body {
    display: flex;
    justify-content: center;
    font-size: 200%;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
}

ul {
    margin: 0;
    padding: 0;
}

li {
    list-style-type: none;
}

button {
    font-size: inherit;
    margin: 1rem 0;
}

#content {
    text-align: center;
}