body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    flex-direction: column;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

h1 {
    text-align: center;
}

button {
    display: block;
    margin: 0 auto;
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}