JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">

<div class="navbar navbar-inverse navbar-fixed-top">
  <div class="navbar-inner">
    <div class="container">
      <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </a>
      <a class="brand" href="#">Project name</a>
      <div class="nav-collapse collapse">
        <ul class="nav">
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#about">About</a></li>
          <li><a href="#contact">Contact</a></li>
        </ul>
      </div><!--/.nav-collapse -->
    </div>
  </div>
</div>

<div id="app-container" class="container-fluid" style="background-color: red;">
    <div id="menu-push"></div>
    <div id="app" class="row-fluid" style="background-color: blue;">
        <div id="menu" class="span2" style="background-color: green;">
            Menu
        </div>
        <div id="content" class="span10" style="background-color: purple;">
            Content                    
        </div>
    </div>
</div>

CSS

html, body {
    height: 100%;
}

#menu-push {
    height: 40px;
}

#app-container {
    min-height: 100%;
}

#app {
    height: 100%;
}