Vertically align logo in header?

Hey! So I’m trying to make the logo of my responsive site remain vertically centered (as the home menu and mobile toggle do). I’ve tried messing with every logo-related align setting in the style.css file. but nothing as seemed to work.

Any suggestions? And if you could include where any suggested css coding should be inserted (i.e. which line of code) that would be greatly appreciated!

(For extra clarification: I would like the center of the round part of my logo to stay level with the home menu, rather than having the logo move up/down as the window is resized.)