body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    max-width: 640px;
    margin: 40px auto;
    padding: 0 20px;
    line-height: 1.6;
    color: #222
}

h1 {
    color: #2a4d6e
}