body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
}

header {
  background-color: #667eea;
  color: #ffffff;
  padding: 20px;
  text-align: center;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

.resume {
  background-color: #ffffff;
  padding: 20px;
  border: 1px solid #dddddd;
  margin-bottom: 20px;
}

.livraison {
  background-color: #ffffff;
  padding: 20px;
  border: 1px solid #dddddd;
  margin-bottom: 20px;
}

.promo {
  background-color: #ffffff;
  padding: 20px;
  border: 1px solid #dddddd;
  margin-bottom: 20px;
}

.paiement {
  background-color: #ffffff;
  padding: 20px;
  border: 1px solid #dddddd;
  margin-bottom: 20px;
}

button {
  background-color: #764ba2;
  color: #ffffff;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #e94560;
}