:root { @each $varName, $varDefault in $css-vars { --#{$varName}: #{$varDefault}; } } @media (prefers-color-scheme: dark) { :root { --background-color: #{$background-color-dark}; --text-color: white; --warning-background-color: #{$warning-background-color-dark}; --warning-border-color: #{$warning-border-color-dark}; --target-background-color: #{$target-background-color-dark}; --code-color: #{$code-color-dark}; --code-keyword-color: #{$code-token-color-dark}; --code-type-color: #{$code-token-color-dark}; --code-highlight-color: #{$code-highlight-color-dark}; } }