Interactive CSS course straight from Google - completely free

The 'Learn CSS' page on web.dev is a practical guide for individuals looking to enhance their skills in cascading style sheets (CSS). This course offers a wide range of topics, starting from basics such as selectors and properties, to more advanced techniques. Users can expect interactive lessons that not only present theory but also allow practical application of the knowledge gained. The course is well organized, making it accessible to both beginners and those looking to systematize their knowledge. As participants progress, they learn how to create responsive and visually appealing websites, which is essential in today’s web development landscape.