body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
}

header {
  background: #007BFF;
  color: white;
  padding: 15px;
  text-align: center;
}

nav a {
  margin: 0 10px;
  color: white;
  text-decoration: none;
}

section {
  padding: 20px;
  margin: 10px auto;
  max-width: 900px;
  background: #fff;
  border-radius: 6px;
}

.producto {
  border: 1px solid #ddd;
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 6px;
}

button {
  padding: 10px 15px;
  background: #28a745;
  border: none;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #218838;
}

footer {
  text-align: center;
  padding: 15px;
  background: #333;
  color: white;
  margin-top: 20px;
}