Earlier quoted context omitted.
Just checking that I understand your suggestion: it’s that you copy/paste Tailwind into a file called “designsystem.css” and then say that you are not using Tailwind? Or are you saying take their design system and use your own syntax for it (so it’s less complete than TW, less well-documented, and less transferable to/from the vast resources of the internet centered around TW)?
I'm talking about the design aesthetics included in Tailwind as default. Keep the values and the names if you want. Like this, for example: "blue-500" becomes --blue-500. That's it. This is a far cry from using Tailwind as a whole while keeping the good-looking aesthetics.
Of course it's not "it".
Now in every class that needs it, you also need to add
{
... other styles...
background-color: var(--blue-500);
}
And then you need to apply that class