body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

header {
  background-color: #0078D4;
  color: white;
  padding: 20px;
}

main {
  padding: 40px;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  color: white;
  background-color: #0078D4;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
}

footer {
  margin-top: 30px;
  padding: 10px;
  font-size: 0.9em;
  color: #555;
}