Do you use bootstrap or any css framework? It would simplify the designing process a lot. Another thing I was thinking... which size unit do you use for fonts? I mean do you use absolute unit like "px"? if it's so haven't you think on changing it for any relative one like "em" unit for example? It would help you a lot with those height problems though. I hope my suggestion can be helpfull for you and I want to comment that your design seems amazing!