Looking for any info on its principles, or anything really.
Looking for any info on its principles, or anything really.
It speaks to how successful Wine is that this is easily confused with a native screenshot.
I don't think it was an actual design change from Microsoft, just some transitional look-and-feel they adopted which sits between Office 2000 with the classic Windows 95+ look, and Office 2003 inheriting the Fisher-Price oversatured cartoony look of Windows XP.
Everybody wanted them :) 2000 or 2001, right? It was TBSTYLE_FLAT.
https://web.archive.org/web/20050930195959/http://download.m...
The overall UI still uses the Command Bars concept (merging of menus and toolbars) first used in Office 97.
What 'design language' are you speaking off? It was supposed to be HTML in the end (well whatever that meant in those editors :D)
Not sure if they even gave names to designs back then though, I believe it only became a thing during a design transition era some time ago (moving away from 'skeuomorphic' to 'flat design').