body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f9;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #ffffff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  max-width: 650px;
  width: 90%;
}

h1 {
  color: #007bff;
  text-align: center;
}

h2,
h4 {
  margin-top: 20px;
  color: #555;
}

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

ul li {
  margin: 10px 0;
}

a {
  color: #007bff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

pre {
  background: #f8f8f8;
  padding: 10px;
  border-radius: 4px;
  font-size: 14px;
  overflow-x: auto;
}