body {
  font-family: Arial, sans-serif;
  margin: 0; padding: 0;
  background: #f7f7f7;
  color: #333;
}

.container {
  max-width: 900px;
  margin: 50px auto;
  padding: 20px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

nav {
  background: #007BFF;
  padding: 15px;
  text-align: center;
}

nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

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

h1, h2 {
  color: #007BFF;
}

.footer {
  text-align: center;
  padding: 20px;
  color: #888;
  font-size: 14px;
  margin-top: 40px;
}