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

header {
  background: #000;
  color: #fff;
  padding: 20px;
  text-align: center;
}

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

.banner {
  padding: 60px;
  text-align: center;
  background: #ddd;
}

section {
  padding: 30px;
}

.produtos li {
  margin: 10px 0;
  font-size: 18px;
}

footer {
  background: #000;
  color: #fff;
  text-align: center;
  padding: 15px;
}