Hovering a transit raises a small card anchored to the bar. It stays while you move onto it, and offers a primary “View detail” action plus a quick glance. Lightweight, keeps you in the calendar. Planetary hours tint the grid behind the events — each unequal hour carries its ruling planet’s glyph and color, Saturn (day ruler) strongest.

Clicking a transit slides a detail panel in from the right — room for the full reading, timing, and related links without leaving the day. Hover still gives a subtle highlight so bars feel live. Same planetary-hour backdrop carries through behind the events.