:root {
    color-scheme: light dark;
    --bg: #f7f9fc;
    --surface: #ffffff;
    --border: #e6ecf2;
    --text: #111827;
    --text-secondary: #4b5565;
    --link: #0f4fcb;
    --accent-soft: #eaf3ff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1220;
        --surface: #131c2e;
        --border: #24304a;
        --text: #f2f5f9;
        --text-secondary: #b4bfd1;
        --link: #8db8ff;
        --accent-soft: #16294a;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 1.0625rem;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

header,
main,
footer {
    max-width: 44rem;
    margin: 0 auto;
    padding: 0 1rem;
}

header {
    padding-top: 1.5rem;
}

header a {
    color: var(--text);
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
}

main {
    padding-top: 1rem;
    padding-bottom: 2rem;
}

h1 {
    font-size: 2rem;
    line-height: 1.2;
    margin: 1rem 0 0.25rem;
}

h2 {
    font-size: 1.25rem;
    line-height: 1.3;
    margin: 2rem 0 0.5rem;
}

h3 {
    font-size: 1.0625rem;
    margin: 1.5rem 0 0.25rem;
}

p,
ul {
    margin: 0 0 1rem;
}

li {
    margin-bottom: 0.375rem;
}

a {
    color: var(--link);
    overflow-wrap: anywhere;
}

.updated,
.lead {
    color: var(--text-secondary);
}

.summary {
    background: var(--accent-soft);
    border-radius: 1rem;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
}

.summary ul {
    margin: 0;
    padding-left: 1.25rem;
}

.links {
    list-style: none;
    padding: 0;
}

.links a {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 0.875rem;
    padding: 0.875rem 1rem;
    font-weight: 600;
    text-decoration: none;
}

footer {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    padding-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

footer a {
    margin-right: 1rem;
}