Icono de hamburguesa animado en CSS t6r38

<!doctype html>
<html lang="es">
<head>
<meta charset="utf-8">
<title>Icono de hamburguesa animado en CSS</title>
</head>
<body>
<style>
body { background-color: black; height: 100%; }
h3 { color: white; }
#nav-toggle { position: absolute; left: 50%; top: 50%; }

#nav-toggle { cursor: pointer; padding: 10px 35px 16px 0px; }
#nav-toggle span, #nav-toggle span:before, #nav-toggle span:after {
  cursor: pointer;
  border-radius: 1px;
  height: 5px;
  width: 35px;
  background: white;
  position: absolute;
  display: block;
  content: '';
}
#nav-toggle span:before {
  top: -10px; 
}
#nav-toggle span:after {
  bottom: -10px;
}

#nav-toggle span, #nav-toggle span:before, #nav-toggle span:after {
  transition: all 500ms ease-in-out;
}
#nav-toggle.active span {
  background-color: transparent;
}
#nav-toggle.active span:before, #nav-toggle.active span:after {
  top: 0;
}
#nav-toggle.active span:before {
  transform: rotate(45deg);
}
#nav-toggle.active span:after {
  transform: rotate(-45deg);
}
</style>
 <h1 align="center" style="color:black; font-family: Monaco, 'Courier New', monospace; size:12px; text-transform:capitalize; text-decoration: none;">Web Editor - Tutoriales En Linea</h1>

<h3>Icono de hamburguesa animado en CSS (haga clic en hamburguesa)</h3>

<a id="nav-toggle" href="#"><span></span></a>
<script type="text/javascript">
document.querySelector( "#nav-toggle" )
  .addEventListener( "click", function() {
    this.classList.toggle( "active" );
  });
</script>
</body>
</html>