Resp job listing page -React + styled components

What did you find difficult while building the project? Items filter, this logic was really hard for me. I based it on states but keep it as a one was really hard -.- Did I overthink this ?

Which areas of your code are you unsure of? Styling with a side scrollbar, when it disappears, the entire page makes a small jump to the right. Also the website lacks animation which makes it look heavy but I opted for stylized components, next time I will definitely choose sass :p

Do you have any questions about best practices? Is there any good basic lib helping with state filtering?