Open-source alternatives to Firefox Csshacks

mdui is a framework-agnostic UI library and design system based on Material Design 3 standards. It provides a comprehensive set of reusable interface elements implemented as native Web Components, ensuring compatibility across different JavaScript frameworks. The library features a sophisticated theming system that supports light and dark modes, as well as the ability to generate dynamic color palettes from seed colors or image sources. It distinguishes itself with a high level of flexibility in visual customization, using CSS custom properties to control design tokens such as typography, cor

This project is a CSS color utility library and palette framework designed to standardize the application of colors to text, backgrounds, and borders on the web. It provides a web color style system with predefined classes and defaults to accelerate the visual styling of web prototypes. The system utilizes skin-based color theming, allowing users to swap entire color palettes by changing top-level classes. It employs a utility class system backed by global CSS variable mapping to ensure visual harmony across different UI elements. The framework supports rapid UI prototyping and general web c

Framework7 is a mobile user interface framework and single-page application system designed to build responsive web applications with native iOS and Android appearances. It provides a comprehensive library of pre-styled components and a layout engine to create native-style user interfaces across multiple platforms. The framework utilizes a platform-aware theming system that adapts visual styles and color schemes based on detected device settings. It incorporates native mobile behaviors through a dedicated UI kit, including specialized interaction patterns such as pull-to-refresh and swipeable

shadcn-svelte is a collection of accessible and customizable user interface elements for Svelte applications. Rather than being distributed as a traditional dependency, these components are provided as source code that is copied directly into the project codebase. The library utilizes a registry-based distribution system, allowing users to install specific UI blocks and components via a command-line interface. This system uses JSON metadata to define dependencies and file paths, while a bootstrapping process automates the configuration of styles and CSS variables. The project integrates Tail

This project is a CSS theme for the Typora editor designed to emulate LaTeX typesetting standards. It functions as an academic document typesetter that transforms Markdown previews into formal layouts suitable for university-style papers and reports. The theme includes localized typesetting styles tailored for Chinese academic standards, providing specific fonts and HTML templates for generating professional cover pages, abstracts, and keyword sections. The system manages document typography, page margins, and multi-level list styling through CSS variables and override layers. It employs pri

Tamagui is a cross-platform user interface framework designed to build high-performance, themeable applications that share logic and styling across web and mobile environments. It functions as a comprehensive design system orchestrator, providing a collection of type-safe components that compile to optimized atomic CSS for the web and native code for mobile platforms. By utilizing a build-time compiler, the framework eliminates runtime overhead, ensuring consistent visual output and interaction behavior regardless of the target platform. The framework distinguishes itself through its advanced

GitHub-Dark is a browser extension theme and collection of user style sheets designed to provide a comprehensive dark mode aesthetic for the GitHub interface. It functions by injecting custom style rules directly into the browser to override default website colors, fonts, and layout properties, aiming to improve visual comfort and readability during extended use. The project distinguishes itself through its focus on deep integration and visual consistency. It includes specialized support for syntax highlighting across various programming languages and notebook environments, ensuring that code

UnoCSS is an atomic CSS engine and utility-first framework that generates styles on-demand based on the specific classes used in your source code. By scanning your project files during the build process, it produces only the CSS necessary for your application, effectively minimizing bundle size and eliminating unused styles. The engine distinguishes itself through a highly modular, configuration-driven architecture that allows for deep customization of design tokens, rules, and presets. It supports advanced styling patterns such as attribute-based styling, tag-based styling, and dynamic varia

Basecoat is a zero-runtime UI library and themable interface framework consisting of a set of accessible web components. It provides a collection of pre-styled interface elements and utility classes designed to function as static assets without requiring a dedicated JavaScript framework runtime. The project features a dedicated UI component scaffolder, providing a command line interface to automate the generation of project folder structures and the installation of component templates. Visual styles are managed through a system of CSS variables and utility classes, allowing for global theme a

Ionic Framework is a cross-platform UI toolkit and hybrid app framework used to build native-quality mobile and progressive web applications using HTML, CSS, and JavaScript. It functions as a web component library that enables the deployment of a single codebase across iOS, Android, and the web. The framework features a platform-adaptive design system that automatically switches the visual style of components to match the design patterns of the host operating system. It utilizes a web-component-based architecture with CSS custom properties for global theming and specialized bindings to synchr

This is a developer portfolio site built with Gatsby, designed as a single-page website to showcase a developer's projects, experience, and personal brand. The site is powered by Gatsby's static site generator, which uses a GraphQL data layer and file-based routing to produce an optimized static build for deployment on any static hosting service. The visual theme is controlled entirely through CSS custom properties, with a centralized set of variables for navy, slate, and accent colors that can be edited to customize the site's appearance. The user interface is constructed from reusable React

This project is a React UI component library and frontend UI kit designed to provide a collection of pre-styled user interface elements. It serves as a design system framework, offering standardized visual patterns to ensure a cohesive look and feel across different screens. The library focuses on design system implementation and frontend component architecture, allowing for the creation of modern websites and applications. It integrates directly into a React application workflow to accelerate the development of complex web layouts. The system utilizes a component-based abstraction and compo

Grade is a JavaScript library for image color analysis and dynamic theme generation. It extracts the most prominent colors from an image to automatically generate complementary CSS gradients and coordinated color palettes for web interfaces. The tool identifies dominant colors using pixel-data analysis and applies mathematical offsets to determine matching hues. It can inject these calculated values directly into the document as CSS custom properties or export the gradient data as a raw array for custom visual implementation.

Astrowind is a high-performance site framework and bootstrapping tool designed for building marketing sites, professional portfolios, and high-conversion landing pages. It utilizes a utility-first CSS architecture and a component-based UI library to assemble responsive websites. The project specializes in conversion rate optimization through targeted templates for lead generation, product sales, subscription captures, and pre-launch teasers. It includes specific infrastructure for static blogging, utilizing markdown-based content modeling and rendering for long-form articles. The framework c

luci-theme-argon is a visual interface for the OpenWrt administrative console that replaces the default look with a modern design. It provides a responsive web interface that automatically adjusts the administrative dashboard for usability on both mobile devices and desktop screens. The theme features a customizable login screen that supports custom images, videos, and transparency effects. It includes a dark mode interface with the ability to switch between light and dark color schemes manually or automatically based on system preferences. The project covers wide-ranging user interface cust

Ariakit is a headless component library and accessible UI component toolkit. It provides a set of unstyled web components with built-in accessibility patterns to ensure that screen readers and keyboard navigation function correctly. The project includes an adaptive color engine that calculates high-contrast text and dynamic surface colors for light and dark modes. It also features a concentric layout engine for computing nested padding, margins, and border radii for circular interface elements, alongside a design token system for managing global CSS variables. The toolkit covers broad capabi

Vuestic UI is a Vue 3 component library providing a collection of pre-made user interface elements. It serves as a responsive UI framework and a themed component system designed to speed up frontend development and maintenance. The toolkit features a centralized configuration system for global styling and dynamic branding, including a built-in dark mode. It includes an internationalized interface toolkit with native support for localization and translating application content for multiple languages. The library provides a set of accessible web components that meet accessibility standards for

Open Props is a CSS custom property library and design token set providing reusable variables for colors, typography, and layout. It functions as a CSS variable framework and design system intended to ensure visual consistency across components and platforms. The project includes an optimization toolkit for generating selector-scoped variable bundles and removing unused design tokens from stylesheets to reduce final file size. It also provides configuration files to enable design variable autocompletion within code editors. The system covers broader capabilities in adaptive web interface des

mvp is a classless CSS framework and minimalist library that applies default visual styles directly to standard HTML elements. It provides a customizable theme designed to create clean pages and polished interfaces without requiring the use of CSS classes. The system uses centralized CSS variables to manage global UI customization, allowing colors and fonts to be updated across the entire interface from a single location. This approach supports a rapid prototyping workflow for developing proofs of concept. The library covers the styling of standard HTML elements, including form controls, typ

Element Plus is a Vue.js UI component library and enterprise web design system used for building professional web applications with Vue.js 3. It provides a comprehensive set of pre-styled interactive components and tools designed for creating responsive user interfaces. The project includes a customizable component theme system for managing global CSS variables and dark mode palettes. It also features a Vue.js migration toolkit with automated transpilation tools to convert legacy UI code to current component standards. The library covers a wide range of capability areas, including high-perfo

StyleX is a type-safe CSS-in-JS library and atomic CSS compiler that transforms JavaScript style definitions into optimized static CSS and type-safe class names. It functions as a multi-framework styling tool, generating standard CSS assets compatible with various JavaScript UI frameworks and server components. The system includes a CSS design token system and theme engine for managing shared constants and composing visual schemes. It allows for the creation of light, dark, and custom themes through variable overrides and token inheritance. The project covers component styling through object

This project is a design system toolkit and component library that provides a framework-agnostic approach to building web interfaces. It centers on an HTML-first development model, utilizing standard markup and utility-based CSS classes to construct consistent, responsive layouts. The library is built upon the UIkit 3 framework, allowing for the integration of pre-styled interface elements while maintaining control over the underlying markup structure. It further extends these capabilities through web component encapsulation, using custom elements to provide modular and isolated interface log

Geist UI is a design system framework and React UI component library. It provides a collection of pre-styled, accessible components and design primitives used to maintain visual consistency across websites and applications. The framework includes a themed UI provider that manages application styles through a centralized system, enabling the switching of visual modes such as light and dark themes. It also features a responsive CSS grid system for organizing content into rows and columns that adapt to various screen sizes. The library covers accessible UI development using compliant markup and

Ant Design Mobile is a mobile UI component library and design system built for React. It provides a collection of pre-styled interface elements and standardized UI blocks used to create consistent, responsive user interfaces for mobile web applications. The framework focuses on mobile web design and frontend interface engineering, providing tools to implement interaction patterns tailored for touch-based browsing. It ensures a uniform look and feel across different mobile browsers and handheld device screens. The library incorporates responsive layout systems and CSS-variable-based theming.

LapisCV is a PDF document generator and resume builder designed to convert structured Markdown text into professional curriculum vitae. It functions as a rendering pipeline that transforms simple markup and variables into print-ready documents using a headless browser engine or LaTeX templates. The project provides a collection of professional themes and visual styles to customize the typography and branding of academic and professional resumes. It utilizes variable-based style injection to allow for the adjustment of fonts, colors, and margins based on content volume and user preferences. T

Buttons is a CSS button framework and UI component library providing a set of reusable visual elements for mobile and desktop web environments. It functions as a CSS utility system and variable-driven theming engine that enables the creation of consistent buttons using configurable typography and shapes. The system utilizes a modular CSS architecture where independent style and color classes are composed on single elements to produce varied visual effects, such as 3D or flat designs. It employs a declarative design framework that maps configuration options to real-time visual attributes via c

ring-ui is a web UI component library used to build consistent web applications through a shared set of reusable interface elements and standardized styles. It provides a foundation for web interface development, specifically supporting the creation of visual experiences for software extensions and plugins. The library includes a grid-based layout system for organizing screen content and maintaining responsiveness across different window sizes. It features a CSS variable theming system for applying consistent visual identities, a data table framework for rendering large datasets, and a form i