[css3-variables] Variables assignment not updated

*Hello,*

*When assigning these variables in a first file:*


*:root {*

*    --var-1: blue;*


*    --var-2: var(--var-1); *

*}*


*"--var-2" is not updated when "--var-1" is overridden in a second file.*


*:root {*

*    --var-1: orange;*

*    background-color: var(--var-2); // Background is still blue*

*}*


*It would be nice to have a feature like JavaScript proxy.*


*Regards,*

*Nicolas*