JSFiddle - React, Tailwind, and code Playground

HTML

<p>Hover over the DIV below:</p>
<a href="#"><div style="width:100px;height:100px"></div></a>

<ul id="nav"> 
                    <li><!--<a href="#" onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('btn_message','','images/btn_message2-roll.png',1)"><img src="images/btn_message2.png" width="104" height="33" border="0" id="btn_message" /></a>--><a href="#"><div style="width:475px; height:100px;"></div></a>
        <ul>
            <li><a href="#"><img src="images/img_home_quote6.png"/></a></li> 
        </ul>
    </li>
</ul>

CSS

a:hover div { border: 1px solid green; }

#nav{
	list-style:none;
	font-weight:bold;
	float: left;
	width: 481px;
	left: 4px;
	top: 4px;
	position: relative;
	padding: 0 0 0 0;
}
#nav li{
    float:left;
    position:relative;
	z-index:99999;
}

#nav a{
    display:block;
    padding:0px;
    text-decoration:none;
}
#nav a:hover{
	border:#00C;
}

#nav ul{ 
    list-style:none;
    position:absolute;
	display:none;
	 
}

#nav ul li{
    padding-top:0px; 
    float:none;
	top: -4px;
}

#nav ul a{
    white-space:nowrap; 
}

#nav li:hover ul{ 
top:-348px;
left:-70px;
	display:block;
}

#nav li:hover a{
	border:#00C;
}

#nav li:hover ul a{ 
    text-decoration:none;
	border:#00C;
}

#nav li:hover {
	border: 3px solid #2185C7;
	-moz-box-shadow: 0 0 5px 5px rgba(33,133,199,0.5);
	-webkit-box-shadow: 0 0 5px 5px rgba(33,133,199,0.5);
	box-shadow: 0 0 5px 5px rgba(33,133,199,0.5);
}

#nav li ul li:hover {
	border: none !important;
	box-shadow: none !important;
}