body {
  font-family: 'Segoe UI', sans-serif;
  background: #f4f4f4;
  color: #222;
  margin: 0;
  padding: 0;
}
header {
  background: #1b4332;
  color: white;
  padding: 1em 0;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1em;
}
nav a {
  color: white;
  margin-right: 1em;
  text-decoration: none;
  font-weight: bold;
}
footer {
  background: #1b4332;
  color: white;
  text-align: center;
  padding: 1em;
  margin-top: 3em;
}