CSS Custom Properties: The Modern Way to Manage Design Tokens

CSS custom properties (also called CSS variables) landed in browsers in 2016 and are now supported everywhere. If you're still using Sass variables or hardcoded hex values throughout your CSS, this guide will show you what you're missing — and why custom properties solve problems that preprocessors can't. The basics /* Declare a custom property on :root */ :root { --primary : #2f855a ; --primary-light : #48bb78 ; --spacing-md : 1rem ; --border-radius : 8px ; } /* Use it anywhere */ .button { bac