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flowtwin
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>FlowTwin — Crowd Race Control</title>
<link rel="preconnect" href="">
<link rel="stylesheet" href="css/app.css">
<link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'><rect width='32' height='32' rx='6' fill='%230a0d12'/><path d='M6 22 L14 10 L18 16 L26 6' stroke='%23e10600' stroke-width='3' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>">
</head>
<body>

<header class="topbar">
  <div class="brand">
    <div class="brand-mark" aria-hidden="true"><span></span><span></span><span></span></div>
    <div class="brand-text">
      <strong>FLOWTWIN</strong>
      <span>Crowd Race Control</span>
    </div>
  </div>

  <nav class="scenario-switch" id="scenario-switch" aria-label="Scenario"></nav>

  <div class="topbar-right">
    <div class="status-chip" id="phase-chip">
      <label>Phase</label><strong id="phase-label">—</strong>
    </div>
    <div class="status-chip clock">
      <label>Event clock</label><strong id="clock">T+00:00</strong>
    </div>
    <div class="transport">
      <button class="btn-icon" id="btn-play" title="Play / pause" aria-label="Play or pause">
        <svg viewBox="0 0 16 16" class="ico-play" aria-hidden="true"><path d="M4 2.5 13 8l-9 5.5z"/></svg>
        <svg viewBox="0 0 16 16" class="ico-pause" aria-hidden="true"><path d="M4 2.5h3v11H4zM9 2.5h3v11H9z"/></svg>
      </button>
      <div class="speed-group" id="speed-group" role="group" aria-label="Simulation speed"></div>
    </div>
    <button class="btn-ghost sm" id="btn-perception" title="Hugging Face crowd perception">Perception</button>
    <div class="status-chip conn" id="conn-chip" title="Live state stream">
      <span class="dot" id="conn-dot"></span><strong id="conn-label">offline</strong>
    </div>
  </div>
</header>

<main class="layout">

  <!-- ───────────────────────── left rail ───────────────────────── -->
  <aside class="rail rail-left" id="rail-left">
    <section class="panel" id="briefing-panel">
      <header class="panel-head">
        <h2>Scenario</h2>
        <span class="tag" id="venue-kind">—</span>
      </header>
      <div class="panel-body">
        <h3 class="scenario-name" id="scenario-name">—</h3>
        <p class="scenario-headline" id="scenario-headline"></p>
        <ul class="briefing" id="briefing-list"></ul>
        <dl class="kv" id="run-config"></dl>
      </div>
    </section>

    <section class="panel" id="whatif-panel">
      <header class="panel-head">
        <h2>What-if</h2>
        <button class="btn-ghost sm" id="btn-reset-whatif">Reset</button>
      </header>
      <div class="panel-body">
        <div class="field">
          <label for="in-crowd">Attendance <output id="out-crowd"></output></label>
          <input type="range" id="in-crowd" min="5000" max="120000" step="1000">
        </div>
        <div class="field">
          <label for="in-ramp">Departure window <output id="out-ramp"></output></label>
          <input type="range" id="in-ramp" min="180" max="2400" step="60">
        </div>
        <div class="field">
          <label for="in-compliance">Reroute compliance <output id="out-compliance"></output></label>
          <input type="range" id="in-compliance" min="20" max="120" step="5">
        </div>
        <div class="field" id="capacity-field">
          <label for="in-capacity"><span id="capacity-label">Exit capacity</span> <output id="out-capacity"></output></label>
          <input type="range" id="in-capacity" min="20" max="150" step="5">
        </div>
        <div class="field">
          <label for="in-seed">Random seed</label>
          <div class="seed-row">
            <input type="number" id="in-seed" step="1">
            <button class="btn-ghost sm" id="btn-reseed" title="New seed">↻</button>
          </div>
        </div>
        <div class="field">
          <label for="in-policy">Baseline routing</label>
          <select id="in-policy">
            <option value="shortest_path">Shortest path</option>
            <option value="static_assignment">Static assignment</option>
            <option value="flowtwin_adaptive">FlowTwin adaptive</option>
          </select>
        </div>
        <button class="btn-primary block" id="btn-run">Run simulation</button>
        <p class="hint" id="whatif-hint">Every run is reproducible from its seed and configuration.</p>
      </div>
    </section>

    <section class="panel" id="timeline-panel">
      <header class="panel-head"><h2>Event timeline</h2></header>
      <div class="panel-body">
        <ol class="timeline" id="timeline-list"></ol>
      </div>
    </section>

    <section class="panel" id="provenance-panel" hidden>
      <header class="panel-head">
        <h2>Evidence &amp; assumptions</h2>
        <span class="tag warn">Reconstruction</span>
      </header>
      <div class="panel-body">
        <p class="disclaimer" id="prov-disclaimer"></p>
        <div class="prov-group">
          <h4><span class="pill fact">Documented</span></h4>
          <ul class="prov-list" id="prov-facts"></ul>
        </div>
        <div class="prov-group">
          <h4><span class="pill assume">Modelled</span></h4>
          <ul class="prov-list" id="prov-assumptions"></ul>
        </div>
      </div>
    </section>
  </aside>

  <!-- ───────────────────────── centre: the map ───────────────────────── -->
  <section class="stage">
    <div class="map-shell">
      <canvas id="map" aria-label="Venue digital twin"></canvas>

      <div class="map-overlay map-title">
        <strong id="venue-name">—</strong>
        <span id="venue-subtitle"></span>
      </div>

      <div class="map-overlay map-layers" id="layer-toggles" role="group" aria-label="Map layers"></div>

      <div class="map-overlay map-legend">
        <div class="legend-row" id="legend-density"></div>
        <div class="legend-note">Mean corridor density · p/m²</div>
      </div>

      <div class="map-overlay map-scale" id="map-scale"><span></span><label>100 m</label></div>

      <div class="tooltip" id="map-tooltip" hidden></div>

      <div class="map-flash" id="map-flash" hidden></div>
      <div class="map-empty" id="map-empty">
        <h3>No simulation running</h3>
        <p>Choose a scenario and press <strong>Run simulation</strong>.</p>
      </div>
    </div>

    <div class="metrics-strip" id="metrics-strip"></div>
  </section>

  <!-- ───────────────────────── right rail ───────────────────────── -->
  <aside class="rail rail-right">
    <section class="panel alerts-panel">
      <header class="panel-head">
        <h2>Alerts</h2>
        <span class="tag" id="alert-count">0</span>
      </header>
      <div class="panel-body tight" id="alerts-list">
        <p class="empty">Network nominal.</p>
      </div>
    </section>

    <section class="panel prediction-panel">
      <header class="panel-head">
        <h2>Prediction</h2>
        <span class="tag" id="pred-source" title="">—</span>
      </header>
      <div class="panel-body tight">
        <div id="prediction-list"></div>
        <button class="btn-ghost block sm" id="btn-pred-detail">Model accuracy</button>
      </div>
    </section>

    <section class="panel strategy-panel">
      <header class="panel-head">
        <h2>Strategy</h2>
        <span class="tag" id="strategy-state">idle</span>
      </header>
      <div class="panel-body">
        <button class="btn-primary block" id="btn-simulate">Simulate strategies</button>
        <p class="hint" id="strategy-hint">
          Clones the current crowd state, applies each candidate to an identical
          copy and simulates forward.
        </p>
        <div id="recommendation-card"></div>
      </div>
    </section>
  </aside>
</main>

<!-- ───────────────────────── strategy drawer ───────────────────────── -->
<section class="drawer" id="drawer" hidden aria-label="Strategy simulator">
  <header class="drawer-head">
    <div>
      <h2>Strategy simulator</h2>
      <p id="drawer-sub"></p>
    </div>
    <div class="drawer-actions">
      <button class="btn-ghost sm" id="btn-drawer-collapse">Hide</button>
    </div>
  </header>
  <div class="drawer-body">
    <div class="drawer-col drawer-table">
      <table class="strategy-table" id="strategy-table">
        <thead></thead>
        <tbody></tbody>
      </table>
      <p class="table-note" id="table-note"></p>
    </div>
    <div class="drawer-col drawer-why">
      <h3>Why this strategy?</h3>
      <div id="why-panel"></div>
    </div>
    <div class="drawer-col drawer-chart">
      <h3>Projected density at the bottleneck</h3>
      <canvas id="strategy-chart"></canvas>
      <div class="chart-legend" id="chart-legend"></div>
    </div>
  </div>
</section>

<!-- ───────────────────────── modal ───────────────────────── -->
<div class="modal-backdrop" id="modal" hidden>
  <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="modal-title">
    <header><h2 id="modal-title">—</h2><button class="btn-icon" id="modal-close" aria-label="Close">✕</button></header>
    <div class="modal-body" id="modal-body"></div>
  </div>
</div>

<div class="toasts" id="toasts" aria-live="polite"></div>

<script type="module" src="js/app.js"></script>
</body>
</html>