JSFiddle - React, Tailwind, and code Playground

HTML

<nav class="dws-menu">
  <input type="checkbox" name="toggle" id="menu" class="toggleMenu">
  <label for="menu" class="toggleMenu"><i class="fa fa-bars"></i>Меню</label>
    
  <ul id="horizontal-multilevel-menu">
      <li>
            	<input type="checkbox" name="toggle" class="toggleSubmenu" id="sub_m1">
            	<a href="#" ><i class="fa"></i>Первый пункт</a>   
                <label for="sub_m1" class="toggleSubmenu"><i class="fa"></i></label>
                
        <ul class="sub_menu">
                	<li><a href="#" >Первый подпункт</a>
          <li><a href="#" >Второй подпункт</a>
        </ul>
            </li>
      <li><a href="#" >Второй пункт</a></li>
            <li><a href="#" >Третий пункт</a></li>
            <li><a href="#" >Четвртый пункт</a></li>
  </ul>
<nav>

CSS

.dws-menu *{
 margin: 0;
 padding: 0;
}
.dws-menu ul,
.dws-menu ol{
 list-style: none;
}
.dws-menu > ul{
 display: flex;
 justify-content: center;
}
.dws-menu > ul li{
 position: relative;
 border-right: 1px solid #c7c8ca;
}
.dws-menu > ul li:first-child{
 border-left: 1px solid #b2b3b5;
}
.dws-menu > ul li:last-child{
 border-right: 1px solid #babbbd;
}
.dws-menu > ul li > a i.fa{
 position: absolute;
 top: 15px;
 left: 12px;
 font-size: 18px;
}
.dws-menu > ul li a{
 display: block;
 /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#c9c9c9+0,f6f6f6+2,c4c5c7+98,757577+100;Custom+3 */
 background: rgb(201,201,201); /* Old browsers */
 background: -moz-linear-gradient(top,  rgba(201,201,201,1) 0%, rgba(246,246,246,1) 2%, rgba(196,197,199,1) 98%, rgba(117,117,119,1) 100%); /* FF3.6-15 */
 background: -webkit-linear-gradient(top,  rgba(201,201,201,1) 0%,rgba(246,246,246,1) 2%,rgba(196,197,199,1) 98%,rgba(117,117,119,1) 100%); /* Chrome10-25,Safari5.1-6 */
 background: linear-gradient(to bottom,  rgba(201,201,201,1) 0%,rgba(246,246,246,1) 2%,rgba(196,197,199,1) 98%,rgba(117,117,119,1) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
 filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#c9c9c9', endColorstr='#757577',GradientType=0 ); /* IE6-9 */

 padding: 15px 30px 15px 40px;
 font-size: 14px;
 color: #454547;
 text-decoration: none;
 text-transform:uppercase;
 transition: all 0.3s ease;
}
.dws-menu li a:hover{
 /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#e0e1e5+0,454547+2,454547+98,e0e1e5+100 */
 background: rgb(224,225,229); /* Old browsers */
 background: -moz-linear-gradient(top,  rgba(224,225,229,1) 0%, rgba(69,69,71,1) 2%, rgba(69,69,71,1) 98%, rgba(224,225,229,1) 100%); /* FF3.6-15 */
 background: -webkit-linear-gradient(top,  rgba(224,225,229,1) 0%,rgba(69,69,71,1) 2%,rgba(69,69,71,1) 98%,rgba(224,225,229,1) 100%); /* Chrome10-25,Safari5.1-6 */
...