JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="cs">
    <head>
        <title>xGhost.cz | Československý Gamehosting.</title>
        <!-- meta data -->
        <meta name="author" content="Jan Dvořák">
        <meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- styles -->
        <link rel="stylesheet" href="css/style.css">
		<!-- BOOTSTRAP START -->
		<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-F3w7mX95PdgyTmZZMECAngseQB83DfGTowi0iMjiWaeVhAn4FJkqJByhZMI3AhiU" crossorigin="anonymous">
		<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/js/bootstrap.bundle.min.js" integrity="sha384-/bQdsTh/da6pkI1MST/rWKFNjaCP5gBSY4sEBT38Q/9RBh9AH40zEOg7Hlq2THRZ" crossorigin="anonymous"></script>
		<!-- BOOTSTRAP END -->		
    </head>
    <body>
		<div class="container-md">
			<div class="row">
				<div class="row">
					<div class="col-sm-12 col-md-1 text-sm-center">
						<img src="img/xGhost.svg" alt="" style="width: 300px; height: auto;"/>
					</div>
				</div>
				<nav class="navbar navbar-expand-md navbar-dark bg-dark mt-2">
					<a class="navbar-brand" href="#" style="font-style: italic;">xGhost.cz</a>
					<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
						<span class="navbar-toggler-icon"></span>
					</button>

					<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
						<ul class="navbar-nav ms-auto">
							<li class="nav-item"><a class="nav-link active" aria-current="page" href="#">Úvod</a></li>
							<li class="nav-item"><a class="nav-link" href="#">Ceník</a></li>
							<li class="nav-item"><a class="nav-link" href="#">Objednávka</a></li>
							<li class="nav-item"><a class="nav-link" href="#">Příručka</a></li>
							<li class="nav-item"><a class="nav-link"...

CSS

body {
	background: url(../img/bg.jpg) no-repeat center center fixed; 
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
}

.navbar {
	text-align: center;
}

.nav-link:hover {
	color: rgba(39, 174, 96, 1.0) !important;
}

.box {
	width: 100%;
	height: auto;
}
.box-heading {
	background: #212529 !important;
	color: #fff;
	text-align: center;
	padding: 7px;
	width: 100%;
}