JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="header">
        <span>
            <span>First</span>
        </span>
        <span>
            <span>Second</span>
        </span>
        <span class="active">
           <span>Thrid</span>
        </span>
    </div>
    <div class="body">
        <div class="Control1">
            Content!
        </div>
    </div>
</div>

CSS

.container
{
    height: 300px;
    border: black 1px solid;
}

.container > .header
{
    background: grey;
}
.container > .header > span
{
    display: inline-block;
    padding: 10px;
}
.container > .header > .active
{
    background: black;
    color: white;
}

.container > .body
{
    height: 100%;
    overflow: auto;
    background: lightgrey;
}