The first thing to understand is that every CSS property has a default value called the initial value. Many CSS properties can be inherited from their parents. A given HTML element that is nested ...

Learn how to use CSS preprocessors like Sass or Less to write more efficient and maintainable stylesheets that simplify the inheritance and cascade of your styles.

You can also use the CSS property all to set these values for (almost) every property. This can be a convenient way to "start from a clean sheet" for a certain element. The cascade: how conflicts are ...