JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container-fluid">

    <div class="row-fluid">
        <div class="span12 header">Hello</div>
    </div>

    <div class="row-fluid">
        <div class="span2 left-col">Left Left Left Left Left Left Left</div>
        <div class="span10 right-col">Right Right Right Right Right Right Right </div>
    </div>

</div>
   <div class="clearfix"></div>

CSS

.header{
    background-color:#f00;
}
.left-col{
    background-color:#0f0;
    float:left;
    width:200px;
    height:400px;
}
.right-col{
    background-color:#00f;
    height:400px;
    padding-left:200px;
}