Responsive Layout with CSS Grid

Good Work Yosep, happy you raise to do this great grid component.

To answer your question:

You don't need to write class for each element of html in order to select them into your style.css file. You can use pseudo-selector E.g: If you want to select the second <p> tag in your div with class price-per-month you might do like following :

.price-per-month >p + p { // some style ... }

And you will get the second <p>per month </p> and could style it without having give it a class name

Class are real on need for container box, button, and tags elements that have a lot of CSS features to add.

Hope I was able to answer your question Winata.