inymusicworld on "problem hueman mobile"

I have a problem with the header in the theme human. I changed the header with the code: .site-title { float: none; padding: 0; }
#header .pad { padding: 0; }
#header { padding-bottom: 60px; }
but on the mobile version the header looks small. Please help.
Website: digimedia.juniorwebaward.ch