XF 2.0 How to responsive sidebar xenforo 2

[Thangvip9x]

I want to using iPad, sidebar will display reponsive
Thank you very much
This is code for xenforo 1.5

<xen:if is="@enableResponsive">
@media (max-width:@maxResponsiveWideWidth)
{
    .Responsive .sidebar
    {
        width: 100%;
    }
}
</xen:if>

I need code for 2.x
Thank you very much