header{
    position: relative;
    width: 100%;
    background-image: url(../images/accueil/hands.jpg);
    background-position: bottom;
    background-size: cover;
    background-repeat: no-repeat;

    height: 200px;
    text-align: center;
}
h1{
    padding-top: 105px;
}
#bandeauNoir,
nav {
    position: fixed;
}
#burger{
    position: relative;
}
.menu {
    display: none;
}
#bandeauNoir {
    background-color: #000;
    margin-top: 0;
    width: 100%;
    height: 60px;
    z-index: 100;
    display: block;
}
.menu,
nav {
    width: 100%;
    z-index: 101;
}
nav ul {
    margin: 0 auto;
    text-align: center;
    overflow: hidden;
    color: #000;
    line-height: 30px;
}
nav ul li {
    display: inline-block;
    padding: 16px 20px 20px;
}
#monMenu span{
    text-transform: uppercase;
}
header a:link,
header a:visited {
    color: #fff;
    text-decoration: none;
    -moz-transition: all .4s ease;
    -o-transition: all .4s ease;
    -webkit-transition: all .4s ease;
    transition: all .4s ease;
}
header nav li a:hover {
    text-decoration: none;
    -moz-transition: all .4s ease;
    -o-transition: all .4s ease;
    -webkit-transition: all .4s ease;
    transition: all .2s ease;
    opacity: 0.7;
}
.menu {
    background-color: #e3e3e3;
    margin-left: auto;
}
#burger {
    background-color: #000;
    height: 50px;
    width: 50px;
    border-radius: 50px;
    transition: all 1s ease;
}
.bar {
    position: absolute;
}
#burger:hover {
    cursor: pointer;
}
.bar {
    background-color: #FFF;
    margin: 0 10px;
    height: 3px;
    width: 30px;
    border-radius: 3px;
}
#bar1 {
    margin-top: 15px;
    -webkit-transition: all .5s ease;
    -moz-transition: all .5s ease;
    -ms-transition: all .5s ease;
    -o-transition: all .5s ease;
    transition: all .5s ease;
}
#bar2 {
    margin-top: 23px;
    transition: all .5s ease;
}
#bar3 {
    -webkit-transition: all .5s ease;
    -moz-transition: all .5s ease;
    -ms-transition: all .5s ease;
    -o-transition: all .5s ease;
}
#bar3 {
    margin-top: 31px;
    transition: all .5s ease;
}
.transformation #bar1 {
    -webkit-transform: translateY(10px) rotate(405deg);
    -moz-transform: translateY(10px) rotate(405deg);
    -o-transform: translateY(10px) rotate(405deg);
    -ms-transform: translateY(10px) rotate(405deg);
    transform: translateY(10px) rotate(405deg);
}
.transformation #bar3 {
    -webkit-transform: translateY(-6px) rotate(315deg);
    -moz-transform: translateY(-6px) rotate(315deg);
    -o-transform: translateY(-6px) rotate(315deg);
    -ms-transform: translateY(-6px) rotate(315deg);
    transform: translateY(-6px) rotate(315deg);
}
.transformation #bar2 {
    opacity: 0;
    width: 0;
}
.transformationback #bar2 {
    opacity: 1;
    width: 30px;
}
@media only screen and (max-width:62.5em) {
    /*1000px*/
    nav,
    nav ul,
    nav ul li:hover {
        background-color: #000;
    }

    #bandeauNoir,
    .retract_menu {
        height: 0;
    }

    nav ul {
        max-height: 0;
        width: 100%;
        transition: all 1s ease;
    }
    nav ul li:first-child {
        border-top: 1px solid #313131;
    }
    nav ul li {
        width: 100%;
        box-sizing: border-box;
        text-align: center;
        border-bottom: 1px solid #313131;
        padding: 15px;
    }
    nav ul li:hover {
        cursor: pointer;
    }
    .menu {
        display: block;
        cursor: pointer;
    }
    .deplie_menu {
        max-height: 19em;
    }
}