- Arc geometry now uses chord-radius calculation for proper horizon intersection - Sunrise/sunset icons integrated at horizon endpoints (removed duplicate labels) - Daylight duration centered below arc - Increased all environment card heights 20% (140px → 170px) for better arc visibility - Visual balance: sunrise/sunset raised 10px, daylight at bottom 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>