JSFiddle - React, Tailwind, and code Playground

HTML

<div class="c1">
    <div class="c2">
        <div class="c3">
            <input>
            <textarea></textarea>
        </div>
            
        <input>
        <textarea></textarea>
    </div>
</div>


<div class="c3">
    <input>
    <textarea></textarea>
</div>

CSS

div.c1 .c2 .c3 input,.c3 textarea{
    border: 1px solid #f00;
}