Mind the syntax to be sure it doesn’t mess up the other CSS. 🙂
The one you’ve shared seems to be missing a } to close the @media rule.
@media (max-width:768px){
/* Mobile header bar */
nav#mobile-header {
background-color: white;
}
nav#mobile-header .menu-bar-items span.gp-icon svg {
fill:black;
}
}
But yeah, aside from the syntax issue, it looks good. 😀