body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f7fa;
  color: #333;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

header {
  background: #0d1b2a;
  color: white;
  padding: 15px 0;
}

nav a {
  color: #ccc;
  margin-right: 15px;
  text-decoration: none;