Denali CSS Framework

Denali CSS is a lightweight, flexible CSS framework developed by Verizon Media (now Yahoo) for implementing the Denali Design System. Current stable version is 2.5.1. It uses SCSS source files, supports theming via CSS custom properties, and is framework-agnostic. It offers a comprehensive set of UI components (buttons, forms, navigation, etc.) and is optimized for internal enterprise products. Release cadence is irregular; last update was in 2023. Unlike Bootstrap or Materialize, it is purpose-built for Denali's design language and emphasizes simplicity and customizability through variables.