body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #fafafa;
  color: #333;
}

header {
  background: #6dd6a8;
  padding: 15px;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav a {
  margin: 0 10px;
  color: #fff;
  text-decoration: none;
}

main {
  padding: 20px;
}

h2, h3 {
  color: #444;
}

footer {
  text-align: center;
  padding: 15px;
  background: #eee;
  margin-top: 20px;
}