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

.container {
  max-width: 700px;
  margin: 2rem auto;  /* ← centre horizontalement */
  padding: 2rem;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  border-radius: 8px;
}




header {
  text-align: center;
  margin-bottom: 2rem;
}

.menu {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.menu li a {
  color: #007acc;
  font-weight: bold;
  text-decoration: none;
  padding: 0.5rem;
  transition: background 0.2s, color 0.2s;
}

.menu li a:hover {
  background-color: #007acc;
  color: white;
  border-radius: 4px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem auto;
}

footer {
  text-align: center;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #666;
}

a {
  color: #007acc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.content-section {
  display: none;
}

.content-section.active {
  display: block;
}

.hidden {
  display: none;
}