Update style.css for JavaScript Quiz App (#152)

Made the app responsive so that it doesnt look messy in mobile or tablet devices or in smaller screens

Author: Svrajj

Javascript Quiz App/style.css

@@ -49,4 +49,28 @@ body{
     background-color: blue;
 
     color: brown;
-}
+}
+
+@media all and (max-width: 700px) {
+
+    #quesBox {
+        font-size: 16px;
+        font-weight: bold;
+    }
+    .row > label {
+        font-size: 12px;
+    }
+
+    #box {
+        width: 70%;
+        height : 350px;
+    }
+}
+
+@media all and (max-width: 350px) {
+
+    #box {
+        width: 80%;
+        height : 400px;
+    }
+}