JSFiddle - React, Tailwind, and code Playground

HTML

<div class="mainmenu">
	<ul>
    	<li class="company"><a href="about.html">Home<!--[if lt IE 9]><b class="mtl"></b><b class="mbl"></b><![endif]--></a></li> 
    	<li><a href="production.html">Portfolio</a></li> 
    	<li><a href="news.html">Services</a></li> 
    	<li><a href="blog.html">Prices</a></li>
    	<li><a href="contacts.html">Jobs</a></li>
    	<li><a href="contacts.html">CMS</a></li> 
    	<li><a href="feedback.html">Company</a></li> 
    	<li><a href="contacts.html">Blog</a></li> 
    	<li><a href="catalog.html">Contacts</a></li> 
    	<li class="top-cart"><a href="#"><span>Client</span><!--[if lt IE 9]><b class="mtr"></b><b class="mbr"></b><![endif]--></a></li>
	</ul>
</div>

CSS

.mainmenu {
        position:absolute;
        top:88px;
        left:20px;
    }
	.mainmenu-fullwidth {
        right: 20px;
        background: #f9e312;
        background: url(data:image/svg+xml;base64,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);
        background: -moz-linear-gradient(top,  #f9e312 0%, #ffb612 100%);
        background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#f9e312), color-stop(100%,#ffb612));
        background: -webkit-linear-gradient(top,  #f9e312 0%,#ffb612 100%);
        background: -o-linear-gradient(top,  #f9e312 0%,#ffb612 100%);
        background: -ms-linear-gradient(top,  #f9e312 0%,#ffb612 100%);
        background: linear-gradient(top,  #f9e312 0%,#ffb612 100%);
        filter: 'none';
        border-radius: 10px;
    }
		.mainmenu ul {
			list-style:none;
			margin:0;
			padding:0;
			}
			.mainmenu li {
				float:left;
				font-size:16px;
                font-family: 'PFBeauSansProRegular';
                background: #f9e312;
                background:...