body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background-color: #24292e;
  color: white;
  padding: 20px;
  text-align: center;
}

main {
  padding: 20px;
}

section {
  margin-bottom: 20px;
}

h1, h2 {
  color: #0366d6;
}

ul {
  list-style-type: square;
  padding-left: 20px;
}

a {
  color: #28a745;
  text-decoration: none;
}

footer {
  background-color: #e1e4e8;
  text-align: center;
  padding: 10px;
  font-size: 14px;
}