JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
<li></li>
<li></li>
<li></li>
</ul>

CSS

ul {
    width: 304px;
    height: 60px;
    background: grey;
    
    -webkit-border-bottom-left-radius: 5px 5px;
    -webkit-border-bottom-right-radius: 5px 5px;
    -webkit-border-top-left-radius: 5px 5px;
    -webkit-border-top-right-radius: 5px 5px;
    -webkit-border-radius: 5px 5px 5px 5px;
    
    background: -moz-linear-gradient(top,  rgba(89,89,89,1) 0%, rgba(102,102,102,0.89) 44%, rgba(44,44,44,0.86) 57%, rgba(44,44,44,0.75) 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(89,89,89,1)), color-stop(44%,rgba(102,102,102,0.89)), color-stop(57%,rgba(44,44,44,0.86)), color-stop(100%,rgba(44,44,44,0.75))); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top,  rgba(89,89,89,1) 0%,rgba(102,102,102,0.89) 44%,rgba(44,44,44,0.86) 57%,rgba(44,44,44,0.75) 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top,  rgba(89,89,89,1) 0%,rgba(102,102,102,0.89) 44%,rgba(44,44,44,0.86) 57%,rgba(44,44,44,0.75) 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top,  rgba(89,89,89,1) 0%,rgba(102,102,102,0.89) 44%,rgba(44,44,44,0.86) 57%,rgba(44,44,44,0.75) 100%); /* IE10+ */
    background: linear-gradient(to bottom,  rgba(89,89,89,1) 0%,rgba(102,102,102,0.89) 44%,rgba(44,44,44,0.86) 57%,rgba(44,44,44,0.75) 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#595959', endColorstr='#bf2c2c2c',GradientType=0 ); /* IE6-9 */
}
li {
    width: 100px;
    height: 60px;
    border-left: 1px solid rgba(0, 0, 0, 0.2);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    float: left;
}
li:first-child {
    border-left: none;
}
li:last-child {
    border-right: none;
}