style background responsive

src/constants/globalStyle.ts

@@ -13,8 +13,15 @@ const GlobalStyle = createGlobalStyle`
 
     background-color: #000000;
     opacity: 1;
-    background-image: radial-gradient(#505050 0.75px, #000000 0.75px);
-    background-size: 15px 15px;
+    background-image: radial-gradient(#414141 0.5px, #000000 0.5px);
+    background-size: 10px 10px;
+
+    @media only screen and (min-width: 768px) {
+      background-color: #000000;
+      opacity: 1;
+      background-image: radial-gradient(#414141 0.5px, #000000 0.5px);
+      background-size: 15px 15px;
+    }
   }
   
   a {