:root {
    --bg: #ffffff;
    --fg: #1c1c1e;
    --muted: #6e6e73;
    --link: #007aff;
    --rule: #e5e5ea;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --fg: #f2f2f7;
        --muted: #98989d;
        --link: #0a84ff;
        --rule: #2c2c2e;
    }
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

main {
    max-width: 700px;
    margin: 0 auto;
    padding: 64px 24px 96px;
}

h1 {
    font-size: 32px;
    line-height: 1.2;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}

h2 {
    font-size: 20px;
    margin: 40px 0 12px;
    letter-spacing: -0.005em;
}

p {
    margin: 0 0 16px;
}

a {
    color: var(--link);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul {
    padding-left: 24px;
    margin: 0 0 16px;
}

li {
    margin-bottom: 6px;
}

.subtitle {
    color: var(--muted);
    font-size: 19px;
    margin: 0 0 32px;
}

.meta {
    color: var(--muted);
    font-size: 15px;
    margin: 0 0 32px;
}

footer {
    color: var(--muted);
    font-size: 14px;
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
}