Step 5 — Final Touches & Mileage Counter

Prompt: "Final touches: remove the background from city labels and make them bigger. Use a more interesting label animation. Reduce the dashed line gaps and stroke length. Add a large 'Total miles: XXXX' label in the top-left — the number should increase in real time as the plane flies, based on actual mileage. Show a shadow under the plane — the shadow distance should increase mid-segment (higher altitude) and decrease near cities."