body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #004aad;
  color: white;
  padding: 15px 20px;
  text-align: center;
}

nav {
  background: #00337a;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav ul li {
  margin: 0 15px;
}

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

nav ul li a:hover {
  text-decoration: underline;
}

.container {
  max-width: 900px;
  margin: 30px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 15px;
  background: #00337a;
  color: white;
  margin-top: 30px;
}

/* ✅ Burger menu */
.menu-toggle {
  display: none;
  background: #00337a;
  color: white;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: 10px 20px;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    text-align: center;
    display: none; /* caché par défaut */
  }

  nav ul.show {
    display: flex; /* affiché quand on clique */
  }

  .menu-toggle {
    display: block; /* bouton visible en mobile */
  }

  .container {
    margin: 15px;
    padding: 15px;
  }

  header h1 {
    font-size: 1.5em;
  }

  img {
    max-width: 100%;
    height: auto;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.2em;
  }

  nav ul li a {
    font-size: 0.9em;
  }

  .container {
    padding: 10px;
  }
}