body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: #f9f9f9;
}
header {
  background: #0b6aa2;
  color: #fff;
  padding: 20px;
  text-align: center;
}
nav {
  display: flex;
  justify-content: center;
  background: #eee;
  padding: 10px;
}
nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #0b6aa2;
  font-weight: bold;
}
section {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}
footer {
  text-align: center;
  padding: 10px;
  background: #0b6aa2;
  color: #fff;
  position: fixed;
  bottom: 0;
  width: 100%;
}