body {
  font-family: Arial;
  margin: 0;
  background: #f4f4f4;
}

header {
  background: #0d6efd;
  color: white;
  padding: 20px;
  text-align: center;
}

nav {
  background: #222;
  padding: 10px;
  text-align: center;
}

nav a {
  color: white;
  margin: 10px;
  text-decoration: none;
}

section {
  padding: 30px;
  text-align: center;
}

button {
  background: #0d6efd;
  color: white;
  padding: 10px 20px;
  border: none;
  cursor: pointer;
}

footer {
  background: #222;
  color: white;
  padding: 15px;
  text-align: center;
}