:root {
    color-scheme: light dark;
    --bg: #ffffff;
    --text: #1b1b1f;
    --muted: #5d5e66;
    --primary: #3a66c4;
    --rule: #e3e3e8;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121316;
        --text: #e4e2e6;
        --muted: #a9aab2;
        --primary: #6fa0ff;
        --rule: #2e3036;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
    max-width: 42rem;
    margin: 0 auto;
    padding: 2rem 1rem 4rem;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rule);
}

a {
    color: var(--primary);
}

h1 {
    font-size: 1.75rem;
    line-height: 1.25;
    margin: 2rem 0 0.25rem;
}

h2 {
    font-size: 1.15rem;
    margin: 2rem 0 0.25rem;
}

section + section {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
}

.updated,
footer {
    color: var(--muted);
    font-size: 0.9rem;
}

footer {
    margin-top: 4rem;
}