body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    text-align: center;
}
#toptext {
    font-size: xx-large;
}
button {
    border-radius: 80px;
    padding: 15px 32px;
    font-size: 16px;
}