index.html

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="description" content="Notes and interactive visual explainers about machine-learning systems.">
  <title>mxinO | Notes and Visual Explainers</title>
  <style>
    :root {
      --paper: #f4f5f2;
      --surface: #ffffff;
      --ink: #18201d;
      --muted: #63706a;
      --line: #d9dfdb;
      --green: #176b52;
      --green-soft: #e6f2ed;
      --blue: #3b6984;
      --blue-soft: #e7f0f5;
      --coral: #a94f3f;
      --coral-soft: #f7e9e5;
      --gold: #8a681f;
      --gold-soft: #f5eedc;
      --shadow: 0 10px 28px rgba(24, 32, 29, 0.08);
    }

    * { box-sizing: border-box; }

    html { scroll-behavior: smooth; }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      line-height: 1.55;
    }

    a { color: inherit; }

    .shell {
      width: min(1180px, calc(100% - 40px));
      margin: 0 auto;
    }

    .masthead {
      padding: 28px 0 34px;
      border-bottom: 1px solid var(--line);
      background: var(--surface);
    }

    .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 54px;
    }

    .wordmark {
      font-size: 14px;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
    }

    .source-link {
      color: var(--muted);
      font-size: 14px;
      font-weight: 700;
      text-decoration: none;
    }

    .source-link:hover,
    .source-link:focus-visible { color: var(--green); }

    .hero {
      display: grid;
      grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.5fr);
      align-items: end;
      gap: 48px;
    }

    .eyebrow,
    .section-label,
    .topic {
      margin: 0;
      color: var(--green);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
    }

    h1 {
      max-width: 820px;
      margin: 10px 0 14px;
      font-family: Georgia, "Times New Roman", serif;
      font-size: 58px;
      font-weight: 500;
      line-height: 1.02;
      letter-spacing: 0;
    }

    .hero-copy {
      max-width: 720px;
      margin: 0;
      color: var(--muted);
      font-size: 18px;
    }

    .library-count {
      padding-left: 24px;
      border-left: 3px solid var(--green);
    }

    .library-count strong {
      display: block;
      font-family: Georgia, "Times New Roman", serif;
      font-size: 38px;
      font-weight: 500;
      line-height: 1;
    }

    .library-count span {
      display: block;
      margin-top: 8px;
      color: var(--muted);
      font-size: 14px;
    }

    main { padding: 44px 0 64px; }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 22px;
    }

    h2 {
      margin: 6px 0 0;
      font-family: Georgia, "Times New Roman", serif;
      font-size: 31px;
      font-weight: 500;
      line-height: 1.15;
      letter-spacing: 0;
    }

    .section-note {
      max-width: 410px;
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      text-align: right;
    }

    .explainer-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .explainer-card {
      position: relative;
      display: flex;
      min-width: 0;
      flex-direction: column;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: 7px;
      background: var(--surface);
      text-decoration: none;
      transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
    }

    .explainer-card:hover,
    .explainer-card:focus-visible {
      border-color: #9eaaa4;
      box-shadow: var(--shadow);
      outline: none;
      transform: translateY(-2px);
    }

    .explainer-card.featured { grid-column: span 2; }

    .preview {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      border-bottom: 1px solid var(--line);
      background: #e9ece9;
    }

    .preview img {
      display: block;
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: top center;
      transition: transform 240ms ease;
    }

    .explainer-card:hover .preview img,
    .explainer-card:focus-visible .preview img { transform: scale(1.015); }

    .card-body {
      display: flex;
      min-height: 190px;
      flex: 1;
      flex-direction: column;
      padding: 20px;
    }

    .featured .card-body { min-height: 176px; }

    .topic.blue { color: var(--blue); }
    .topic.coral { color: var(--coral); }
    .topic.gold { color: var(--gold); }

    h3 {
      margin: 7px 0 9px;
      font-family: Georgia, "Times New Roman", serif;
      font-size: 23px;
      font-weight: 600;
      line-height: 1.2;
      letter-spacing: 0;
    }

    .featured h3 { font-size: 28px; }

    .card-body p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .open-label {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: auto;
      padding-top: 20px;
      color: var(--ink);
      font-size: 13px;
      font-weight: 800;
    }

    .open-label span:last-child {
      color: var(--green);
      font-size: 18px;
      line-height: 1;
    }

    footer {
      padding: 24px 0 32px;
      border-top: 1px solid var(--line);
      color: var(--muted);
      font-size: 13px;
    }

    footer .shell {
      display: flex;
      justify-content: space-between;
      gap: 24px;
    }

    @media (max-width: 820px) {
      .shell { width: min(100% - 28px, 680px); }
      .topbar { margin-bottom: 38px; }
      .hero { grid-template-columns: 1fr; gap: 28px; }
      h1 { font-size: 44px; }
      .library-count { display: flex; align-items: center; gap: 14px; }
      .library-count span { margin: 0; }
      .section-head { display: block; }
      .section-note { margin-top: 10px; text-align: left; }
      .explainer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .explainer-card.featured { grid-column: span 2; }
    }

    @media (max-width: 560px) {
      .masthead { padding-top: 22px; }
      .topbar { align-items: flex-start; margin-bottom: 34px; }
      .source-link { max-width: 120px; text-align: right; }
      h1 { font-size: 38px; }
      .hero-copy { font-size: 16px; }
      main { padding-top: 36px; }
      .explainer-grid { grid-template-columns: 1fr; }
      .explainer-card.featured { grid-column: auto; }
      .featured h3 { font-size: 23px; }
      .card-body, .featured .card-body { min-height: 184px; }
      footer .shell { display: block; }
      footer span { display: block; margin-top: 4px; }
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .explainer-card,
      .preview img { transition: none; }
    }
  </style>
</head>
<body>
  <header class="masthead">
    <div class="shell">
      <div class="topbar">
        <div class="wordmark">mxinO</div>
        <a class="source-link" href="#explainers">Browse explainers</a>
      </div>
      <div class="hero">
        <div>
          <p class="eyebrow">Machine learning systems</p>
          <h1>mxinO</h1>
          <p class="hero-copy">Notes and visual explanations connecting research ideas, model architecture, and implementation details.</p>
        </div>
        <div class="library-count" aria-label="Seven published explainers">
          <strong>07</strong>
          <span>published visual explainers</span>
        </div>
      </div>
    </div>
  </header>

  <main id="explainers" class="shell">
    <div class="section-head">
      <div>
        <p class="section-label">Library</p>
        <h2>Visual explainers</h2>
      </div>
      <p class="section-note">Standalone, browser-based guides with diagrams, equations, and interactive controls.</p>
    </div>

    <section class="explainer-grid" aria-label="Published visual explainers">
      <a class="explainer-card featured" href="./illustrations/deepseek-v41-flash/">
        <div class="preview">
          <img src="./assets/previews/deepseek-v41-flash.png" alt="Preview of the DeepSeek-V4.1-Flash architecture explainer" width="960" height="600">
        </div>
        <div class="card-body">
          <p class="topic">Model architecture</p>
          <h3>DeepSeek-V4.1-Flash</h3>
          <p>Follow CED prefill and decode, CSA2 cache sharing, hierarchical sparse indexing, and bounded replay through the 40-layer model.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/mamba-gdn-deltanet/">
        <div class="preview">
          <img src="./assets/previews/mamba-gdn-deltanet.png" alt="Preview of the Mamba-2, GDN, GDN2, KDA, and ReplaySSM explainer" width="960" height="600">
        </div>
        <div class="card-body">
          <p class="topic gold">Sequence models</p>
          <h3>Mamba-2 to GDN2</h3>
          <p>Build from fixed-size linear memory through Mamba-2, GDN, KDA, and GDN2, then see how ReplaySSM changes decoding.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/flash-attention/">
        <div class="preview">
          <img src="./assets/previews/flash-attention.png" alt="Preview of the FlashAttention explainer" width="960" height="600">
        </div>
        <div class="card-body">
          <p class="topic blue">GPU algorithms</p>
          <h3>FlashAttention</h3>
          <p>See how tiling and online softmax reduce HBM traffic without approximating attention.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/sol-attention/">
        <div class="preview">
          <img src="./assets/previews/sol-attention.png" alt="Preview of the Sol-Attn explainer" width="960" height="600" loading="lazy">
        </div>
        <div class="card-body">
          <p class="topic coral">Attention systems</p>
          <h3>Sol-Attn</h3>
          <p>Trace sequence parallelism, communication costs, and the system design behind long-context attention.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/minimax-h3-architecture/">
        <div class="preview">
          <img src="./assets/previews/minimax-h3-architecture.png" alt="Preview of the MiniMax H3 architecture explainer" width="960" height="600" loading="lazy">
        </div>
        <div class="card-body">
          <p class="topic gold">Model architecture</p>
          <h3>MiniMax H3</h3>
          <p>Explore lightning attention, mixture-of-experts routing, and the model's hybrid recurrent structure.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/looped-world-models/">
        <div class="preview">
          <img src="./assets/previews/looped-world-models.png" alt="Preview of the Looped World Models explainer" width="960" height="600" loading="lazy">
        </div>
        <div class="card-body">
          <p class="topic blue">World models</p>
          <h3>Looped World Models</h3>
          <p>Understand iterative latent refinement, adaptive computation, and the evidence behind recurrent depth.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>

      <a class="explainer-card" href="./illustrations/blackwell-gpu-fp4/">
        <div class="preview">
          <img src="./assets/previews/blackwell-gpu-fp4.png" alt="Preview of the Blackwell GPU and FP4 explainer" width="960" height="600" loading="lazy">
        </div>
        <div class="card-body">
          <p class="topic coral">Numerical formats</p>
          <h3>Blackwell GPU and FP4</h3>
          <p>Compare low-precision formats and follow FP4 values through Blackwell tensor-core execution.</p>
          <div class="open-label"><span>Open explainer</span><span aria-hidden="true">&rarr;</span></div>
        </div>
      </a>
    </section>
  </main>

  <footer>
    <div class="shell">
      <strong>mxinO</strong>
      <span>Research mechanisms, made inspectable.</span>
    </div>
  </footer>
</body>
</html>