body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}
header {
  background: #333;
  color: #fff;
  padding: 1rem 0;
  text-align: center;
}
nav {
  display: flex;
  justify-content: center;
  background: #444;
  flex-wrap: wrap;
}
nav a {
  color: #fff;
  padding: 0.8rem 1.2rem;
  text-decoration: none;
}
nav a:hover {
  background: #666;
}
.banner {
  background: url('https://via.placeholder.com/1200x400?text=Shoes+Banner') no-repeat center center/cover;
  color: white;
  text-align: center;
  padding: 4rem 1rem;
  font-size: 1.5rem;
  font-weight: bold;
}
.container {
  padding: 2rem;
  max-width: 1000px;
  margin: auto;
}
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}
@media (max-width: 768px) {
  nav {
    flex-direction: column;
  }
  .banner {
    font-size: 1.2rem;
    padding: 2rem 1rem;
  }
}