:root {
            color-scheme: dark;
            --bg: #0f172a;
            --panel: #111827;
            --text: #e5e7eb;
            --muted: #94a3b8;
            --accent: #38bdf8;
            --border: #334155;
        }

        * { box-sizing: border-box }

        body {
            margin: 0;
            min-height: 100vh;
            background: radial-gradient(circle at top left, #1d4ed8 0, var(--bg) 34rem);
            color: var(--text);
            font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        }

        header, main {
            width: min(960px, calc(100% - 2rem));
            margin: auto;
        }

        header { padding: 2.5rem 0 1rem }

        h1 {
            margin: 0 0 .5rem;
            font-size: clamp(2rem, 6vw, 3.5rem);
            letter-spacing: -.04em;
        }

        .subtitle {
            margin: 0;
            color: var(--muted);
        }

        main {
            margin-bottom: 3rem;
            border: 1px solid var(--border);
            border-radius: 18px;
            background: color-mix(in srgb, var(--panel) 92%, transparent);
            box-shadow: 0 24px 70px rgb(0 0 0 / .3);
        }

        #content {
            padding: clamp(1rem, 4vw, 2rem);
            line-height: 1.75;
        }

        #content > :first-child { margin-top: 0 }
        #content > :last-child { margin-bottom: 0 }
        #content a { color: var(--accent) }
        #content img { max-width: 100% }
        #content hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0 }
        #content blockquote { margin-left: 0; padding-left: 1rem; border-left: 4px solid var(--accent); color: var(--muted) }
        #content table { width: 100%; border-collapse: collapse; overflow: auto; display: block }
        #content th, #content td { border: 1px solid var(--border); padding: .45rem .7rem }
        #content code:not([class*="language-"]) { padding: .1rem .35rem; border-radius: .3rem; background: rgb(148 163 184 / .16) }
        #content pre { padding: 1rem; overflow: auto; border-radius: .75rem; background: #020617 }
        #content pre code { background: transparent; padding: 0 }
        #content .yellow { color: #facc15 }
        #content .task-list-item { list-style: none }
        #content .task-list-item-checkbox { margin-right: .5rem }
        #content .mermaid { display: flex; justify-content: center; background: transparent }
        .error { color: #fca5a5 }

        nav.toc {
            background-color: #ccc;
            padding: 4px;
            ul li {
                list-style: none;
                a {
                    color: #444!important;
                }
            }
        }