Learn how to create responsive websites that adapt to different devices using media queries in CSS. Explore the decision between mobile-first or browser-first design approaches, and see a practical example of responsive design in action. Discover how to use built-in browser tools for mobile development, set up media queries, define width breakpoints, and implement standard breakpoints for various screen sizes. Master the use of "only screen and" queries, handle landscape and portrait orientations, and learn to combine multiple width parameters for precise control over your website's responsiveness. By the end of this tutorial, you'll have the skills to ensure your web content looks great on any screen size, from smartphones to desktops.