Media queries not working for block cart

[Anger2211]

Hello everyone,

 

I have the default theme of Prestashop but I have made few modifications in the css. Because of those modifications, my website doesn't look good on mobile device, especially for the Block Cart as you can see here : http://quirktools.com/screenfly/#u=http%3A//kingsandqueenspets.com&w=320&h=480&a=33&s=1

(Shopping cart is completely on the right)

 

My website is www.kingsandqueenspets.com

 

So I would like to add Media Queries to Block Cart CSS, but it's not working. So if someone could tell me where the problem is in this code in blockcart.css :

@media (max-width: 520px) {
	#header .shopping_cart {
		float: right;
		position: relative;
		padding-top: 0px;
 	 	left: 0px; } }

Thank you everyone !