body {
  background-color: #ffffff;
  color: #000000;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}

h1 {
  font-size: 3rem;
}

button {
  padding: 1rem 2rem;
  font-size: 1.5rem;
  background-color: #007bff;
  color: #ffffff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}