body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  color: #333;
  background: #f0f8ff;
}

.header {
  background: linear-gradient(135deg, #6dd5ed, #2193b0);
  color: #fff;
  padding: 10px 20px;
  text-align: center;
}

.menu a {
  color: #fff;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

.menu a:hover {
  text-decoration: underline;
}

main {
  padding: 20px;
}

h1, h2 {
  color: #2193b0;
}

footer {
  background: #2193b0;
  color: #fff;
  text-align: center;
  padding: 10px 0;
  position: fixed;
  width: 100%;
  bottom: 0;
}

#product-catalog {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

#product-catalog div {
  border: 1px solid #ddd;
  padding: 10px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}