CSS bug in mobile menu

[circus2271]

Mobile menu is initially open when page loads. Then it closes. It should be closed by default

Here is a short video of what's happening:

VID_20250705182754.mp4

There was a similar bug in djangoproject.com main repository. It was fixed by changing some css and js (django/djangoproject.com#1423)

[P-r-a-n-a-v-i]

“I’m a new contributor. Can I work on this issue?" #264