:root {
    --bg: #ffffff;
    --fg: #1a1a1a;
    --muted: #5a5a5a;
    --line: #e0e0e0;
    --link: #0b57d0;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1f2023;
        --fg: #e6e6e6;
        --muted: #a0a0a0;
        --line: #35373b;
        --link: #8ab4f8;
    }
}
* { box-sizing: border-box; }
body {
    margin: 0;
    padding: 48px 16px;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 42rem; margin: 0 auto; }
h1 { font-size: 1.9rem; margin: 0 0 .25rem; letter-spacing: -.01em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 .5rem; }
.sub { color: var(--muted); margin: 0 0 2rem; }
a { color: var(--link); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
ul { padding-left: 1.25rem; }
li { margin: .3rem 0; }
footer {
    margin-top: 3rem; padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted); font-size: .9rem;
}