:root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --accent: #58a6ff;
    --card: #161b22;
    --border: #30363d;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #ffffff;
        --fg: #1f2328;
        --muted: #59636e;
        --accent: #0969da;
        --card: #f6f8fa;
        --border: #d0d7de;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 64px 24px;
}

header {
    margin-bottom: 48px;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 32px 0 12px;
}

h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 24px 0 8px;
}

p { margin: 0 0 16px; }

.tagline {
    color: var(--muted);
    font-size: 1.05rem;
    margin: 0;
}

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

a:hover { text-decoration: underline; }

footer {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
}

footer nav {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 16px 0;
}

.muted { color: var(--muted); }

.placeholder {
    color: var(--muted);
    font-style: italic;
}

ul, ol { padding-left: 24px; }
li { margin-bottom: 6px; }