CSS Easy Problem

Hello, this line under search bar is plus, idk what i did i was correcting latest news and stuff and i did expand that line for a little, but when i use margin-top, height and stuff like i make it normal again but some other things got messed up for example on mobile search interface it screws up, tell me what code and where should i put so that line will be normal. Here is SS: http://prntscr.com/l7lqb9

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