nav{
    width:40px;
  	color: #ed7b25;
    position: relative;
  	font-size: 1.5em;
    top: 0px;
  	z-index: 1000;
}

nav ul{
    list-style-type: none;
}

nav ul li{
    float: left;
    width: 40px;
    text-align: left;
    position: relative;
	margin: 10px;
}

nav ul::after{
    content: "";
    display: table;
    clear: both;
}

nav a{
    display: block;
    text-decoration: none;
    color: #3b3f44;
    border-bottom: 2px solid transparent;
    padding: 10px 0px;
}

nav a:hover{
    color: #ed7b25;
    border-bottom: 2px solid gold;
}

.sous{
    display: none;
    box-shadow: 0px 1px 2px #CCC;
    background-color: white;
  	font-size : 1em;
    position: absolute;
    width: 400px;
    z-index: 1000;
}
nav > ul li:hover .sous{
    display: block;
}
.sous li{
    float: none;
    width: 400px;
    text-align: left;
}
.sous a{
    padding: 10px;
    border-bottom: none;
}
.sous a:hover{
    border-bottom: none;
    background-color: RGBa(200,200,200,0.1);
}
.deroulant > a::after{
    content:" ";
    font-size: 1em;
}

.conteneur{
  margin: 50px 20px;
  height: 1500px;
}