Change Slideshow Height on Homepage

Site URL: http://www.scope-d.com

Does anyone know how I can change the banner height on my homepage slideshow banner? Wanting to change the slideshow banner height on the homepage (top banner) specifically. 

Any help would be amazing, thank you! 
My website is www.scope-d.com

Hi. Change on desktop or mobile. If desktop, you can edit Gallery section > change height.

If mobile, add this to Design > Custom CSS

/* slide height on mobile */
@media screen and (max-width:767px) {
body.homepage .gallery-fullscreen-slideshow {
    height: 30vh !important;
}
}