I have a few areas I would like to change format. Which CSS elements should I modify to make sure that the styling is correct? Like the gentleman who was asking about the differing templates, I would like to make sure that changes that I incorporate do not have to be modified every time the plugin updates if possible.

Location 1:
The background of the event summary.


Location 2:
The alternating bars for the booking overview.


Thank you in advance for the wonderful support so far!