Responsive calculator app using React JS

Hi everyone!

This is my first challenge after a very long break therefore I know my skills are a bit rusty. I'm very happy I managed to finish it and to do it with a bonus task. I know it'a far from perfection, probably especially accesibility - it's always been my weak point. Still, I'll be very happy and grateful for any feedback. In this challenge I decided to use React Hooks for the first time (when learning React I was using Class Components). Also for the first time I used styled components (they came with a resource I used for toggle switch). I hope those two elements were used properly in my project. I hope you find this solution interesting and some of the resources as useful as I did.