new tag

src/components/ProductList/ProductList.jsx

               }}
             />
 
-            {(selected) && <Button sx={{ position: "absolute", top: 20, left: 20, boxShadow: 0 }} variant="contained">
+            {(selected) && <Button
+              sx={{
+                position: "absolute",
+                top: {
+                  xs: 0,
+                  sm: 0,
+                  md: 20
+                },
+                left: {
+                  xs: 0,
+                  sm: 0,
+                  md: 20
+                },
+                boxShadow: 0,
+                fontSize: 10
+              }} 
+              variant="contained">
               NEW
             </Button>}