Cloudlane system architecture

<!-- Original layout, SVG/CSS artwork and JavaScript © 2026 XXC Templates. MIT License.
Illustrative sample content and data; no real accounts, purchases or bookings. -->
<main>
  <header class="intro">
    <div>
      <div class="kicker">CONNECTED THINKING / DIAGRAMS</div>
      <h1>Cloudlane system architecture</h1>
      <p>
        An enterprise service diagram with clear trust boundaries, request paths and a simulated
        cache hit/miss switch.
      </p>
    </div>
  </header>
  <section class="panel">
    <svg
      id="chart"
      viewBox="0 0 700 330"
      role="img"
      aria-label="Application architecture with public and private boundaries"
    ></svg>
    <div class="toolbar">
      <button id="change">Simulate cache miss</button><span class="badge" id="mode">CACHE HIT</span>
    </div>
    <output id="status" class="status" aria-live="polite"></output>
  </section>
  <footer>Original diagram · local demonstration · no network requests</footer>
</main>

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(() => {
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  const $ = (s) => document.querySelector(s),
    $$ = (s) => [...document.querySelectorAll(s)],
    status = (t) => {
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      if (el) el.textContent = t;
    },
    clamp = (n, a, b) => Math.max(a, Math.min(b, n));
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  function table(headers, rows) {
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      head.append(th);
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    rows.forEach((row) => {
      const r = body.insertRow();
      row.forEach((v) => (r.insertCell().textContent = String(v)));
    });
  }
  function selectButtons(selector, callback) {
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      b.addEventListener("click", () => {
        $$(selector).forEach((x) => x.setAttribute("aria-pressed", String(x === b)));
        callback(b);
      }),
    );
  }

  let miss = false;
  const nodes = [
    ["Browser", 70, 155],
    ["Edge", 240, 155],
    ["API", 420, 155],
    ["Cache", 610, 85],
    ["Database", 610, 235],
  ];
  function draw() {
    const s = $("#chart");
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    s.append(
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        y: 30,
        width: 528,
        height: 277,
        rx: 17,
        fill: "none",
        stroke: "var(--line)",
        "stroke-dasharray": "6 7",
      }),
    );
    s.append(svg("text", { x: 178, y: 51 }, "PRIVATE APPLICATION NETWORK"));
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      s.append(
        svg(
          "text",
          { x, y: y + 4, "text-anchor": "middle", style: "fill:var(--text);font-weight:600" },
          name,
        ),
      );
    });
    s.append(
      svg(
        "text",
        { x: 365, y: 320, "text-anchor": "middle" },
        miss
          ? "Cache miss → query durable store → return response"
          : "Cache hit → return cached response",
      ),
    );
  }
  $("#change").addEventListener("click", () => {
    miss = !miss;
    draw();
    $("#mode").textContent = miss ? "CACHE MISS" : "CACHE HIT";
    $("#change").textContent = miss ? "Simulate cache hit" : "Simulate cache miss";
    status(
      miss
        ? "Database path activated for this simulated request."
        : "Request served from cache in this illustration.",
    );
  });
  draw();
})();