JSFiddle - React, Tailwind, and code Playground

HTML

<html>

  <head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="style.css" />
  </head>

  <body>
  

  
    <label for="show-menu" class="show-menu">Show Menu</label>
    <input type="checkbox" id="show-menu" role="button" />
    <ul id="menu">
      <li><a href="#">Home</a></li>
      <li>
        <a href="#">About ￬</a>
        <ul class="hidden">
          <li><a href="#">Who We Are</a></li>
          <li><a href="#">What We Do</a></li>
        </ul>
      </li>
      <li>
        <a href="#">Portfolio ￬</a>
        <ul class="hidden">
          <li><a href="#">Photography</a></li>
          <li><a href="#">Web & User Interface Design</a></li>
          <li><a href="#">Illustration</a></li>
        </ul>
      </li>
      <li><a href="#">News</a></li>
      <li><a href="#">Contact</a></li>
    </ul>
    

   
  </body>

</html>

CSS

body {
  margin: 0;
  padding: 0;
}

/*Strip the ul of padding and list styling*/



ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  position: absolute;
}

#menu {
  width:705px;
  margin:0 auto;
  display:block;
  position:static;
}

/*Create a horizontal list with spacing*/

li {
  display: inline-block;
  float: left;
  margin-right: 1px;
}

/*Style for menu links*/

li a {
  display: block;
  min-width: 140px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #fff;
  background: #2f3036;
  text-decoration: none;
}

/*Hover state for top level links*/

li:hover a {
  background: #19c589;
}

/*Style for dropdown links*/

li:hover ul a {
  background: #f3f3f3;
  color: #2f3036;
  height: 40px;
  line-height: 40px;
}

/*Hover state for dropdown links*/

li:hover ul a:hover {
  background: #19c589;
  color: #fff;
}

/*Hide dropdown links until they are needed*/

li ul {
  display: none;
}

/*Make dropdown links vertical*/

li ul li {
  display: block;
  float: none;
}

/*Prevent text wrapping*/

li ul li a {
  width: auto;
  min-width: 100px;
  padding: 0 20px;
}

/*Display the dropdown on hover*/

ul li a:hover+.hidden,
.hidden:hover {
  display: block;
}

/*Style 'show menu' label button and hide it by default*/

.show-menu {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-decoration: none;
  color: #fff;
  background: #19c589;
  text-align: center;
  padding: 10px 0;
  display: none;
}

/*Hide checkbox*/

input[type=checkbox] {
  display: none;
}

/*Show menu when invisible checkbox is checked*/

input[type=checkbox]:checked~#menu {
  display: block;
}

/*Responsive Styles*/

@media screen and (max-width: 760px) {
  /*Make dropdown links appear inline*/
  ul {
    position: static;
    display: none;
    max-width:100%;
  }
  /*Create vertical spacing*/
  li {
    margin-bottom: 1px;
  }
  /*Make all menu links full width*/
  ul li,
  li a {
   ...