This is a fork of Computing Machine (or just CMachine) by Jamie Michelle, a "classic" GTK theme. I have made some very nomimal changes in the GTK3 theme itself, for example, disabled symbolic icons and on-hover highlighting. Beyond nominal changes, I have ported the theme to GTK4; feel free to test it out and open an issue if you have any suggestions.
Screenshot taken from original repository:
Screenshot of GTK4 Widget Factory with the GTK4 port of CMachine:
My changes are, like the original code, licensed under the GPL.