@media (max-width:320px)  { 
	/* smartphones, iPhone, portrait 480x320 phones */ 
	.sticky-top {
		position: relative;
		top: 0;
	}
  
	.product-shop{
		margin-top: 225px;
	}
	
	.r-mb18{
		margin-bottom: 18px;
	}
	
	.premium-img img{
		height: auto;
		width: auto;
	}
}
@media (max-width:481px)  {
		/* portrait e-readers (Nook/Kindle), smaller tablets @ 600 or @ 640 wide. */ 
	.sticky-top {
		position: relative;
		top: 0;
	}
  
	.product-shop{
		margin-top: 225px;
	}
	
	.r-mb18{
		margin-bottom: 18px;
	}
	
	.premium-img img{
		height: auto;
		width: auto;
	}
	
}
@media (min-width:641px)  { 
	/* portrait tablets, portrait iPad, landscape e-readers, landscape 800x480 or 854x480 phones */ 
}
@media (min-width:961px)  {
		/* tablet, landscape iPad, lo-res laptops ands desktops */ 
}
@media (min-width:1025px) { 
	/* big landscape tablets, laptops, and desktops */ 
}
@media (min-width:1281px) {
		/* hi-res laptops and desktops */ 
}

@media only screen and (max-width: 600px) {
  
}