I am currently trying to make a multi-theme design system based on bulma. But I'm currently working on adding a multi-theme system.

I added this to my customstyle scss file but it doesn't seem to work

@charset "utf-8";


:root {
    --primary: red;
    --secondary: #068295;
}

body[class="light"] {
    --primary: #F7A800;
    --secondary: #068295;
}

body[class="dark"] {
    --primary: blue;
    --secondary: #068295;
}

$primary: var(--primary); // this works 
$background: blue;
$text-strong: red;

$secondary: #8BC91D; // this works but without theming
// $secondary: var(--secondary); // this doesn't work 
$secondary-invert: findColorInvert($secondary) !default;

$custom-colors: (
    "secondary":($secondary, $secondary-invert),
);

@import "../node_modules/bulma/sass/utilities/_all.sass";
@import "../node_modules/bulma/sass/base/_all.sass";
@import "../node_modules/bulma/sass/elements/button.sass";

When I run the node sass command to generate the css file I can see the is-secondary attribute generated when I don't use the variable, but when I use the variable to define my $secondary variable, the is-secondary attribute is not generated