Update index.html

Author: ZORO2045

index.html

@@ -132,6 +132,12 @@
             background-color: #1e1e1e;
             border-radius: 5px;
         }
+        @media (max-width: 768px) {
+            #modalContent {
+                width: 90%;
+                margin: 10% auto;
+                padding: 15px;
+            }
     </style>
 </head>