body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
  color: #333;
}

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

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

.products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 20px;
}

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

.product-card img {
  max-width: 100%;
  border-radius: 4px;
}

button {
  background: #333;
  color: #fff;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
  border-radius: 4px;
  margin-top: 10px;
}

button:hover {
  background: #555;
}

main {
  padding: 20px;
}

ul {
  list-style: none;
  padding: 0;
}