JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="CSS/style.css">
<link rel="stylesheet" href="CSS/navbar.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<div id="navbar">
  <ul id="navbarList">
    <li id="homeButton"><a href="home.php">Home</a></li>
    <li id="blogButton"><a href="blog.php">Blog</a></li>
    <li id="downloadsButton"><a href="downloads.php">Downloads</a></li>
    <li id="managerButton"><a href="manager.php">Manager</a></li>
    <li id="accountButton"><a id='accountAButton'    href='manager.php'>Luke</a>
      <ul id='dropDownList'>
        <li><p class='accountDropDownElement'>Logout</p></li>
        <li><p class='accountDropDownElement'>Login</p></li>
      </ul>
    </li>
  </ul>
</div>

CSS

#navbar ul {
	list-style-type: none;
	width: 965px;
}

#navbar ul li ul {
  display: none;
	position: absolute;
  top: 66px;
  left: 0;
  padding: 0;
}

#navbar ul li ul li {
	display: block;
}


#navbar ul li {
  display: inline-block;
  padding: 0 10px;
  position: relative;
	border-radius: 25px;
}

#navbar ul li:hover > a {
  border: 1px rgb(204, 255, 102) solid;
	background-color: rgb(204, 255, 102);
	box-shadow: none;
}

#navbar ul li:hover ul {
	display: block;
}

#navbar ul li:hover ul li {
  display: block;
}

#navbar ul li a {
	border-radius: 25px;
	border: 1px rgb(57, 232, 38) solid;
	background-color: rgb(57, 232, 38);
	box-shadow: 0px 3px 3px rgba(0,0,0,0.5);
	color: white;
	display: block;
	float: left;
	font-family: "micross";
	font-size: 30px;
	padding: 15px;
	text-decoration: none;
}

#navbar ul li a:hover {
	border: 1px rgb(204, 255, 102) solid;
	background-color: rgb(204, 255, 102);
	box-shadow: none;
}
#accountButton:hover {
	cursor: pointer;
}

#accountDropDownImage {
    float: left;
}

.accountDropDownElement {
    width: 100px;
    background-color: rgb(57, 232, 38);
    color: white;
    font-size: 20px;
    margin: 0;
    padding-left: 20px; 
    padding-right: 20px;
    padding-top: 10px;
    padding-bottom: 10px;
}