body {
	max-width: 800px;
	margin: auto;
	padding: 1em;
	line-height: 1.6em;
	color: #454545;
}

header {
	border-bottom: 2px double;
	border-bottom-color: #ddd;
}

footer {
	border-top: 2px double;
	border-top-color: #ddd;
	font-size: 0.7em;
	padding:0.5em;
	line-height:1.2em;
}

main {
	text-align: justify;
}

a {
	color: #0077aa;
	text-decoration: none;
}

h1 {
	margin-bottom: 0.2em;
	text-align: center;
}
h1+h3 {
	margin-top: 0.2em;
	margin-bottom: 60px;
	font-style: italic;
	text-align: center;
}

h1,h2,h3 {
	line-height: 1.2em;
}


@media all and (min-width: 640px) {
nav {
	display: flex;
}

#menu, #lang {
	display: flex;
}
#lang {
	justify-content: flex-end;
}
#menu li, #lang li {
	list-style-type: none;
}
#menu a, #lang a {
	background: #eee;
	padding: 5px;
	border-radius: 5px;
	margin: 0 0.2em;
}
#hidden, #lang {
	flex: 1;
}

#menu-icon {
	display: none;
}
}


@media all and (max-width: 640px) {

nav {
	display: flex;
}

nav ul {
	display: flex;
	flex-direction: column;
	max-height:0;
	overflow: hidden;
	transition: max-height 0.25s ease-in;
}

nav:hover ul{
	max-height:150px;
	transition: max-height 0.5s ease-out;
}

nav li {
	list-style-type: none;
	background: #eee;
	margin: 0.2em 0em;
}
nav a {
	padding: 0.4em;
}

#menu-icon {
	font-size: 24px;
}

}