- Arc angle now proportional to day/night duration (day = daylight/24 × 360°) - Horizon points represent sunrise/sunset times - Day arc with sun icon and yellow/orange gradient - Night arc with moon icon and blue/indigo gradient - Position updates every 10 minutes aligned to clock (0/10/20/30/40/50) - Default to 07:00-17:00 when API data unavailable (asymmetric for visual effect) - All environment cards maintain consistent height in "no data" state 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>