/* Typographie */
body {
  font-family: 'Segoe UI', 'Roboto', sans-serif;
  background-color: #FFFFFF;
  color: #111111;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

/* En-tête */
header {
  background: linear-gradient(90deg, #008000, #FFD700);
  color: #FFFFFF;
  padding: 1.5rem;
  text-align: center;
}

/* Navigation */
nav {
  background-color: #D40000;
  display: flex;
  justify-content: center;
  padding: 0.5rem;
}

nav a {
  color: #FFFFFF;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}

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

/* Sections principales */
section {
  padding: 2rem;
  max-width: 1200px;
  margin: auto;
}

/* Titres */
h1, h2, h3 {
  color: #008000;
}

/* Boutons */
button, .btn {
  background-color: #FFD700;
  color: #111111;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}

button:hover, .btn:hover {
  background-color: #D40000;
  color: #FFFFFF;
}

/* Pied de page */
footer {
  background-color: #111111;
  color: #FFFFFF;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}

/* Responsivité */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
  }

  nav a {
    margin: 0.5rem 0;
  }

  section {
    padding: 1rem;
  }
}