:root {
    font-family: system-ui, -apple-system, sans-serif;
    color-scheme: light dark;
}
body {
    margin: 0;
}
main {
    max-width: 720px;
    margin: 12vh auto;
    padding: 24px;
    line-height: 1.6;
}
nav {
    display: flex;
    gap: 18px;
}
a {
    text-underline-offset: 3px;
}