header{

    user-select: none;
    top : 0;
    z-index: 9998;
    position: fixed;
    width: 100%;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    background-color: white;
    border-radius: 0 0 10px 10px;
    padding: 1% 0% ;
  
    display: inline-block;  
    text-align: center;
  }
  
  /*    -------  nav  ------   */
  .navbar-toggler{
  margin-left: 1%;
  display: none;
  position: relative;
  width: 40px;
  height: 35px;
  background-color: #7c7c7c;
  border: none;
  padding: auto;
  border-radius: 5px;
  }
  .navbar-toggler div {
  width: 100%;
  height: 5px;
  background-color: #eaeaea;
  margin: 4px 0;
  }
  
  .change .bar1 {
  transform: rotate(-45deg) translate(-7px, 6px);
  border-radius: 3px;
  }
  
  .change .bar2 {
  opacity: 0;
  }
  
  .change .bar3 {
  transform: rotate(45deg) translate(-7px, -6px);
  border-radius: 3px;
  }
  
  #main-nav{
  display: block;
  }
  nav ul{
    padding: 0;
  }
  nav li{
    padding: 0% 6%;
    color: rgb(0, 0, 0);
    display: inline-block;
  }
  @keyframes grandirsousbarre {
    0% {
      width: 0;
      margin-left: 50%;
    }
    100% {
      margin-left: 0%;
      width: 100%;
    }
  }
  
  @keyframes retrecirsousbarre {
    0% {
      width: 100%;
      margin-left: 0%;
    }
    100% {
      margin-left: 50%;
      width: 0;
    }
  }
  
  .sousbarre {
    height: 2px;
    margin-left: 50%;
    background-color: rgb(0, 0, 0);
    width: 0; /* Définir une largeur initiale */
  
    animation: retrecirsousbarre 0.5s forwards;
    }
  nav li:hover .sousbarre{
    animation: grandirsousbarre 1s forwards; /* Lancer l'animation */
  }
  nav li:hover{
    color:rgb(80, 80, 80);
  }
  nav a{
    margin-top: 6%;
  
    display: block;
    text-decoration: none;
    color: inherit;
  
    
    font-size: 16px;
    letter-spacing: .2em;
    word-spacing: 0;
    line-height: 1.3em;
    text-transform: none;
    font-weight: normal;
    
  }




  .changee{
    opacity: 0;
    }

    @media (max-width: 600px) {
      #main-nav {
        display: none;
      }
      .navbar-toggler,nav li{ 
        display: block;
      }

    }