> For the complete documentation index, see [llms.txt](https://irena-popova.gitbook.io/boost-your-css-skills/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://irena-popova.gitbook.io/boost-your-css-skills/the-cascade.md). # The Cascade What is essential to know exactly how styles are rendered. Specifically, how different types of selectors work and how the order of those selectors can affect how our styles are rendered. It is also important to understand a few common property values that continually appear within CSS, particularly those that deal with colour and length. Let's begin by breaking down exactly how styles are rendered by looking at what is known as the cascade and studying a few examples of the cascade in action. Within CSS, all styles cascade from the top of a style sheet to the bottom, allowing different styles to be added or overwritten as the style sheet progresses. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://irena-popova.gitbook.io/boost-your-css-skills/the-cascade.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.