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    <div class="lab-head">
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        <div class="eyebrow">A lab, not linked</div>
        <h1>Three scenes, one feed</h1>
        <p class="lead" style="margin-top:var(--s-3)">The same live devnet reply, drawn three ways. Every mark is a block the observer stored; the words are the ledger's.</p>
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      <div class="state" id="feed-state"><span class="dot off"></span>connecting to the devnet observer</div>
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    <div class="scenes" id="scenes">
      <div class="scene-card card" data-scene="a">
        <div class="head"><h3>A · Forge</h3><div class="eyebrow">embers rise</div></div>
        <canvas id="sc-a" aria-label="Forge: blocks rise as embers from the bottom and cool from molten to bone as they go from pending to included to proven; a dark band sweeps up at the lock"></canvas>
        <p>Blocks arrive as embers from the hearth, one column per miner, and cool as they go: pending molten, included ember, proven bone. A lock is the dark band sweeping up; everything under it is final.</p>
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      <div class="scene-card card" data-scene="b">
        <div class="head"><h3>B · Lattice</h3><div class="eyebrow">a slow isometric DAG</div></div>
        <canvas id="sc-b" aria-label="Lattice: an isometric DAG with parents behind children, the selected chain a lit spine, checkpoints as rings closing around it"></canvas>
        <p>Time runs left to right, each miner one step deeper, so parents stand behind their children. The selected chain is the lit spine; a checkpoint is a ring that closes around it when it locks. The camera drifts at chain speed.</p>
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        <div class="head"><h3>C · Pulse</h3><div class="eyebrow">the tip at the centre</div></div>
        <canvas id="sc-c" aria-label="Pulse: the tip at the centre, time outward in rings, each block a bead on its miner's ray, proofs filling beads, locks as a ring hardening"></canvas>
        <p>The tip is the centre and time runs outward, a ring every 30 seconds. Each miner is a ray; a block is a bead on it that drifts outward, filling when proven. A lock is a ring that hardens from dashed to solid.</p>
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      <span><i class="sw" style="border:2px solid var(--molten);border-radius:50%"></i>pending</span>
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    <p class="note">One node is read every 2 s; the window is the last 120 s. Under reduced motion each scene draws a still frame on every reply. Add <code>?only=a</code>, <code>b</code> or <code>c</code> to the address for one scene full width.</p>
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