[ajanuary]

Not really. Tailwind lets you configure your own spacing and breakpoints. You get to pick what those numbers mean.

[deprecative]

That's just a CSS variable. You don't need Tailwind for that.

[cantSpellSober]

They are CJS modules or (ideally) Typescript. CSS custom properties (variables) are slightly different.

    import type { Config } from 'tailwindcss'
    
    export default {
      content: [],
      theme: {
        extend: {},
      },
      plugins: [],
    } satisfies Config

(not arguing for or against TW here)

[ajanuary]

Never said you did. I was just explaining that you aren't "using someone else's padding and margin classes".