Sidebar menu position

How to change sidebar menu position on mobile view?
On destktop menu displays on sidebar, and it is ok but on mobile I'd like to have it above articles in stead of under them. Is it possible?
https://www.equestrian.baborowko.pl/eng/index.php/competitions/skoki-przez-przeszkody

You can try this custom CSS:

@media (max-width: 576px) {
.t3-mainbody .t3-sidebar {
    position: absolute;
}

.t3-mainbody {
    position: relative;
}
}

Works perfect, thanks a lot!