Iceberg Melting — Archimedes' Law & Sea Level (2D)

This 2D companion ports the 3D iceberg's Archimedes-law mechanic to a plain side view: an iceberg floats roughly 90% submerged, and raising the temperature slider melts it and eventually triggers calving, while a land glacier alongside it shrinks on the same clock. The sea-level readout barely moves as the iceberg melts — it already displaced its own weight in water — but climbs steadily as the land glacier adds new meltwater, making the sea-ice-vs-land-ice distinction that drives real sea-level rise directly visible.