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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>Theme Lab</title>
    <link rel="stylesheet" href="/static/styles.css" />
  </head>
  <body>
    <div class="app-shell">
      <aside class="sidebar">
        <div class="brand-row">
          <div>
            <h1>Theme Lab</h1>
            <p id="statsLine">Loading corpus...</p>
          </div>
          <button id="healthButton" class="icon-button" title="Check backend">i</button>
        </div>

        <form id="searchForm" class="search-panel">
          <label>
            <span>Search</span>
            <input id="searchInput" type="search" placeholder="composer, title, motif..." autocomplete="off" />
          </label>
          <div class="field-row">
            <label>
              <span>Composer</span>
              <input id="composerInput" type="search" placeholder="Bach" list="composerSuggestions" autocomplete="off" />
              <datalist id="composerSuggestions"></datalist>
            </label>
            <label>
              <span>Key</span>
              <select id="keyFilter">
                <option value="">Any</option>
                <option>C</option>
                <option>G</option>
                <option>D</option>
                <option>A</option>
                <option>E</option>
                <option>F</option>
                <option>Bb</option>
                <option>Eb</option>
                <option>Ab</option>
              </select>
            </label>
          </div>
          <div class="toolbar">
            <button type="submit">Search</button>
            <button id="clearSearch" type="button" class="secondary">Clear</button>
          </div>
        </form>

        <div id="themeList" class="theme-list" aria-live="polite"></div>
        <div class="pager">
          <button id="prevPage" class="secondary">Prev</button>
          <span id="pageLabel">0-0</span>
          <button id="nextPage" class="secondary">Next</button>
        </div>
      </aside>

      <main class="workspace">
        <section class="detail-pane">
          <div class="section-header">
            <div>
              <h2 id="detailTitle">Select a theme</h2>
              <p id="detailMeta">Catalog, score, playback, and exports.</p>
            </div>
            <div class="toolbar">
              <button id="playTheme" disabled>Play</button>
              <button id="stopPlayback" class="secondary">Stop</button>
            </div>
          </div>
          <div class="playback-row">
            <label>
              <span>Output</span>
              <select id="midiOutputSelect">
                <option value="">Browser audio</option>
              </select>
            </label>
            <button id="refreshMidiOutputs" type="button" class="secondary">Scan MIDI</button>
          </div>
          <div class="score-surface">
            <img id="scoreImage" alt="" />
            <div id="emptyScore" class="empty-state">No score selected</div>
          </div>
          <div class="export-row" id="themeExports"></div>
          <div id="themeDescription" class="description"></div>
        </section>

        <section class="generator-pane">
          <div class="section-header">
            <div>
              <h2>Generate</h2>
              <p id="generatorStatus">Ready</p>
            </div>
            <div class="toolbar">
              <button id="generateButton">Generate</button>
            </div>
          </div>

          <form id="generateForm" class="generator-grid">
            <label>
              <span>Engine</span>
              <select id="engineSelect">
                <option value="markov">Variable order</option>
                <option value="transformer">Transformer</option>
              </select>
            </label>
            <label class="generator-param common-param">
              <span>Samples</span>
              <input id="samplesInput" type="number" min="1" max="12" value="2" />
            </label>
            <label class="generator-param common-param">
              <span>Length</span>
              <input id="lengthInput" type="number" min="4" max="64" value="24" />
            </label>
            <label class="generator-param common-param">
              <span>Key</span>
              <select id="generateKey">
                <option>C</option>
                <option>G</option>
                <option>D</option>
                <option>A</option>
                <option>F</option>
                <option>Bb</option>
                <option>Eb</option>
                <option>Ab</option>
              </select>
            </label>
            <label class="generator-param common-param">
              <span>Seed</span>
              <input id="seedInput" type="number" min="0" value="42" />
            </label>
            <label class="generator-param common-param">
              <span>Endpoint</span>
              <input id="endpointInput" type="number" min="0" max="5" step="0.1" value="1.0" />
            </label>
            <label class="generator-param markov-param">
              <span>Order</span>
              <input id="orderInput" type="number" min="1" max="3" value="3" />
            </label>
            <label class="generator-param transformer-param">
              <span>Transformer steps</span>
              <input id="stepsInput" type="number" min="10" max="1000" value="80" />
            </label>
          </form>

          <div id="generatedList" class="generated-list"></div>
        </section>
      </main>
    </div>

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