JSFiddle - React, Tailwind, and code Playground

CSS

#menu-bar {
  width: 95%;
  margin: 0px 0px 0px 0px;
  padding: 6px 6px 4px 6px;
  height: 34px;
  line-height: 100%;
  border-radius: 24px;
  -webkit-border-radius: 24px;
  -moz-border-radius: 24px;
  box-shadow: 2px 2px 3px #666666;
  -webkit-box-shadow: 2px 2px 3px #666666;
  -moz-box-shadow: 2px 2px 3px #666666;
  background: #8B8B8B;
  background: linear-gradient(top,  #A9A9A9,  #7A7A7A);
  background: -ms-linear-gradient(top,  #A9A9A9,  #7A7A7A);
  background: -webkit-gradient(linear, left top, left bottom, from(#A9A9A9), to(#7A7A7A));
  background: -moz-linear-gradient(top,  #A9A9A9,  #7A7A7A);
  border: solid 1px #6D6D6D;
  position:relative;
  z-index:999;
}
#menu-bar li {
  margin: 0px 0px 6px 0px;
  padding: 0px 6px 0px 6px;
  float: left;
  position: relative;
  list-style: none;
}
#menu-bar a {
  font-weight: bold;
  font-family: arial;
  font-style: normal;
  font-size: 12px;
  color: #E7E5E5;
  text-decoration: none;
  display: block;
  padding: 6px 20px 6px 20px;
  margin: 0;
  margin-bottom: 6px;
  border-radius: 10px;
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  text-shadow: 2px 2px 3px #000000;
}
#menu-bar li ul li a {
  margin: 0;
}
#menu-bar .active a, #menu-bar li:hover > a {
  background: #0399D4;
  background: linear-gradient(top,  #EBEBEB,  #A1A1A1);
  background: -ms-linear-gradient(top,  #EBEBEB,  #A1A1A1);
  background: -webkit-gradient(linear, left top, left bottom, from(#EBEBEB), to(#A1A1A1));
  background: -moz-linear-gradient(top,  #EBEBEB,  #A1A1A1);
  color: #444444;
  -webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
  -moz-box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
  box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
  text-shadow: 2px 2px 3px #FFFFFF;
}
#menu-bar ul li:hover a, #menu-bar li:hover li a {
  background: none;
  border: none;
  color: #666;
  -box-shadow: none;
  -webkit-box-shadow: none;
  -moz-box-shadow: none;
}
#menu-bar ul a:hover {
  background: #0399D4 !important;
  background: linear-gradient(top, ...