The information you provide contains nothing to comment on.
to make the forum more secure
Extremely wrong.
I don't know what forum admin you were, but:
1. A good admin makes a software update without the users understanding.
2. A good admin always waits 1-2 weeks after an update is released before applying it. There are also some cases where security holes appear in a software update and it is less secure than the previous version.
3. Software updates are prepared very carefully by the authors of the software and in most cases the job of the admin is to just press the "update" button.
4. When a security error is detected, a patch is issued to correct the error, rather than an update.
For years, fonts have tended to be at least 16 in size, and even better 18.
I don't dig into the Beta Forum style files, but my impression is that it's smaller than 14.
Not serious and uncomfortable.