html {
    max-width: 70ch;
    padding: 3em 1em;
    margin: auto;
    line-height: 1.25;
    font-size: 1.25em;
    color-scheme: light dark;
}

:root {
    font-family: monospace;
}

h1,h2,h3,h4,h5,h6 {
    margin: 3em 0 1em;
}