Hi – glad you’ve got it (mostly) integrated and looking good!
We’ve got some great guides to customizing things and adding your own CSS in our Themer’s Guide (this section in particular, which covers setting up a tribe-events.css file to contain your new rules).
To set the title and description to black you could add something like this within that new stylesheet:
#tribe-events-content .tribe-events-tooltip .tribe-events-event-body .entry-summary.description,
#tribe-events-content .tribe-events-tooltip h4 {
color: black
}
To remove the Recurring Event (see all) text you could try adding this to your theme’s functions.php file:
add_filter( 'tribe_events_recurrence_tooltip', '__return_empty_string' );
Does that help?