JSFiddle - React, Tailwind, and code Playground

HTML

<div id="navbar">
  <ul>
    <li class="item-120 parent"> <a href="/">Academics</a>
      <ul class="nav-child">
        <li class="item-204 parent"><a href="/">IB Programmes</a></li>
        <li class="item-205 parent"> <a href="/">VCE</a>
          <ul class="nav-child">
            <li class="item-215"><a href="/">VCE Overview</a></li>
            <li class="item-216"><a href="/">Outcomes and SACs</a></li>
            <li class="item-217"><a href="/">Assessment and Scoring</a></li>
            <li class="item-218"><a href="/">Subjects We Offer</a></li>
            <li class="item-219"><a href="/">Who is the VCE for?</a></li>
          </ul>
        </li>
        <li class="item-205 parent"><a href="/">Student Wellbeing</a></li>
        <li class="item-207 parent"><a href="/">Resource Library</a></li>
      </ul>
    </li>
  </ul>
</div>

CSS

#navbar ul {
    float: none;
    margin: 0;
    padding: 0
}
#navbar ul li {
    margin: 0;
    padding: 0;
    display: inline-block
}
#navbar ul li > a,
#navbar ul li > span {
    color: #004665;
    padding: 10px 0 10px 35px;
    margin: 0;
    display: block;
    font-family: 'roboto-condensed', sans-serif;
    font-weight: 700;
    font-size: 24px;
    text-transform: uppercase;
    line-height: 72px
}
#navbar ul li.active > a,
#navbar ul li > a:hover,
#navbar ul li > a:focus {
    color: #6fbfe6;
    background: none
}
#navbar ul li > ul {
    position: absolute;
    background: #f0f;
    padding: 30px 0 20px;
    border-top: solid 2px #b1b1b1;
    display: none
}
#navbar ul li > ul li {
    display: block;
    margin: 0;
    padding: 0;
    white-space: nowrap
}
#navbar ul li > ul li > a {
    font-size: 20px;
    line-height: normal;
    margin: 0;
    padding: 0 30px 10px;
    white-space: nowrap
}
#navbar ul li > ul li > ul {
    left: 100%;
    z-index: 1000;
    top: -32px;
    width: 100%;
    background:#f9f
}
#navbar ul li > ul li > ul li.parent:hover > ul {
    display: block
}
#navbar ul li.parent:hover > ul{display:block}