body {
  font-family: Arial, sans-serif;
  background: #000;
  color: gold;
  margin: 0;
}
header {
  background: #111;
  text-align: center;
  padding: 1rem;
}
nav a {
  color: gold;
  margin: 0 10px;
  text-decoration: none;
}
main {
  padding: 2rem;
}
.product {
  background: #111;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
}
button {
  background: gold;
  color: black;
  padding: 0.5rem 1rem;
  border: none;
  cursor: pointer;
}
.cart-modal {
  padding: 1rem;
  background: #222;
}