surface the main vertical rhythm at the top, show component heights next to each element, and highlight any gaps over 8px that break the grid. Call out where padding is inconsistent between Release‑v1 and Release‑v1‑mobile and suggest the single change that fixes both.

I just found the header padding is 12px on Release‑v1 and 20px on Release‑v1‑mobile; I am afraid engineers will pick the wrong one and the build will look off. I cannot tell whether the mobile spec was meant to be different or someone adjusted it by mistake. Do I enforce 12px, match mobile to desktop, or ask the designer who touched the mobile frame? Recommend the most defensible next move and a one‑sentence message to the designer.

Across releases I keep losing time reconciling small spacing differences that break CSS variables. Where should I change my habit: stop trusting copied frames, add a short prehandoff checklist, or gate handoffs with a quick spacing audit? Recommend the single habit to adopt, how to enforce it in two steps, and a one‑line rule to put in the design handoff note.