body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background-color: #333;
  color: #fff;
  padding: 20px;
}

header h1 {
  margin: 0;
  font-size: 24px;
}

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

section {
  margin-bottom: 40px;
}

h2 {
  color: #333;
}

p {
  line-height: 1.5;
}