body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}
header {
  background: #004080;
  color: white;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav a {
  color: white;
  margin-left: 15px;
  text-decoration: none;
}
main {
  padding: 40px;
  text-align: center;
}
.cta-button {
  display: inline-block;
  padding: 12px 20px;
  background: #007BFF;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 15px;
  position: fixed;
  bottom: 0;
  width: 100%;
}