.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-color: #F5DEB3;
  }
 
  header, nav, main, footer {
    padding: 10px;
    text-align: center;
  }
 
  h1, h2 {
    color: #4B0082;
  }
 
  ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #FFDAB9;
  }
 
   li {
    float: left;
  }
 
   li a {
    display: block;
    color: #4B0082;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
 
   li a:hover {
    background-color: #4B0082;
    color:  white;
  }
 
  footer {
    background-color: #FFDAB9;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60
  }
  .petite-image {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 200px;
    height: auto;
  }