Menu não aparece html

Olá pessoal. Estou trabalhando na construção do menu de uma página. Coloquei um botão com uma imagem, de modo que o evento de aparecer e desaparecer do menu seja feito sobre a imagem. Mas ao tentar fazer isso, a imagem muda de cor, porém os links não aparecem!!! Não estou usando Javascript ou JQuery.

Home.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">
		<button class="btn_menu">
			<figure class="conf_logo">
				<img src=" imagens/menu.JPG"/>
			</figure>
		</button>
		<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>
	<section>
		<p>Aqui será o texto da página principal</p>
	
	</section>
</body>
</html>

Design.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;
}
	
.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 by default */
.mySlides {
  display: none;
}

/* Next & previous buttons */
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  background-color: rgba(0,0,0,0.1);
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  width: 100%;
  text-align: center;
}

.imgslide {
  width: 60%;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}
@media (max-width: 700px) {
  .numbertext {
    top: 15px;
  }
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

Tu não consegue jogar esse código num codepen ou jsfiddle pra gente ver melhor não?

Vai ficar melhor pra gente te ajudar. Vlw!

Aqui vai a Home, após passar pelo codepen:

Restauradora CESM

Nosso foco é a satisfação do cliente!!!

	<figure class="conf_logo">
		<img src=" imagens/logo.PNG"/>
	</figure>
</div>

<hr />

<div class="menu_nav">
	<button class="btn_menu">
		<figure class="conf_logo">
			<img src=" imagens/menu.JPG"/>
		</figure>
	</button>
	<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>
<section>
	<p>Aqui será o texto da página principal</p>

</section>

design.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;
}

.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 by default */
.mySlides {
display: none;
}

/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
background-color: rgba(0,0,0,0.1);
}

/* Position the “next button” to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
width: 100%;
text-align: center;
}

.imgslide {
width: 60%;
}

/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
@media (max-width: 700px) {
.numbertext {
top: 15px;
}
}

/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}

@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}

Coloquei no codepen, mas eu tenho de exportá-lo?

Cria lah e posta o link aqui

https://codepen.io/flavio-sales-moreira/pen/rNNVqqY?editors=1100

Fiz umas mudanças no código, veja: https://jsfiddle.net/fm69h38r/

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%;
}

.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 by default */
.mySlides {
  display: none;
}

/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  background-color: rgba(0, 0, 0, 0.1);
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  width: 100%;
  text-align: center;
}

.imgslide {
  width: 60%;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}
@media (max-width: 700px) {
  .numbertext {
    top: 15px;
  }
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

@keyframes fade {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}