body {
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #f8fafc;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: auto;
}

.products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
}

.product {
  background: #1e293b;
  padding: 15px;
  border-radius: 12px;
  text-align: center;
}

.product button {
  background: #22c55e;
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 8px;
}

.cart {
  background: #1e293b;
  padding: 20px;
  border-radius: 12px;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  margin: 10px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid #334155;
}

#checkout {
  background: #3b82f6;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  margin-top: 10px;
}