body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
  background-color: #f0f0f0;
}
header {
  background-color: #333;
  color: white;
  padding: 10px 0;
}
nav a {
  color: white;
  text-decoration: none;
  margin: 0 10px;
}
nav a:hover {
  text-decoration: underline;
}
main {
  margin-top: 20px;
}
h2 {
  color: #333;
}
p {
  font-size: 18px;
  color: #666;
}
.product-preview {
  margin-top: 20px;
  padding: 10px;
  background-color: white;
  display: inline-block;
  border: 1px solid #ccc;
}
.product-list {
  margin-top: 20px;
}
.product-item {
  display: inline-block;
  margin: 10px;
  padding: 10px;
  background-color: white;
  border: 1px solid #ccc;
  width: 200px;
}