GTK4/LibAdwaita version breaks on higher font sizes

[Arcitec]

First off, thank you. This is the first theme that is reliable and beautiful enough to make me switch from vanilla GNOME to your theme!

Anyway, my mother has impaired vision and very large font sizes.

The GTK4 theme breaks in that scenario as follows:

Your transparent headerbar is hardcoded as some kind of fixed size. Instead of properly being parented to the headerbar dimensions of the window.

Here is the easy way to reproduce this bug:

• Install GNOME Tweaks.
• Go to Fonts - Interface Text.
• Set it to a very large font value until the titlebar in Flat Remix GTK breaks. :)

Hopefully (and most likely) it's possible to parent this to the proper CSS element to fill the entire, actual size of the headerbar.

[Arcitec]

Most likely related to https://github.com/daniruiz/flat-remix-gtk/issues/152.