CSS
body {
	font-family:  Verdana, Arial, sans-serif;
	background-color: #FBFAF7;
	margin: 1em;
	color: #537530;/*Dark moderate green*/
}


/*Titre de la Page et du menu gauche :*/
h1{
	line-height: 2em;
	text-align: center;
	vertical-align: middle;
	font-family: Verdana, Arial, sans-serif;
	color: #537530; /*Dark moderate green*/
	font-size: 0.5em;
	font-weight: 400;
}

	/*liste :*/
h2 {
	line-height: 1em;
	text-align: left;
	font-family: Verdana, Arial, sans-serif;
	color: #537530 /*Dark moderate green*/
	font-size: 12px;
	font-weight: 400;
	
	}

p {
	font-size: 12px;
	line-height: 12px;
	font-weight: 300;
	color:#537530;/*Dark moderate green*/
	max-width: 55em;
}

p a {
	color: #537530;/*Dark moderate green.*/
	text-decoration: none;
}


strong {
	color: #303175;/*Dark moderate blue.*/
}

	
nav {
	position: fixed;
	top: 0px;
	height: 50px;
	width: 100%;
	z-index: 9999;
	background-color: #FBFAF7;
	margin-top: 0px;
	-moz-box-shadow: 0 2px 2px rgba(0,0,0,0.2);
	-webkit-box-shadow: 0 2px 2px rgba(0,0,0,0.2);
	box-shadow: 0 2px 2px rgba(0,0,0,0.2);

	overflow: hidden; /* Don't show anything outside the nav */
	
}

nav ul {
	margin: 0;
	padding: 0;
	font-size: 12px;
	font-family: Verdana, Arial, sans-serif;
	text-align: center;
	text-transform: uppercase;
	font-weight: 300;
	list-style-type: none;
	max-height: 100px;
	position: relative;
	visibility: visible;

}

nav li {
	cursor: pointer;
	display: inline-block;
	
}

nav a {
	display: inline-block;
	padding: 0 1em;
	font-size: 12px;
	color: #537530;/*Dark moderate green*/
	font-weight: 500;
	letter-spacing: 0.1em;
	text-decoration: none;
	text-transform: uppercase;
	white-space: nowrap;
	line-height: 50px; /* Menu height */
	height:50px; /* Menu height */
}

nav a:hover {
	color: #C1C641;/*jaune-vert*/
}

nav li.active a {
	font-weight: 400;
	color: #A06D36;/*marron-orangé*/
}

nav li:last-child { /* The menu button */
	position: absolute; /* Move the menu button out of flow */
	right: 0;
	bottom: 50px; /* Move upwards, the same distance as the menu height */
	background-image: linear-gradient(to right, rgba(251, 250, 247, 0) 0, rgba(251, 250, 247, 1) 2em);
	padding-left: 3em;
}

nav li:nth-last-child(2) { /* The close button */
	display: none;
}

nav#menu:target {/*conteneur block menu2*/
  top: 18px;
  height: auto;
  padding: 0;
  background-color: rgba(117, 190, 218, 0.0); /* 0.0 - transparent */
  
}

nav#menu:target ul { max-height: none;
 top: 0;                         /* position en haut */
  left: 0;                        /* à gauche */
  width: 17em;
  font-size: 9px;         /* valeur de la largeur du bloc liste menu 2 */
  min-height: 100vh;              /* occupe toute la hauteur du viewport */
  background-color: #FBFAF7; /* blanc cassé de body */
  }

nav#menu:target li {
 display: block;
width:10%;  /* valeur de largeur pour l'ensemble du bloc (liste et close) */
height: 1.5em; /*interlignes de la liste*/
}

nav#menu:target a {/*on  The close button et les éléments de la liste close menu */
  display: block;
  padding: 0 2em;
  
}

nav#menu:target a:hover { background-color: none; }/*on  The close button et les éléments de la liste close menu */

nav#menu:target li:not(:first-child) { margin-top: 2px; }

nav#menu:target li:last-child { display: none; }

nav#menu:target li:nth-last-child(2) {
  display: block; /* The close button */
  position: absolute;
  top:160px;
  left: 0;
  margin: 0;
 
}

	


.en-cours{
	font-weight: 400;
	color: #A06D36;/*marron-orangé*/
}


 /*----------- conteneur des div menu gauche et page principale---------------------------*/

	
#titrePage{
clear: both;
position: relative;
	width: 100%;
	margin: 0;
	padding: 0;	
	color: #537530; /*Dark moderate green*/
	}
#titrePage	h1{
	line-height: 2em;
	text-align: center;
	vertical-align: middle;
	font-family: Verdana, Arial, sans-serif;
	color: #537530; /*Dark moderate green*/
	font-size: 15px;
	font-weight: 400;
}
	
#menu-gauche{
	position: fixed;
	z-index: 998;
	top: 170px;
	width: 18%;
	padding: 0 0 0 15px;
	height: 100vh;
	font-family: Verdana, Arial, sans-serif;
	text-align:left;
	vertical-align: top;
	font-size: 0.5em;
	color: #537530;/*Dark moderate green*/
	font-weight: 300;
	letter-spacing: 0.1em;
	overflow: auto;
	
}
	 
#menu-gauche h3{
	text-align: left;
	font-size: 15px;
	font-weight: 400;
	line-height: 2em;	
	}
		
#menu-gauche ol{
	min-height: 600px;
	 }

			
#menu-gauche ol h2{
	text-align: left;
	font-size: 12px;
	font-weight: 300;
	color: #537530;/*Dark moderate green*/
	}	
		
#menu-gauche ol h4{
	text-align: left;
	font-size: 12px;
	font-weight: 300;
	color: #303175;/*Dark moderate blue.*/
}

#menu-gauche li.a {
	text-decoration: none;
	font-size: 12px;
	color: #537530;
	}
	
#menu-gauche li.active a {
		color: #A06D36;/*marron-orangé*/
}

#sujet{
	float: right;
	width: 82%;
	text-align: center;
	}
#sujet img{	
  max-width: 100%;
  height: auto;
}