Notifications page || Fully Responsive Using HTML CSS AND JAVASCRIPT

1.What did you find difficult while building the project? On the targeting the elements span with class of icon and how to make the website responsive when click 2.Which areas of your code are you unsure of? uhhm I think theres nothing cause i review all of the code when i submit my solution 3.Do you have any questions about best practices? I just need some suggestion or tips in structuring the html and the css