body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background: #111;
  color: white;
  padding: 15px 20px;
}

nav a {
  color: white;
  margin-right: 15px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

h1 {
  margin-bottom: 10px;
}