JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container clearfix">
			<nav class="nav">
				<ul class="toolbar">Menu
					 <li><a class="dashboard current"></a>Dashboard</li>
					 <li><a class="customers"></a>Customers</li>
					 <li><a class="tickets"></a>Tickets</li>
					 <li><a class="staff"></a>Staff</li>
					 <li><a class="help"></a>Help</li>
					 <!--<li><a class=""></a></li>					 
					 <li><a class=""></a></li>-->
					 <li><a class="weather"></a>Cloudy</li>
				</ul>
			</nav>
			
			<div class="searchform">
				<form class="frmSearch">
					<input name="searchTxt" type="text" id="searchTxt" value="" class="k-textbox" placeholder="Search for a customer" />
					<button type="button" class="searchBtn">Search</button>
					<button type="button" class="searchBtn">New</button>
				</form>				
			</div>
			<!--<hr />-->
			<div class="contentDiv">
				<div class="customerDesc">				
						<img src="../images/customer.png" class="custDescImg" />
						<h2 class="custTitle">ADD A CUSTOMER</h2>				
						<p class="addCustDesc">
							Use this page to add a new customer along with any prospective sales you believe will be possible in the near future.
						</p>
						<!--<hr/>-->
				</div>				
				<div class="customerType clearfix">
					<hr />
					<!--<h3 class="custTitle">Customer type</h2>-->
					<p class="custTypeLabel">Customer type</p>
					<ul class="custTypeList">
						 <li><a class="custTypeImg"></a>Groundspread</li>
						 <li><a class="custTypeImg"></a>Tipping</li>
						 <li><a class="custTypeImg"></a>Freight</li>
						 <li></li>					 
					</ul>				
				</div>
				
				<div class="custFormCont clearfix">
				<hr/>
				<form id="addCustForm" name="addCustForm" class="custForm">
					<div>
						<label for="drpTitle">Title</label>
						<select id="drpTitle"></select>
					</div>
					<div class="formcolumn">						
						<label for="txtFname">First name</label>
						<input type="text" id="txtFname" class="k-textbox" value="" />
						<label for="drpCrdtS">Credit...

CSS

/**
 * Eric Meyer's Reset CSS v2.0 (http://meyerweb.com/eric/tools/css/reset/)
 * http://cssreset.com
 */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
	display: block;
}
body, button, input, textarea, p, label {
font-family: "Proxima Nova Regular","Helvetica Neue",Calibri,"Droid Sans",Helvetica,Arial,sans-serif;
font-style: normal;
font-weight: 400;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

/* CLEAR-FIX 
.clearfix:after { 
    visibility: hidden; display: block; font-size: 0; 
    content: " "; clear: both; height: 0; 
}
*:first-child+html .clearfix { zoom: 1; } /* IE7 */

.clearfix:before,
.clearfix:after {
    content: "";
    display: table;
}

.clearfix:after {
    clear: both;
}

/* Gibson specific style classes */
.k-ff {
    overflow: inherit !important;
}
.container{
	height: auto;
}
.nav {
	position: relative;
	margin: 0 0;	
}
.nav ul {
	margin: 0;
	padding: 0;
	overflow: hidden;
	background-color: #5B9BD5;	
}
.nav li {
	margin: 0;
	padding: 0 0 2px 0;
	list-style: none;
	display: inline-block;
	float:left;
	cursor:pointer;
	width:12.5%;	
	/*opacity: 0.6;*/
	font-weight: bold;
	font-size: 0.8em;
	text-align:...