CSS · Selectors and cascade

.class selector

Targets every element with that class. Classes are reusable and belong in stylesheets.

cssRunnable example css course

Syntax

.card { … }

Example

Try it

.demo.card { border: 2px solid #2f74c0; border-radius: 8px; }

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.