Adjusting Vertical Position of Text on Search Submit Button

I need to make some visual adjustments to the search feature. Specifically I need to make it smaller in height as well as decrease the size of the text used. I have been able to do that, however when I resized the search field as well as the submit button, the text on the submit button doesn’t move and is cut off. I can’t figure out where or how to move that up vertically. You can see where I added the search on the page linked below right above the four images/visuals and below the, “There’s power in knowledge…” text. Any help on how to adjust/move that text up so it is centered beside the search field would be great.