CSS (Cascading Style Sheets) is a core technology in web design that controls the visual appearance and layout of web pages. It allows designers to specify how HTML elements should be displayed, styled, and positioned.
Here are some key concepts and techniques related to CSS web design:
Selectors: CSS selectors are used to target specific HTML elements for styling. There are various types of selectors, including element selectors, class selectors, ID selectors, attribute selectors, and more.
Style Rules: CSS rules define how selected elements should be styled. A rule consists of a selector and a set of declarations enclosed in curly braces. Each declaration has a property and a value, such as color: blue; or font-size: 16px;.
External CSS: You can include CSS styles in an external file and link it to your HTML documents using the tag. This approach helps separate the content and presentation, making it easier to maintain and update the styles across multiple pages.
Internal CSS: Alternatively, you can embed CSS styles directly within an HTML document by using the style tag. Styles defined within the style tag apply only to that specific HTML file.
Inline CSS: Inline styles are applied directly to individual HTML elements using the style attribute. For example, h1 style="color: red . Inline styles override external and internal styles.
Responsive Design: With CSS, you can create responsive web designs that adapt to different screen sizes and devices. Techniques like media queries and flexible layouts allow you to adjust the design based on factors like screen width, orientation, and resolution.
CSS Frameworks: Frameworks like Bootstrap, Foundation, and Bulma provide pre-designed CSS components and stylesheets that can speed up development and ensure consistent designs across different projects.