JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html lang="en">
    <head>
        <!-- Required meta tags -->
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

        <!-- Bootstrap CSS -->
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

        <title>Downloader</title>
    </head>
    <body>

        <div class="conainer">
            <div class="row mx-0">
                <div class="col-2">
                    <div class="row bg-primary">
                        <div class="col">
                            <p>Sites-Banner</p>
                        </div>
                    </div>
                    <div class="row bg-secondary">
                        <div class="col">
                            <p>Sites-Search</p>
                        </div>
                    </div>
                </div>
                <div class="col-8 bg-danger">
                    <div class="row">
                        <div class="col">
                            <p>User-Login</p>
                        </div>
                    </div>
                </div>
                <div class="col-2">
                    <div class="row  bg-info">
                        <div class="col">
                            <p>Download-Banner</p>
                        </div>
                    </div>
                    <div class="row bg-light">
                        <div class="col">
                            <p>Download-Summary</p>
                        </div>
                    </div>
                </div>
            </div>
            <div class="row mx-0">
                <div class="col-2 bg-success">
                    <div class="row">
                        <div class="col">
                            <p>Sites-List</p>
                       ...