JSFiddle - React, Tailwind, and code Playground

HTML

<div id="form">

    <form method = "post" action = "test.htm" >
    UserName: <input type="text" name = "username" />   
    </form>
</div>

CSS

div#form form {
    background: none repeat scroll 0 0 #808080;
    display: block;
    height: 100px;
    line-height: 100px;
    margin: 0 auto;
    text-align: center;
    vertical-align: middle;
    width: 100%;
}