JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="tabs">
    <li class="tabs-page">
        <input type='radio' name='tab' id='tab-search' checked/>
        <label for='tab-search'>Search</label>
        <div class="content">
            <h2>The search page</h2>
            <p>Nam voluptates voluptatum aut etiam imperdiet. Dolores accusamus. Excepturi illum molestie imperdiet accusamus praesentium lacus temporibus diamlorem enim penatibus commodo.</p>

<p>Dis accusantium illum mauris cupidatat vehicula aspernatur cursus inceptos eiusmod commodi voluptatibus dictum! Exercitation egestas quas, debitis mollis facilisis commodi.</p>
        </div>
    </li>
    <li class="tabs-page">
        <input type='radio' name='tab' id='tab-post' />
        <label for='tab-post'>Post</label>
        <div class="content">
            <h2>The post page</h2>
            <p>Nam voluptates voluptatum aut etiam imperdiet. Dolores accusamus. Excepturi illum molestie imperdiet accusamus praesentium lacus temporibus diamlorem enim penatibus commodo.</p>

<p>Dis accusantium illum mauris cupidatat vehicula aspernatur cursus inceptos eiusmod commodi voluptatibus dictum! Exercitation egestas quas, debitis mollis facilisis commodi.</p>
        </div>
    </li>
</ul>

CSS

/* this is where the magic happens */
input[name='tab'] {
    display: none;
}
input[name='tab'] ~ .content {
    display: none;
}
input[name='tab']:checked ~ .content {
    display: block;
}
/* the rest is just fancification, noth required */
input[name='tab']:checked ~ label {
    background: #fff;
    width: 90px;
    border-right: transparent;
}
.content {
    position: absolute;
    left: 100px;
    right: 0;
    top: 0;
    padding: 5px 10px;
    border: 1px solid #ccc;
    z-index: -1;
}
.tabs-page > label {
    padding: 5px;
    margin-bottom: 3px;
    border: 1px solid #ccc;
    background: #eee;
    display: block;
    width: 89px;
}
h2 {
    font-size: 20px;
    font-weight: bold;
}
.tabs {
    position: relative;
    margin: 10px;
}