Material Design is a minimalist design that is based on the use of colors and shapes to give a professional design to mobile applications.
This application teaches you and allows you to add elements to your internet pages to give them that professional style that many aspire to.

You have the HTML, CSS and JavaScript code; no need to add heavy frameworks that just avoid customization.
Nor do you need to have advanced knowledge of these technologies, you just have to copy the code to learn how it works, in addition to that, you have images and descriptions of what each element is.