7.css

7.css is a CSS framework for building interface components that look like Windows 7. It is built on top of the GUI backbone of XP.css, which is an extension of 98.css.

This framework relies on the usage of semantic HTML. To make a button, you'll need to use a <button>. Input elements require labels. Tabs rely on the role="tab" attribute. This page will guide you through that process, but accessibility is a primary goal of this project.

You can override many of the styles of your elements while maintaining the appearance provided by this framework. Need more padding on your buttons? Go for it. Need to add some color to your input labels? Be our guest.

This framework does not contain any JavaScript, it merely styles your HTML with some CSS. This means 7.css is compatible with your frontend framework of choice.