v0.5.7

Fixed

• CSS variable light-dark() support: primaryColor: 'var(--my-brand)' now works correctly when the variable's value uses light-dark() or any other browser-resolved syntax (relative oklch(), chained variables, etc.). Previously, getPropertyValue returned the raw token string which the resolver could not parse. The fix applies the variable to a temporary element's color property and reads back the browser-computed rgb() value instead.

Changed

• hsl/oklch/rgb resolver tests strengthened: tests now compare --brand-600 against the browser-computed equivalent rather than just checking the output matches a hex pattern. This validates correctness of the conversion math, not just the output format.
• Thread 4 demo page: --discuss-brand now uses light-dark(#dc2626, #0d9488) — red in light mode, teal in dark mode — to demonstrate CSS variable + light-dark() support end-to-end.