My solution for the order summary component challenge + dark mode

For this challenge, I tried to keep use of divs to a minimum, but still had to use them a fair bit, especially for the plan box. I didn't know how to separate and arrange the elements in the plan box without putting them in separate divs and classes. If there is a more elegant solution, please let me know, as I'm looking to develop good practices early on as a beginner. I also added a dark mode option to try to implement the javascript I'm still learning, and also make the solution a bit more unique. I was able to find a resource that helped me do it. I'm sure it maybe doesn't follow best UI design practices as I'm still learning that too. Also, this might be trivial, but if someone has tips on matching that overlay slider of our design to the original solution design, please let me know. I was wondering if it has to do with the way you take the screenshot. Thanks!