CSS to Remove Blank Space Above and Below Site Title on Mobile?

Site URL: http://amyroperlyons.com

I want to remove the large blank spaces above and below the my Site Title (AMY ROPER LYONS) on mobile (see image attached). There are no big spaces on desktop or tablet view. I tried all the code I could find on this forum that seemed to apply to this situation but nothing had any effect. Web address is http://amyroperlyons.com if you want to look.

Add to Home > Design > Custom CSS

@media screen and (max-width:767px) {
header#header {
    padding-top: 0 !important;
    margin-bottom: 0;
}
h1.logo {
    font-size: 40px !important;
}
}

Thanks very much, Tuan! The code you suggested:

@media screen and (max-width:767px) {
header#header {
    padding-top: 0 !important;
    margin-bottom: 0;
}
h1.logo {
    font-size: 40px !important;
}
}

worked perfectly and the body images and text now appear much closer to the Site Title on mobile. Thanks!