One workspace view
Find custom-property definitions and usages across CSS, preprocessors, HTML, component files, CSS-in-JS, and supported Astro and Vite config sources.
CSS Variables LSP. Know which value wins.
Project-wide autocomplete, hover, navigation, rename, diagnostics, and color tools for CSS custom properties—not only the file currently open.
23k+ Zed downloadsRust native on six targetsTypeScript fallback
CASCADE ANALYZERWORKSPACE / READY
tokens.csstheme.cssbutton.module.scss
01:root {
02 --brand-accent: #e95c2f;
03}
05.button {
06 background: var(--brand-accent);
07}
--brand-accent✓ applies here#e95c2f · :root · specificity 0,1,0styles/tokens.css
Follow a variable through the whole project.
CSS custom properties are dynamic and contextual. The server keeps the speed of editor tooling while accounting for the cascade that decides what users see.
The value that applies
Hover accounts for !important, specificity, source order, and DOM context so competing definitions appear in useful order.
Move and refactor
Jump to definitions, find references, and rename variables across the indexed workspace without losing fallbacks.
Fix the rough edges
Diagnose undefined variables, create missing :root definitions, add fallbacks, and replace literal colors with existing tokens.
Workspace-wide completion, for real.
A real Zed session running the Rust LSP. Suggestions include variables indexed from Astro, HTML, Svelte, SCSS, and JavaScript sources. Supported config is statically analyzed; arbitrary JavaScript is never executed.
Choose the shortest install path.
Dedicated clients for VS Code and Zed; standalone Rust and TypeScript servers everywhere else.
Install the extension
Native Rust servers for major platforms with a TypeScript fallback.
Install from Zed
Native server discovery, download, caching, and fallback resolution.
Run the Rust server
Use Neovim, Helix, Emacs, or any client that launches an LSP over stdio.
Use the npm server
The TypeScript implementation remains available for Node-compatible environments.
Native first. Portable by design.
Four public components share one product surface while staying useful on their own.
VS Code
Bundled native binaries with an automatic TypeScript fallback.
Zed
Native discovery, download, caching, and fallback resolution.
Rust LSP
Fast standalone server and embeddable library for every LSP client.
TypeScript LSP
Universal npm distribution for Node-compatible environments.