JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
    <!-- Begin Header -->
    <div class="navbar 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">
            <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>

    <!-- End Header -->

    <!-- Begin Side Nav -->
    <div class="sideNav">
        <h5>Filters</h5>
    </div>
    <!-- End Side Nav -->

    <!-- Begin Main Content -->
    <div class="content">

<h2>Test page</h2>

<table>
<tr>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
    <td>Test Column</td>
  ...

CSS

.navbar-fixed-top
{
 height:40px;   
}
.content
{
    overflow: hidden;
    position: absolute;
    -moz-border-radius: 20px;
    -webkit-border-radius: 20px;
    -khtml-border-radius: 20px;
    border-radius: 20px;
    top: 40px; 
    bottom: 0px;
    left: 100px;
    right: 0px;
    padding: 0px 10px;
    overflow: auto;
}
.sideNav
{
    padding: 10px 0;
    position: fixed;
    left: 0px;
    top: 40px; /* same as .content top*/
    bottom: 0px;
    width: 100px;
    background-color: #f1f1f1;
    border-right: 1px solid #bbc0c4; /*z-index: 1020;  10 less than .navbar-fixed to prevent any overlap */
    text-align:center;
    font-size:11px;
    font-weight:bold;
}