Customize the website on tablet version

Site URL: https://www.sykee.com.au

Hi Squarespace Community,
I am in a desperate help of customizing Squarespace Tablet Version.
Please see the site here:
www.sykee.com.au
I am unable to find the actual media query to customize the site on tablet version.
I have tried many media queries but all are fail.
If any one know this, then please help me.
I would be highly thankful!

Try this query

@media screen and (min-width:641px) and (max-width:900px) {

Enter your CSS here

}