> For the complete documentation index, see [llms.txt](https://tmdarneille.gitbook.io/seirfx/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tmdarneille.gitbook.io/seirfx/03-html-css/css-responsive-design.md).

# Advanced CSS

## Objectives

* Define responsive design
* Name a reason that it is now important to consider variable screen sizes in your site design
* Discuss the purposes and benefits of responsive design
* Explain the purpose of the viewport meta tag in context of responsive design
* Utilize media queries to change a web page's layout
* Apply styling to special cases with pseudo-classes and pseudo-elements
* Use vendor prefixes to use experimental/nonstandard CSS properties

The world of CSS is **huge**, especially when it comes to the wide variety of techniques and properties used on webpages. We'll be touching on some of the other selectors and properties available.

* Responsive design
* Pseudo-classes and pseudo-elements
* Vendor prefixes