hi harrij,
Thanks for sharing your query, let me share some CSS hacks for quick solutions.
CSS:
@media only screen and (max-width: 479px) {
.shiftnav-shiftnav-main {width: 60%;}
#shiftnav-toggle-main .shiftnav-toggle-burger{padding: 16px 10px;}
.shiftnav-open.shiftnav-open-left #shiftnav-toggle-main {
transform: translateX(260px); }
}
I hope this solves your problem.
Best Regards,
Hemant Shewakramani