body {
  font-family: Arial;
  margin: 0;
  background: #f5f5f5;
}

.navbar {
  background: #111;
  padding: 12px;
}

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

.container {
  max-width: 900px;
  margin: auto;
  background: white;
  padding: 20px;
}

h1 {
  border-bottom: 1px solid #eee;
}