/* Style global */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

/* Header et navigation */
header {
  background-color: #3b5998;
  color: white;
  padding: 15px;
  text-align: center;
}

header h1 {
  margin: 0 0 10px;
  font-size: 1.8em;
}

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

.menu li {
  margin: 5px 10px;
}

.menu a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  padding: 8px 12px;
  border-radius: 5px;
  transition: background 0.3s;
}

.menu a:hover {
  background: #2d4373;
}

/* Sections */
main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

h2 {
  color: #3b5998;
}

/* Footer */
footer {
  text-align: center;
  padding: 10px;
  background: #eee;
  margin-top: 20px;
  font-size: 0.9em;
}