Fix body margin and padding for consistent layout in main.css

Author: StoppedwummSites

ui/chrome/css/main.css

@@ -2,6 +2,8 @@ body {
     background-color: #ffffff;
     font-family: Arial, sans-serif;
     color: #333;
+    margin: 0;
+    padding: 20px;
 }
 
 #terminal {