body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background: #f2f2f2;
}

header {
  background: #333;
  color: white;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.product {
  background: white;
  padding: 15px;
  border-radius: 8px;
  width: 200px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.product button {
  margin-top: 10px;
  padding: 8px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.product button:hover {
  background: #218838;
}