:root {
            color-scheme: light dark;
            --fg: #0f172a;
            --bg: #ffffff;
            --muted: #475569;
            --accent: #2563eb;
            --card: #f8fafc;
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --fg: #e2e8f0;
                --bg: #0b1220;
                --muted: #94a3b8;
                --card: #0f172a;
            }
        }

        html,
        body {
            margin: 0;
            padding: 0;
            background: var(--bg);
            color: var(--fg);
            font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, sans-serif;
        }

        .container {
            max-width: 880px;
            margin: 0 auto;
            padding: 32px 20px 64px;
        }

        header {
            margin-bottom: 24px;
        }

        h1 {
            font-size: 1.875rem;
            margin: 0 0 6px;
        }

        .meta {
            color: var(--muted);
            font-size: 0.95rem;
        }

        section {
            background: var(--card);
            border-radius: 14px;
            padding: 18px 20px;
            margin: 14px 0;
        }

        h2 {
            font-size: 1.1rem;
            margin: 0 0 10px;
        }

        h3 {
            font-size: 1.0rem;
            margin: 14px 0 8px;
        }

        a {
            color: var(--accent);
            text-decoration: underline;
        }

        ul,
        ol {
            padding-left: 20px;
        }

        .small {
            font-size: 0.95rem;
            color: var(--muted);
        }

        footer {
            margin-top: 28px;
            color: var(--muted);
            font-size: 0.95rem;
        }

        .badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 999px;
            background: #e2e8f0;
            color: #0f172a;
            font-size: 12px;
            margin-bottom: 10px;
        }

        @media (prefers-color-scheme: dark) {
            .badge {
                background: #111827;
                color: #e5e7eb;
            }
        }