Edit mobile view??

Site URL: https://www.aerofinadesign.com/

Trying to edit my mobile view... not sure what went wrong? Im hoping to remove my tagline just on mobile since it looks out of space and my drop down menu button is off screen? not sure why my screen is displaying too wide... is it because of the tagline??

Please help

site: https://www.aerofinadesign.com/

password: Aerofina2020

Hi. Add this to Design > Custom CSS

/* remove site title mobile */
@media screen and (max-width:767px) {
.header-title:after {
	display: none;
}
}