<style>
  body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }

  /* Entête fixé */
  header {
    font-family: Arial, sans-serif;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #333;
    color: white;
    z-index: 1000;
  }

  /* Conteneur interne centré */
  .header-container {
    font-family: Arial, sans-serif;
    max-width: 1200px; /* largeur max */
    margin: 0 auto;    /* centrage horizontal */
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
  }

  /* Logo */
  .logo {
    font-size: 18px;
    font-weight: bold;
  }

  /* Menu */
  nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
  }

  nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: color 0.3s;
  }

  nav ul li a:hover {
    color: #ffcc00;
  }

  /* Contenu principal */
  main {
    font-family: Arial, sans-serif;
    flex: 1;
    padding: 80px 20px 60px; /* espace pour header et footer fixés */
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
  }

  /* Pied de page fixé */
  footer {
    font-family: Arial, sans-serif;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 20px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 18px;
    margin-top: 20px;
  }

  dl {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 8px 18px;
    margin: 0;
  }

  dt {
    font-weight: bold;
  }

  dd {
    margin: 0;
  }

  ul {
    text-align: left;
  }

  a {
    color: #0b62d6;
    text-decoration: none;
  }
</style>
