JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE HTML>
<html lang="pt-br">

<head>
	<!-- tag's obrigatórias para uso de bootstrap-->
	<meta charset="UTF-8">
	<meta name="view_port" content="width-device-width", initial-scale="1", shrink-to-fit="no" >
	<title>Restauradora CESM</title>
	<link rel="stylesheet" href=" css/design.css"/>	
	<script type="text/javascript" src=" scripts/script_js.js"></script>
</head>

<body class="corpo_pages">
	<div class="cabecalho">
		<h3 style="text-align:center">Nosso foco é a satisfação do cliente!!!</h3>
		
		<figure class="conf_logo">
			<img src="imagens/logo.PNG"/>
		</figure>
	</div>
	
	<hr />
	
	<div class="menu_nav">
		<div class="btn_menu">
			<figure class="conf_logo">
				<img src=" imagens/menu.JPG"/>
			</figure>
      
			<div class="menu_pages">
				<figure class="conf_logo">
					<img src=" imagens/menu.JPG"/>
				</figure>
        
				<a href="Home.html">Home</a>
				<a href="Galeria.html">Galeria</a>
				<a href="Empresa.html">Quem Somos</a>
				<a href="Contato.html">Contato</a>
			</div>
		</div>
	</div>
	
	<br/>
	
	<section>
		<p>Aqui será o texto da página principal</p>
	</section>
</body>

</html>

CSS

* {
  margin: 0;
  padding: 0;
}
/* seletor-widget: configuração de tela para dispositivos (smartphones, tablets, etc.) */
.seletor-widget {
  box-sizing: content-box;
}

/* conf_logo: configurações para o logo da página */
.conf_logo img {
  max-width: 700px;
  max-height: 200px;
  border-radius: 550px;
  width: auto;
  height: auto;
}

/* .check: responsável pelo drop e down do menu*/
.check {
  display: none;
}

/* .icone: configuração para o ícone de menu */
.icone {
  margin-top: 2px;
  margin-right: 64px;
  max-height: 10px;
  max-width: 15px;
  width: auto;
  height: auto;
  float: right;
  border: 1px solid #c0c0c0;
}

body .cabecalho {
  background-color: #a6a6a6;
  font-family: arial, helvetica, sans-serif;
  font-size: 19px;
}

/* Fix IE. Hide from IE Mac \*/
* html ul li {
  float: left;
}
* html ul li a {
  height: 1%;
}
/* End */

.btn_menu {
  background-color: #cccccc;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  float: right;
}

.btn_menu:hover > .menu_pages {
  display:block;
}

.menu_nav {
  position: relative;
  display: inline-block;
  float: right;
}

.menu_pages {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1;
}

.menu_pages a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.menu_pages a:hover {
  background-color: #ddd;
}
.menu_nav:hover .menu_pages: {
  display: block;
}
.menu_nav:hover .btn_menu {
  background-color: #3e8e41;
}

.corpo_pages {
  text-indent: 20px;
  background-color: #d9ffb3;
  font-size: 19px;
  margin-left: 0.8cm;
  margin-right: 0.5cm;
}

/* Final page style
   !!Below this line, Gallery's code starts!!*/

/* Slideshow container */
.gallery-container {
  width: 90%;
  position: relative;
  margin: 0 5%;
  background: #333;
  padding: 2px;
}
@media (min-width: 400px) {
  .gallery-container {
    width: 700px;
    margin: auto;
  }
}

/* Hide the images...