Learn effective techniques for identifying and resolving CSS issues in this 23-minute video tutorial. Explore essential dev tools basics, discover how to spot and fix typos, invalid properties, and misplaced valid properties. Master the art of debugging responsiveness, overflows, and layout problems using outlines and background colors. Dive into specialized devtools features for grid and flexbox, and leverage Firefox's extra visualizations. Discover helpful browser extensions like VisBug and Polypane to enhance your CSS debugging workflow. Improve your web development skills and create more robust, error-free stylesheets.