body {
    box-sizing: border-box;
    margin: 0 auto;
    padding: 0 20px;
    max-width: 480px;
    font-family: system-ui, sans-serif;
    font-size: 16px;
}
h1 {
    font-size: 21px;
    text-align: center;
}
h2 {
    font-size: 19px;
    text-decoration: underline;
}
img {
    display: block;
    margin: 10px auto;
    width: 100%;
    max-width: 360px;
}

.logo {
    max-width: 100px;
}