CSS coding conventions - ompandeyy/aem-core-wcm-components GitHub Wiki

Most of the components available in this project have started employing the Block Element Modifier (BEM) notation [0] for their markup starting from version 2. This should greatly simplify the CSS rules for both the components themselves, but also for composed components, where super-components are assembled from AEM Core WCM Components.

To check if a component already uses the BEM notation head over to the README.md file of the component version you're interested in and check the BEM description section.

[0] - http://getbem.com/