Embark on a comprehensive CSS3 tutorial designed for absolute beginners, guiding you through the process of building a responsive website. Learn the fundamentals of CSS3 syntax, cascading styles, and web design principles. Start by setting up your development environment with HTML and CSS files, then explore essential concepts like CSS reset, default styles, and reusable classes. Master techniques for styling navigation bars, main content, and footers while implementing responsive design using media queries. Dive into advanced topics such as BEM naming conventions, pseudo-selectors, and Unicode symbols. Gain practical knowledge on using developer tools, addressing cross-browser compatibility issues, and optimizing your workflow with VS Code extensions. By the end of this tutorial, you'll have a solid foundation in CSS3 and responsive web design, equipped with the skills to create visually appealing and functional websites.