body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  text-align: center;
}

header {
  background: #0073e6;
  color: white;
  padding: 15px;
}

.product-img {
  max-width: 300px;
  margin-top: 20px;
}

.desc {
  font-size: 1.1em;
  margin: 15px;
}

.price {
  color: red;
  font-size: 1.2em;
}

.download-btn {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: green;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.download-btn:hover {
  background: darkgreen;
}

footer {
  margin-top: 40px;
  padding: 10px;
  font-size: 0.9em;
  background: #eee;
}