css-mastery-16-master/cssmastery-examples/chapter-12/workflow-project/_library.scss

$primary-color: #333;
$secondary-color: #fff;

@mixin font-smoothing($subpixel: false) {
    @if $subpixel {
        -webkit-font-smoothing: subpixel-antialiased;
        -moz-osx-font-smoothing: auto;
    }
    @else {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
}