body {
  font-family: Arial, sans-serif;
  background-color: #f7f7f7;
  color: #333;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background-color: #0078d4;
  color: white;
  padding: 20px;
}

main {
  padding: 40px;
}

button {
  background-color: #0078d4;
  color: white;
  padding: 10px 20px;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #005fa3;
}