» First and foremost, we will create sample HTML structure and assume that the `selector` class exists.
<div class="selector">
<div>
<div>
<div>
<div class="e-n-tab-title" aria-selected="true">Tab 1</div>
<div class="e-n-tab-title" aria-selected="false">Tab 2</div>
<div class="e-n-tab-title" aria-selected="false">Tab 3</div>
</div>
</div>
</div>
</div>
» Use combination of CSS selector and an attribute selector.
selector > div > div > div > .e-n-tab-title[aria-selected="true"] {
background: red;
}