header * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
    }

    header {
      background: #225;
      color: #fff;
    }

    .navbar {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.5rem 1rem;
    }

    .logo {
      font-size: 1.3rem;
      font-weight: bold;
    }

    .logo > a
    {color: #fff;}

    /* Bouton hamburger (mobile) */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 4px;
      cursor: pointer;
    }

    .menu-toggle span {
      width: 24px;
      height: 3px;
      background: #ffffff;
    }

    /* Menu principal */
    .nav-links {
      list-style: none;
      display: flex;
      gap: 1rem;
    }

    .nav-links > li {
      position: relative;
    }

    .nav-links a {
      color: #fff;
      text-decoration: none;
      padding: 0.5rem 0.75rem;
      display: block;
      transition: background 0.3s;
    }

    .nav-links > li:hover > a {
      background: #2a3c83;
    }

    /* Sous-menus */
    .dropdown {
      position: absolute;
      top: 100%;
      left: 0;
      background: #333;
      min-width: 180px;
      list-style: none;
      display: none;
      z-index: 10;
    }

    .dropdown li a {
      padding: 0.5rem 0.75rem;
      white-space: nowrap;
    }

    .nav-links > li:hover .dropdown {
      display: block;
    }


    main {
      padding: 1px;
      max-width: 1200px;
      margin: auto;
    }

    #certification {
      text-align: end;
      padding-top: 1px;
      font-size: smaller;
    }

    th, td {
        border: solid 1px;
        padding: 3px;
        }
    th {background-color: bisque;}
    table {border-collapse: collapse;}

    .container {
      display: grid;
      max-width: 1200px;
      grid-template-columns: auto;
      justify-content: center;
    }

    .accueil {
      width: 80%;
      background-color:brown;
      color: #fff;
      padding : 20px;
      text-align: center;
      margin-top:40px;
    }
    .sous-titre {
      font-size: small;
      font-style: italic;
      color:cornsilk;
    }
    .mini {
      font-size:x-small ;
    }
    .sans_ia {
      font-size: large;
      align-self:self-end;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .menu-toggle {
        display: flex;
      }

      .nav-links {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #222;
        flex-direction: column;
        gap: 0;
        display: none;
      }

      .nav-links.show {
        display: flex;
      }

      .nav-links > li {
        border-top: 1px solid #333;
      }

      /* Sous-menus en mobile : affichage en accordéon */
      .nav-links > li:hover .dropdown {
        display: none; /* on désactive le hover pour mobile */
      }

      .nav-links > li.open .dropdown {
        display: block;
        position: static;
      }

      .dropdown {
        background: #333;
        position: static;
      }
    }