
  width: 192px; height: 768px;
}
#inner > div { width: 192px; height: 384px; }
#top { background-color: lime; }
#bottom { background-color: aqua; }
  </style>
</head>
<body>
<div id="outer"><div id="inner"><div id="top"></div><div id="bottom"></div></div></div>
</body>
</html>
