React Site Redesign

I have this site [login to view URL] in React where I would like to design it to make it look much better (you will notice how row it is). We do not need to change any functionality, just the frontend style. We do not need to add input search or animation. I do not have a clear idea how it should look, so you can feel free to make it look better as you wish. Please, also note that the design should be consistent for all pages. I will provide you with the source files of this React site.