#overlay3{
    display: none;
    position: fixed;
    top:0; right:0; bottom:0; left:0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}
#overlay3:target{
    display: block;
}
#overlay4{
    display: none;
    position: fixed;
    top:0; right:0; bottom:0; left:0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}
#overlay4:target{
    display: block;
}
#overlay5{
    display: none;
    position: fixed;
    top:0; right:0; bottom:0; left:0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}
#overlay5:target{
    display: block;
}
.popup_block{
    background: #fff;
    padding: 20px;
    border: 20px solid #ddd;
    position: relative;
    margin: 10% auto;
    width: 40%;
    box-shadow: 0px 0px 20px #000;
    border-radius: 10px;
}
img.btn_close {
    float: right;
    margin: -55px -55px 0 0;
}
.lien_button {
	 background-color: #1c87c9;
	 border: none;
	 color: white;
	 padding: 4px 16px;
	 text-align: center;
	 text-decoration: none;
	 display: inline-block;
	 font-size: 15px;
	 margin: 4px 2px;
	 cursor: pointer;
	 }
.lien_button2 {
	 background-color: #1c87c9;
	 border: none;
	 color: white;
	 padding: 2px 3px;
	 text-align: center;
	 text-decoration: none;
	 display: inline-block;
	 font-size: 14px;
	 margin: 0px 0px;
	 cursor: pointer;
	 }
	 
	 .lien_button3{
	 background-color: dimgray;
border: none;
color: white;
padding: 5px 10px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 11px;
margin: 0px 0px;
cursor: pointer;
border-radius: 40% 40% 40% 40%;
	 }
	 
a.lien_button3:hover  {
    color: black;
    background-color: #A9A9A9;
}
	 
	 div #div_volante,div #div_volante2, div #div_volante3{
   width: auto;
 
}