🐛 Bug: Books dropdown blocks layout underneath itself

[JoshuaKGoldberg]

Bug Report Checklist

• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the bug I would like to report.

Expected

The area underneath Books should be clickable as if the menu isn't there.

Actual

The menu always exists; hovering with a mouse in that visual space makes it appear. That means you can't click any UI there. Annoying.

Additional Info

No response