css kind of thing? I don't know what CSS has to do with this :) 

You can follow hashtags and the select them in the top of the page.  

 But you cannot seperate your feeds into multiple ones with different combinations of selectors.  

 Idk why but I cannot access your message. I get a notification and I see a counter under my message but I cannot see it.  

 Atleast I think it is your message. 

 Can you send a screenshot?