CSS, or Cascading Style Sheets, is a stylesheet language used to define the presentation and visual styling of documents written in markup languages such as HTML or XML. It controls how web page elements like text, colors, fonts, layouts, and other visual aspects appear on screens, paper, or other media

. Key points about CSS include:

• It separates content (HTML) from presentation (CSS), allowing web developers to manage the design and layout independently from the page structure

• CSS rules consist of selectors that target HTML elements and declarations that specify style properties and their values (e.g., color, font-size)

• Styles can be stored in external .css files, enabling consistent styling across multiple web pages and simplifying maintenance

• The "cascading" aspect means that styles can cascade from multiple sources and be applied hierarchically, with some rules overriding others based on specificity and order

• CSS supports a wide range of styling features including text formatting, layout design (like multi-column layouts), and special effects such as animations

In summary, CSS is an essential technology for web design that controls the look and feel of websites by styling HTML content efficiently and flexibly