Cascading Style Sheets (CSS): CSS is a stylesheet language used for designing the visual layout, appearance, and formatting of a website or web application. It works together with HTML (Hypertext Markup Language) which structures the content, and JavaScript, which adds interactivity. CSS allows you to control elements like font size, color, layout, and spacing, and enables you to maintain a consistent look across multiple web pages, as well as making your site responsive for different devices, like desktop, mobile, and tablets.
