.btn
{
    height: 100px;
    width : 100px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    right: 20px;
    bottom: 20px;
}

.icone
{
    width: 50px;
    cursor: pointer;
}

body
{
 background-image: url(johnpage2.jpg);
 background-size: cover;
}

h1
{
color: white;
}
h3
{
    color: white;
}
ul
{
    color: white;
}

.menu 
{
  position: absolute;
  display: inline-block;
  top:20px;
  right: 20px;
}

.bouton-menu 
{
  color: rgb(205, 205, 205);
  background-color: rgb(63, 63, 63);
  border-radius: 5px;
  padding: 10px;
  border: none;
  cursor: pointer;
}

.menu-deroulant 
{
  display: none;
  position: absolute;
  top: 30px;
  right: 0;
  z-index: 1;
  background-color: #f9f9f9;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  border-radius: 5px;
}

.menu-deroulant a 
{
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  border-color: black;
}

.menu-deroulant a:hover 
{
  background-color: #e8e8e8;
}

.menu:hover .menu-deroulant 
{
  display: block;
}

#Lepremier
{
  width : 270px;
  height : 200px;
  margin-left: 45px;
  margin-top: 40px;

}
.encadrement-image {
  border: 2px solid black;
}

.encadrement-image:hover {
  border: 2px solid red;
}

#Lesecond
{
  width: 270px;
  height: 200px;
  margin-left: 39px;
  margin-top: 40px;
}
#Letrois
{
  width: 270px;
  height: 200px;
  margin-left: 39px;
  margin-top: 40px;
}
#Lequatre
{
  width: 200px;
  height: 200px;
  margin-left: 39px;
  margin-top: 40px;
}