:root{
      --bg: #0b1020;
      --panel: rgba(255,255,255,0.06);
      --panel2: rgba(255,255,255,0.09);
      --text: rgba(255,255,255,0.92);
      --muted: rgba(255,255,255,0.70);
      --faint: rgba(255,255,255,0.52);
      --border: rgba(255,255,255,0.14);
      --shadow: 0 12px 40px rgba(0,0,0,0.35);
      --accent: #7dd3fc;
      --accent2: #a78bfa;
      --max: 940px;
      --r: 18px;
      --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }

    @media (prefers-color-scheme: light){
      :root{
        --bg: #f6f7fb;
        --panel: rgba(10,18,38,0.05);
        --panel2: rgba(10,18,38,0.07);
        --text: rgba(10,18,38,0.92);
        --muted: rgba(10,18,38,0.70);
        --faint: rgba(10,18,38,0.52);
        --border: rgba(10,18,38,0.12);
        --shadow: 0 14px 44px rgba(10,18,38,0.12);
        --accent: #0284c7;
        --accent2: #7c3aed;
      }
    }

    *{ box-sizing: border-box; }
    html,body{ height:100%; }

    body{
      margin:0;
      font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
      background:
        radial-gradient(1200px 700px at 10% 10%, rgba(125,211,252,0.20), transparent 55%),
        radial-gradient(900px 600px at 90% 15%, rgba(167,139,250,0.18), transparent 55%),
        radial-gradient(800px 500px at 40% 90%, rgba(52,211,153,0.10), transparent 55%),
        var(--bg);
      color: var(--text);
      line-height: 1.72;
    }

    a{ color: inherit; text-decoration: none; }
    a:hover{ text-decoration: underline; }

    .wrap{
      max-width: var(--max);
      margin: 0 auto;
      padding: 28px 18px 70px;
    }

    .topbar{
      display:flex;
      align-items:center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      margin-top: 6px;
      margin-bottom: 18px;
    }

    .chip{
      display:inline-flex;
      align-items:center;
      gap: 8px;
      padding: 10px 12px;
      border: 1px solid var(--border);
      background: var(--panel);
      border-radius: 999px;
      color: var(--muted);
      font-size: 14px;
      box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset;
    }
    .chip:hover{
      background: var(--panel2);
      color: var(--text);
      border-color: rgba(255,255,255,0.22);
      text-decoration: none;
    }

    .card{
      border: 1px solid var(--border);
      background: var(--panel);
      border-radius: var(--r);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero{
      padding: 22px 20px 18px;
      background: linear-gradient(135deg, rgba(125,211,252,0.14), rgba(167,139,250,0.10));
      border-bottom: 1px solid var(--border);
    }

    h1{
      margin: 0 0 10px;
      font-size: 34px;
      line-height: 1.15;
      letter-spacing: -0.02em;
    }

    .meta{
      display:flex;
      gap: 10px;
      flex-wrap: wrap;
      align-items: center;
      color: var(--muted);
      font-size: 14px;
      margin-top: 8px;
    }

    .pill{
      padding: 6px 10px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.05);
      color: var(--muted);
      font-size: 12px;
      white-space: nowrap;
    }

    .lede{
      margin: 10px 0 0;
      color: var(--muted);
      font-size: 16px;
      max-width: 78ch;
    }

    .content{
      padding: 18px 20px 8px;
    }

    h2{
      margin: 30px 0 10px;
      font-size: 16px;
      letter-spacing: 0.10em;
      text-transform: uppercase;
      color: var(--muted);
    }

    h3{
      margin: 18px 0 8px;
      font-size: 15px;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--muted);
    }

    h4{
      margin: 16px 0 8px;
      font-size: 14px;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--muted);
    }

    p{
      margin: 0 0 16px;
      font-size: 16px;
    }

    .hr{
      height: 1px;
      background: var(--border);
      margin: 24px 0;
    }

    .callout{
      margin: 16px 0 18px;
      padding: 14px 14px;
      border-left: 3px solid rgba(125,211,252,0.55);
      background: rgba(255,255,255,0.04);
      border-radius: 12px;
      color: var(--text);
    }

    .mono{
      font-family: var(--mono);
      font-size: 13.5px;
      color: var(--text);
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 12px 12px;
      overflow-x: auto;
      margin: 10px 0 16px;
      white-space: pre;
    }

    ul{
      margin: 10px 0 16px 18px;
      padding: 0;
      color: var(--text);
    }
    li{ margin: 6px 0; }

    .toc{
      margin: 18px 0 0;
      padding: 14px 14px;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.03);
      border-radius: 14px;
    }

    .tocTitle{
      margin: 0 0 10px;
      color: var(--muted);
      font-weight: 900;
      letter-spacing: 0.10em;
      text-transform: uppercase;
      font-size: 12px;
    }

    .toc a{
      display:block;
      padding: 8px 10px;
      border-radius: 10px;
      border: 1px solid transparent;
      color: var(--muted);
      font-size: 14px;
    }

    .toc a:hover{
      background: rgba(255,255,255,0.05);
      border-color: var(--border);
      color: var(--text);
      text-decoration: none;
    }

    footer{
      margin-top: 20px;
      padding: 14px 20px 18px;
      border-top: 1px solid var(--border);
      color: var(--faint);
      font-size: 13px;
      display:flex;
      justify-content: space-between;
      gap: 10px;
      flex-wrap: wrap;
    }