Key Takeaways Start with basic concepts like selectors, properties, and box model before moving to layouts.Use online tools ...

2. Use specific styles Don't apply styles to universal selectors, descendent selectors and top-level HTML elements. Doing so can trigger many Boolean evaluations. Instead, optimize CSS performance ...

To do this, start with the element name, then write the period (.) character, followed by the name of the class. So no, Google does not use the CSS .class selector for this purpose.

In CSS, we write code to target and select specific HTML elements on our page. We can then use a huge number of available CSS properties to style those elements.