Single price grid component

First things first, Congratulations on your solutions 🔥 I'm yet to submit a solution to this challenge btw. Here are a few pointers, You can use BEM methodology for making your HTML more semantic. That way, instead of using generic class names like txt-box1 you can use intro, subscription or even card

Also, Instead of using generic divs everywhere, you can use semantic tags like section, nav, article etc

Finally, I would suggest that you give class names to some of your tags like h1. So you don't repeat yourself by using same declarations for many tags. For instance

.text-box-1 h1 { 
Styles here
} 

// and later doing this : 
.text-box-3 h1{
styles here
} 

You can do it better, like this:

.heading__primary { 
styles
} 

Now you can use that single class for both text-box1, text-box-2 etc. Hope that helped.

Don't forget to upvote my feedback. Will be appreciated :)