body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #fff;
  color: #333;
}

a {
  text-decoration: none;
  color: #0366d6;
}

a:hover {
  text-decoration: underline;
}

.navbar {
  background: #f5f5f5;
  padding: 10px 20px;
  border-bottom: 1px solid #ddd;
}