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

header {
  background: #f4f4f4;
  padding: 1rem;
  text-align: center;
}

main {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.libraries {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.library-card {
  border: 1px solid #ddd;
  padding: 1.5rem;
  border-radius: 5px;
}

.btn {
  display: inline-block;
  background: #333;
  color: white;
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: 5px;
  margin-top: 1rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #f4f4f4;
}

pre {
  background: #f4f4f4;
  padding: 1rem;
  border-radius: 5px;
  overflow-x: auto;
}