Mobile Logo sizing

Theme being used:
http://themeforest.net/item/total-responsive-multipurpose-wordpress-theme/6339019

Issue:
The logo uploaded looks fine on desktop and tablet, but on mobile it is way too small. I’ve messed around with sizes and padding, to no avail. I can’t go any larger on the logo size because it’s too big for the website version.

Anyone know the best way to optimize a logo for mobile versions only??

Much Appreciated!