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

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
  margin-bottom: 60px;
}

h1, h2 {
  color: #222;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

h2 {
  margin-top: 30px;
  margin-bottom: 10px;
  border-bottom: 1px solid #ddd;
  padding-bottom: 5px;
}

ul, ol {
  margin-left: 20px;
  margin-bottom: 20px;
}

p {
  margin-bottom: 15px;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}