The Tailwind v4 @theme inline block — maps each token to its utility variable (--color-background,
--radius-lg, --font-sans, breakpoints) referencing the :root custom properties, so Tailwind utilities
(bg-background, rounded-lg) resolve to the same source the CSS vars define.
The Tailwind v4
@theme inlineblock — maps each token to its utility variable (--color-background,--radius-lg,--font-sans, breakpoints) referencing the:rootcustom properties, so Tailwind utilities (bg-background,rounded-lg) resolve to the same source the CSS vars define.