app/src/content/embeds/d3-line-quad.html

<div class="line-quad">
  
  <div class="line-quad__grid">
    <div class="quad-cell" data-title="Formatting Filter" data-csv="/data/formatting_filters.csv"></div>
    <div class="quad-cell" data-title="Relevance Filter" data-csv="/data/relevance_filters.csv"></div>
    <div class="quad-cell" data-title="Visual Dependency Filter" data-csv="/data/visual_dependency_filters.csv"></div>
    <div class="quad-cell" data-title="Image Correspondence Filter" data-csv="/data/image_correspondence_filters.csv"></div>
  </div>
  <noscript>JavaScript is required to render these charts.</noscript>

</div>
<style>
  .line-quad { position: relative; }
  /* Axis/tick/grid use global variables from _variables.css */
  /* Apply axis/tick/grid purely via CSS */
  .line-quad .axes path,
  .line-quad .axes line { stroke: var(--axis-color); }
  .line-quad .axes text { fill: var(--tick-color); }
  .line-quad .grid line { stroke: var(--grid-color); }
  .line-quad__grid { display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  @media (max-width: 980px) { .line-quad__grid { grid-template-columns: 1fr; } }

  

  .quad-cell { border:1px solid var(--border-color); border-radius:10px; background: var(--surface-bg); display:flex; flex-direction:column; position: relative; }
  /* Stacking order to ensure hover/tooltip overlays are not hidden by neighbors */
  .line-quad__grid .quad-cell:nth-child(1) { z-index: 4; } /* top-left */
  .line-quad__grid .quad-cell:nth-child(3) { z-index: 3; } /* bottom-left */
  .line-quad__grid .quad-cell:nth-child(2) { z-index: 2; } /* top-right */
  .line-quad__grid .quad-cell:nth-child(4) { z-index: 1; } /* bottom-right */
  .quad-cell .cell-header { padding:8px 10px; border-bottom:1px solid var(--border-color); display:flex; align-items:center; justify-content:space-between; gap:8px; }
  .quad-cell .cell-title { font-size: 13px; font-weight: 700; color: var(--text-color); }
  .quad-cell .cell-controls { display:flex; align-items:center; gap:12px; }
  .quad-cell .cell-controls label { font-size:12px; color: var(--muted-color); display:flex; align-items:center; gap:6px; white-space:nowrap; }
  .quad-cell select {
    font-size: 12px; padding: 6px 28px 6px 10px; border: 1px solid var(--border-color); border-radius: 8px;
    background-color: var(--surface-bg); color: var(--text-color);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%230f1115' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 8px center; background-size: 12px;
    -webkit-appearance: none; appearance: none; cursor: pointer; transition: border-color .15s ease, box-shadow .15s ease;
  }
  [data-theme="dark"] .quad-cell select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  }
  .quad-cell select:hover { border-color: var(--primary-color); }
  .quad-cell select:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(232,137,171,.25); outline: none; }
  .quad-cell .cell-body { position: relative; }
  .quad-cell .cell-body { width:100%; overflow:hidden; }
  .quad-cell .cell-body svg { max-width:100%; height:auto; }
  
  .line-quad.hovering .lines path.ghost { opacity: .25; }
  .line-quad.hovering .points circle.ghost { opacity: .25; }
  .line-quad.hovering .areas path.ghost { opacity: .08; }
  .line-quad.hovering .legend-bottom .item.ghost { opacity: .35; }
  /* Tooltip refined styling */
  .line-quad .d3-tooltip {
    z-index: 20;
    backdrop-filter: saturate(1.12) blur(8px);
  }
  .line-quad .d3-tooltip__inner {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 220px;
  }
  .line-quad .d3-tooltip__inner > div:first-child {
    font-weight: 800;
    letter-spacing: 0.1px;
    margin-bottom: 0;
  }
  .line-quad .d3-tooltip__inner > div:nth-child(2) {
    font-size: 11px;
    color: var(--muted-color);
    display: block;
    margin-top: -4px;
    margin-bottom: 2px;
    letter-spacing: 0.1px;
  }
  .line-quad .d3-tooltip__inner > div:nth-child(n+3) {
    padding-top: 6px;
    border-top: 1px solid var(--border-color);
  }
  .line-quad .d3-tooltip__inner svg {
    display: inline-block;
    vertical-align: middle;
    margin-right: 2px;
  }
  .line-quad .d3-tooltip__inner strong {
    margin-right: 6px;
  }
  .line-quad .d3-tooltip__color-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
  }
  /* Header layout (like d3-line-simple) */
  .line-quad__header {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 12px;
    margin: 8px 0 0 0;
    flex-wrap: wrap;
  }
  .line-quad__header .legend-bottom {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 12px;
    color: var(--text-color);
  }
  .line-quad__header .legend-bottom .legend-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-color);
  }
  .line-quad__header .legend-bottom .items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
  }
  .line-quad__header .legend-bottom .item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
  }
  .line-quad__header .legend-bottom .swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    display: inline-block;
  }
  .line-quad .controls {
    margin-top: 0;
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: flex-end;
    width: auto;
    flex-wrap: wrap;
  }
  .line-quad .controls .control-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .line-quad .controls label {
    font-size: 12px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    font-weight: 700;
  }
  .line-quad .controls select {
    font-size: 12px;
    padding: 8px 28px 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--surface-bg);
    color: var(--text-color);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%230f1115' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 12px;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: border-color .15s ease, box-shadow .15s ease;
  }
  [data-theme="dark"] .line-quad .controls select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  }
  .line-quad .controls select:hover { border-color: var(--primary-color); }
  .line-quad .controls select:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(232,137,171,.25); outline: none; }
</style>
<script>
  (() => {
    const THIS_SCRIPT = document.currentScript;
    // Shared run->color mapping to keep legend and series perfectly in sync
    let SHARED_RUN_COLOR = null;
    // Pretty label mapping for metric keys
    const prettyMetricLabel = (key) => {
      if (!key) return '';
      const table = {
        'ai2d_exact_match': 'AI2D Exact Match',
        'average_rank': 'Average Rank',
      };
      if (table[key]) return table[key];
      const cleaned = String(key).replace(/[_-]+/g, ' ').trim();
      return cleaned.split(/\s+/).map(w => {
        if (/^(ai2d|umap|id|auc|f1)$/i.test(w)) return w.toUpperCase();
        return w.charAt(0).toUpperCase() + w.slice(1);
      }).join(' ');
    };
    const ensureD3 = (cb) => {
      if (window.d3 && typeof window.d3.select === 'function') return cb();
      let s = document.getElementById('d3-cdn-script');
      if (!s) { s = document.createElement('script'); s.id = 'd3-cdn-script'; s.src = 'https://cdn.jsdelivr.net/npm/d3@7/dist/d3.min.js'; document.head.appendChild(s); }
      const onReady = () => { if (window.d3 && typeof window.d3.select === 'function') cb(); };
      s.addEventListener('load', onReady, { once: true }); if (window.d3) onReady();
    };

    function initRunLine(cell){
      const d3 = window.d3;
      const csvPath = cell.getAttribute('data-csv');
      const titleText = cell.getAttribute('data-title') || '';

      // Header
      const header = document.createElement('div'); header.className = 'cell-header';
      const title = document.createElement('div'); title.className = 'cell-title'; title.textContent = titleText; header.appendChild(title);
      // Per-cell controls supprimés (contrôle global utilisé)
      cell.appendChild(header);

      // Body & SVG
      const body = document.createElement('div'); body.className = 'cell-body'; cell.appendChild(body);
      const svg = d3.select(body).append('svg').attr('width','100%').style('display','block');
      const gRoot = svg.append('g');
      const gGrid = gRoot.append('g').attr('class','grid');
      const gAxes = gRoot.append('g').attr('class','axes');
      const gAreas = gRoot.append('g').attr('class','areas');
      const gLines = gRoot.append('g').attr('class','lines');
      const gPoints = gRoot.append('g').attr('class','points');
      const gHover = gRoot.append('g').attr('class','hover');
      // Removed per-cell legend; using global footer legend

      // Tooltip
      cell.style.position = cell.style.position || 'relative';
      let tip = cell.querySelector('.d3-tooltip'); let tipInner; let hideTipTimer = null;
      if (!tip) {
        tip = document.createElement('div');
        tip.className = 'd3-tooltip';
        Object.assign(tip.style, {
          position:'absolute',
          top:'0',
          left:'0',
          transform:'translate(-9999px,-9999px)',
          pointerEvents:'none',
          padding:'10px 12px',
          borderRadius:'12px',
          fontSize:'12px',
          lineHeight:'1.35',
          border:'1px solid var(--border-color)',
          background:'var(--surface-bg)',
          color:'var(--text-color)',
          boxShadow:'0 8px 32px rgba(0,0,0,.28), 0 2px 8px rgba(0,0,0,.12)',
          opacity:'0',
          transition:'opacity .12s ease',
          backdropFilter:'saturate(1.12) blur(8px)'
        });
        tipInner = document.createElement('div');
        tipInner.className = 'd3-tooltip__inner';
        tipInner.style.textAlign='left';
        tip.appendChild(tipInner);
        cell.appendChild(tip);
      } else { tipInner = tip.querySelector('.d3-tooltip__inner') || tip; }

      // State
      let metricList = []; let runList = []; let runOrder = []; const dataByMetric = new Map();
      let width = 800, height = 340; const margin = { top: 16, right: 20, bottom: 46, left: 56 };
      const xScale = d3.scaleLinear(); const yScale = d3.scaleLinear();
      const lineGen = d3.line().x(d => xScale(d.step)).y(d => yScale(d.value));
      let isRankStrictFlag = false; let isRankMetricFlag = false; let rankTickMax = 1;
      let sharedYConfig = null; // { type: 'rank_strict', maxRank } | { type: 'value', min, max }
      let axisLabelY = 'Value';
      
      // Colors and markers (match original embeds)
      const getRunColors = (n) => {
        try { if (window.ColorPalettes && typeof window.ColorPalettes.getColors === 'function') return window.ColorPalettes.getColors('categorical', n); } catch(_) {}
        const primary = getComputedStyle(document.documentElement).getPropertyValue('--primary-color').trim() || '#E889AB';
        return [primary, '#4EA5B7', '#E38A42', '#CEC0FA', ...(d3.schemeTableau10||[])].slice(0, n);
      };
      const pool = getRunColors(12);
      // Shapes supprimés: on n'utilise que la couleur
      // Ready signal for async load completion
      let readyResolve = null;
      const ready = new Promise((res)=> { readyResolve = res; });

      // Shared formatter for thousands: 5000 -> 5k, 1500 -> 1.5k (trim .0)
      const formatK = (v) => {
        const abs = Math.abs(v);
        if (abs >= 1000) {
          const n = v / 1000;
          const s = d3.format('.1f')(n);
          return (s.endsWith('.0') ? s.slice(0, -2) : s) + 'k';
        }
        return d3.format('d')(v);
      };

      function updateScales(){
        const isDark = document.documentElement.getAttribute('data-theme') === 'dark';
        const axisColor = 'var(--axis-color)';
        const tickColor = 'var(--tick-color)';
        const gridColor = 'var(--grid-color)';

        const rect = cell.getBoundingClientRect();
        width = Math.max(1, Math.round(rect && rect.width ? rect.width : (cell.clientWidth || 800)));
        height = Math.max(280, Math.round(width / 2.3));
        svg.attr('width', width).attr('height', height).attr('viewBox', `0 0 ${width} ${height}`).attr('preserveAspectRatio','xMidYMid meet');
        const innerWidth = width - margin.left - margin.right; const innerHeight = height - margin.top - margin.bottom;
        gRoot.attr('transform', `translate(${margin.left},${margin.top})`);
        xScale.range([0, innerWidth]); yScale.range([innerHeight, 0]);

        // Y ticks
        let yTicks = [];
        if (isRankStrictFlag) { const maxR = Math.max(1, Math.round(rankTickMax)); for (let v=1; v<=maxR; v+=1) yTicks.push(v); }
        else { yTicks = yScale.ticks(6); }

        // Grid
        gGrid.selectAll('*').remove();
        gGrid.selectAll('line').data(yTicks).join('line')
          .attr('x1',0).attr('x2',innerWidth).attr('y1',d=>yScale(d)).attr('y2',d=>yScale(d))
          .attr('stroke', gridColor).attr('stroke-width',1).attr('shape-rendering','crispEdges');

        // Axes
        gAxes.selectAll('*').remove();
        let xAxis = d3.axisBottom(xScale).tickSizeOuter(0); xAxis = xAxis.ticks(8);
        xAxis = xAxis.tickFormat(formatK);
        const yAxis = d3.axisLeft(yScale).tickValues(yTicks).tickSizeOuter(0).tickFormat(isRankStrictFlag ? d3.format('d') : d3.format('.2f'));
        gAxes.append('g').attr('transform', `translate(0,${innerHeight})`).call(xAxis).call(g=>{ g.selectAll('path, line').attr('stroke', axisColor); g.selectAll('text').attr('fill', tickColor).style('font-size','11px'); });
        gAxes.append('g').call(yAxis).call(g=>{ g.selectAll('path, line').attr('stroke', axisColor); g.selectAll('text').attr('fill', tickColor).style('font-size','11px'); });

        // Axis labels
        gAxes.append('text')
          .attr('class', 'x-axis-label')
          .attr('x', innerWidth / 2)
          .attr('y', innerHeight + Math.max(20, Math.min(36, margin.bottom - 10)))
          .attr('fill', 'var(--text-color)')
          .attr('text-anchor', 'middle')
          .style('font-size', '12px')
          .style('font-weight', '700')
          .text('Steps');

        gAxes.append('text')
          .attr('class', 'y-axis-label')
          .attr('transform', 'rotate(-90)')
          .attr('x', -innerHeight / 2)
          .attr('y', -Math.max(16, Math.min(28, margin.left - 8) + 10))
          .attr('fill', 'var(--text-color)')
          .attr('text-anchor', 'middle')
          .style('font-size', '12px')
          .style('font-weight', '700')
          .text(axisLabelY);

        return { innerWidth, innerHeight, tickColor };
      }

      function renderMetric(metricKey){
        const map = dataByMetric.get(metricKey) || {};
        const runs = runOrder;
        let minStep = Infinity, maxStep = -Infinity, maxVal = 0, minVal = Infinity;
        const isRank = /rank/i.test(metricKey); const isAverage = /average/i.test(metricKey); const isRankStrict = isRank && !isAverage;
        runs.forEach(r => { (map[r]||[]).forEach(pt => { const v = isRankStrict ? Math.round(pt.value) : pt.value; minStep=Math.min(minStep,pt.step); maxStep=Math.max(maxStep,pt.step); maxVal=Math.max(maxVal,v); minVal=Math.min(minVal,v); }); });
        if (!isFinite(minStep) || !isFinite(maxStep)) return;
        xScale.domain([minStep, maxStep]);
        if (sharedYConfig && sharedYConfig.type === 'rank_strict') {
          rankTickMax = Math.max(1, Math.round(sharedYConfig.maxRank||1));
          yScale.domain([rankTickMax, 1]);
          isRankStrictFlag = true;
          isRankMetricFlag = true;
        } else if (sharedYConfig && sharedYConfig.type === 'value') {
          yScale.domain([sharedYConfig.min, sharedYConfig.max]);
          isRankStrictFlag = isRankStrict;
          isRankMetricFlag = isRank;
        } else {
          if (isRank) { rankTickMax = Math.max(1, Math.round(maxVal)); yScale.domain([rankTickMax, 1]); }
          else { yScale.domain([minVal, maxVal]).nice(); }
          isRankStrictFlag = isRankStrict;
          isRankMetricFlag = isRank;
        }

        axisLabelY = isRankStrict ? 'Rank' : prettyMetricLabel(metricKey);
        const tChange = (window.d3 && d3.transition) ? d3.transition().duration(260).ease(d3.easeCubicOut) : null;
        const { innerWidth, innerHeight } = updateScales();

        const colorForRun = (run, idx) => {
          if (SHARED_RUN_COLOR && Object.prototype.hasOwnProperty.call(SHARED_RUN_COLOR, run)) return SHARED_RUN_COLOR[run];
          const j = (typeof idx === 'number' ? idx : runs.indexOf(run));
          return pool[(j >= 0 ? j : 0) % pool.length];
        };
        const series = runs.map((r, i) => ({ run:r, color: colorForRun(r, i), values:(map[r]||[]).slice().sort((a,b)=>a.step-b.step).map(pt => isRankStrict ? { step: pt.step, value: Math.round(pt.value), stderr: pt.stderr } : pt) }));

        // zones ± stderr (métriques non rank)
        gAreas.selectAll('*').remove();
        if (!isRank) {
          series.forEach((s) => {
            const withErr = s.values.filter(v => v && v.stderr != null && isFinite(v.stderr) && v.stderr > 0 && isFinite(v.value));
            if (!withErr.length) return;
            const upper = withErr.map(d => [xScale(d.step), yScale(d.value + d.stderr)]);
            const lower = withErr.slice().reverse().map(d => [xScale(d.step), yScale(d.value - d.stderr)]);
            const coords = upper.concat(lower);
            const pathData = d3.line().x(d=>d[0]).y(d=>d[1]).curve(d3.curveLinearClosed)(coords);
            gAreas.append('path')
              .attr('class','area')
              .attr('data-run', s.run)
              .attr('d', pathData)
              .attr('fill', s.color)
              .attr('opacity', 0)
              .attr('stroke', 'none')
              .transition().duration(450).ease(d3.easeCubicOut)
              .attr('opacity', 0.15);
          });
        }

        const paths = gLines.selectAll('path.run-line').data(series, d=>d.run);
        paths.enter()
          .append('path')
          .attr('class','run-line')
          .attr('data-run', d=>d.run)
          .attr('fill','none')
          .attr('stroke-width', 1)
          .attr('opacity',0)
          .attr('stroke', d=>d.color)
          .attr('d', d=>lineGen(d.values))
          .transition(tChange || undefined)
          .attr('opacity',0.9);
        paths
          .transition(tChange || undefined)
          .attr('stroke', d=>d.color)
          .attr('opacity',0.9)
          .attr('d', d=>lineGen(d.values));
        paths.exit().remove();

        // Draw light point markers at each data sample (subtle)
        const allPoints = series.flatMap(s => s.values.map(v => ({ run:s.run, color:s.color, step:v.step, value:v.value })));
        const ptsSel = gPoints.selectAll('circle.pt').data(allPoints, d=> `${d.run}-${d.step}`);
        ptsSel.enter().append('circle').attr('class','pt')
          .attr('data-run', d=>d.run)
          .attr('r', 1.5)
          .attr('fill', d=>d.color)
          .attr('fill-opacity', 0.6)
          .attr('stroke', 'none')
          .attr('cx', d=>xScale(d.step))
          .attr('cy', d=>yScale(d.value))
          .merge(ptsSel)
          .attr('fill', d=>d.color)
          .transition(tChange || undefined)
          .attr('r', 2)
          .attr('cx', d=>xScale(d.step))
          .attr('cy', d=>yScale(d.value));
        ptsSel.exit().remove();

        // No per-cell legend content (handled globally)

        // Hover
        gHover.selectAll('*').remove();
        const overlay = gHover.append('rect').attr('fill','transparent').style('cursor','crosshair').attr('x',0).attr('y',0).attr('width', innerWidth).attr('height', innerHeight);
        const hoverLine = gHover.append('line').style('stroke','var(--text-color)').attr('stroke-opacity', 0.25).attr('stroke-width',1).attr('y1',0).attr('y2',innerHeight).style('display','none');
        const stepSet = new Set(); series.forEach(s=>s.values.forEach(v=>stepSet.add(v.step))); const steps = Array.from(stepSet).sort((a,b)=>a-b);
        function onMove(ev){ if (hideTipTimer) { clearTimeout(hideTipTimer); hideTipTimer = null; } const [mx,my]=d3.pointer(ev, overlay.node()); const nearest = steps.reduce((best,s)=> Math.abs(s - xScale.invert(mx)) < Math.abs(best - xScale.invert(mx)) ? s : best, steps[0]); const xpx = xScale(nearest); hoverLine.attr('x1',xpx).attr('x2',xpx).style('display',null);
          let html = `<div><strong>${titleText}</strong></div><div><strong>step</strong> ${formatK(nearest)}</div>`;
          const entries = series.map(s=>{ const map = new Map(s.values.map(v=>[v.step, v])); const pt = map.get(nearest); return { run:s.run, color:s.color, pt }; }).filter(e => e.pt && e.pt.value!=null);
          entries.sort((a,b)=> (a.pt.value - b.pt.value));
          const fmt = (vv)=> (isRankStrictFlag? d3.format('d')(vv) : (+vv).toFixed(4));
          entries.forEach(e => {
            const err = (e.pt.stderr!=null && isFinite(e.pt.stderr) && e.pt.stderr>0) ? ` ± ${fmt(e.pt.stderr)}` : '';
            html += `<div style="display:flex;align-items:center;gap:8px;white-space:nowrap;"><span class=\"d3-tooltip__color-dot\" style=\"background:${e.color}\"></span><strong>${e.run}</strong><span style=\"margin-left:auto;text-align:right;\">${fmt(e.pt.value)}${err}</span></div>`;
          });
          tipInner.innerHTML = html; const offsetX=12, offsetY=12; tip.style.opacity='1'; tip.style.transform=`translate(${Math.round(mx+offsetX+margin.left)}px, ${Math.round(my+offsetY+margin.top)}px)`; }
        function onLeave(){ hideTipTimer = setTimeout(()=>{ tip.style.opacity='0'; tip.style.transform='translate(-9999px, -9999px)'; hoverLine.style('display','none'); }, 100); }
        overlay.on('mousemove', onMove).on('mouseleave', onLeave);
      }

      async function load(){
        try {
          const file = (csvPath || '').split('/').pop();
          const CANDIDATES = [
            csvPath,
            `/data/${file}`,
            `./assets/data/${file}`,
            `../assets/data/${file}`,
            `../../assets/data/${file}`
          ].filter(Boolean);
          let text = null;
          for (const p of CANDIDATES){
            try { const r = await fetch(p, { cache:'no-cache' }); if (r.ok) { text = await r.text(); break; } } catch(e){}
          }
          if (text == null) throw new Error(`CSV not found: ${file}`);
          const rows = d3.csvParse(text, d => ({ run:(d.run||'').trim(), step:+d.step, metric:(d.metric||'').trim(), value:+d.value, stderr: (d.stderr!=null && d.stderr!=='') ? +d.stderr : null }));
          metricList = Array.from(new Set(rows.map(r=>r.metric))).sort();
          runList = Array.from(new Set(rows.map(r=>r.run))).sort(); runOrder = runList;
          metricList.forEach(m => { const map={}; runList.forEach(r=>map[r]=[]); rows.filter(r=>r.metric===m).forEach(r=>{ if(!isNaN(r.step)&&!isNaN(r.value)) map[r.run].push({ step:r.step, value:r.value, stderr:r.stderr }); }); dataByMetric.set(m, map); });
          const preferred = metricList.find(m => m === 'ai2d_exact_match') || metricList.find(m => /average_rank/i.test(m));
          const def = preferred || metricList[0];
          renderMetric(def);
          const ro = window.ResizeObserver ? new ResizeObserver(()=>renderMetric(def)) : null; if (ro) ro.observe(cell);
          if (typeof readyResolve === 'function') readyResolve();
        } catch (e) {
          const pre = document.createElement('pre'); pre.textContent = 'CSV load error: ' + (e && e.message ? e.message : e);
          pre.style.color = 'var(--danger, #b00020)'; pre.style.fontSize = '12px'; pre.style.whiteSpace = 'pre-wrap'; cell.appendChild(pre);
          if (typeof readyResolve === 'function') readyResolve();
        }
      }
      load();
      
      return {
        ready,
        getMetrics: () => metricList.slice(),
        setMetric: (m) => { if (m) renderMetric(m); },
        getYInfo: (m) => {
          const key = m; const map = dataByMetric.get(key) || {}; const runs = runOrder;
          let maxVal = 0, minVal = Infinity; let minStep = Infinity, maxStep = -Infinity;
          const isRank = /rank/i.test(key); const isAverage = /average/i.test(key); const isRankStrict = isRank && !isAverage;
          runs.forEach(r => { (map[r]||[]).forEach(pt => { const v = isRankStrict ? Math.round(pt.value) : pt.value; minStep=Math.min(minStep,pt.step); maxStep=Math.max(maxStep,pt.step); maxVal=Math.max(maxVal,v); minVal=Math.min(minVal,v); }); });
          const rankMax = isRank ? Math.max(1, Math.round(maxVal)) : null;
          return { isRank, isRankStrict, min: maxVal === 0 && minVal === Infinity ? null : minVal, max: maxVal, rankMax };
        },
        setSharedY: (cfg) => { sharedYConfig = cfg || null; if (metricList && metricList.length) { /* re-render last metric if possible */ const current = cfg && cfg.key ? cfg.key : null; const m = current || metricList[0]; renderMetric(m); } }
      };
    }

    const bootstrap = () => {
      const scriptEl = THIS_SCRIPT;
      let host = null;
      // Build header (legend + controls) and append after grid
      const header = document.createElement('div'); header.className = 'line-quad__header';
      const legend = document.createElement('div'); legend.className = 'legend-bottom'; legend.innerHTML = '<div class="legend-title">Legend</div><div class="items"></div>';
      const controls = document.createElement('div'); controls.className = 'controls'; controls.innerHTML = '<div class="control-group"><label>Metric</label><select></select></div>';
      header.appendChild(legend);
      header.appendChild(controls);
      // Try finding within parent (fragment mount is inside parent)
      if (scriptEl && scriptEl.parentElement && scriptEl.parentElement.querySelector) {
        host = scriptEl.parentElement.querySelector('.line-quad');
      }
      // Fallback: scan previous siblings
      if (!host) {
        let sib = scriptEl && scriptEl.previousElementSibling;
        while (sib && !(sib.classList && sib.classList.contains('line-quad'))) {
          sib = sib.previousElementSibling;
        }
        host = sib || null;
      }
      // Last resort: global query
      if (!host) { host = document.querySelector('.line-quad'); }
      if (!host) return;
      if (host.dataset && host.dataset.mounted === 'true') return; if (host.dataset) host.dataset.mounted = 'true';
      const cells = host.querySelectorAll('.quad-cell'); if (!cells.length) return;
      host.appendChild(header);
      const instances = Array.from(cells).map(cell => initRunLine(cell));

      (async () => {
        // Wait for all charts to finish loading their CSVs
        await Promise.all(instances.map(i => i.ready));
        const lists = instances.map(i => i.getMetrics()).filter(a => Array.isArray(a) && a.length);
        const intersect = (arrs) => arrs.reduce((acc, cur) => acc.filter(x => cur.includes(x)));
        let metrics = lists.length ? intersect(lists) : [];
        if (!metrics.length) { metrics = lists[0] || []; }
        const def = (metrics.includes('ai2d_exact_match') ? 'ai2d_exact_match' : (metrics.find(m => /average_rank/i.test(m)) || metrics[0] || ''));

        // Wire header controls (select under "Metric" label)
        const headerEl = host.querySelector('.line-quad__header');
        if (headerEl && !headerEl.isConnected) host.appendChild(header);
        const select = (headerEl || header).querySelector('.controls select');
        if (select) {
          select.innerHTML = '';
          metrics.forEach(m => { const o=document.createElement('option'); o.value=m; o.textContent=prettyMetricLabel(m); select.appendChild(o); });
          if (def) select.value = def;
        }

        const computeAndApplySharedY = (metric) => {
          try {
            const infos = instances.map(i => i && typeof i.getYInfo === 'function' ? i.getYInfo(metric) : null).filter(Boolean);
            if (!infos.length) return;
            const anyRank = infos.some(info => info.isRank);
            if (anyRank) {
              const maxRank = Math.max(1, ...infos.map(info => Math.round(info.rankMax || 1)));
              instances.forEach(i => i && typeof i.setSharedY === 'function' && i.setSharedY({ type: 'rank_strict', maxRank, key: metric }));
            } else {
              const min = Math.min(...infos.map(info => info.min));
              const max = Math.max(...infos.map(info => info.max));
              instances.forEach(i => i && typeof i.setSharedY === 'function' && i.setSharedY({ type: 'value', min, max, key: metric }));
            }
          } catch (_) {}
        };

        const applyAll = (v) => { computeAndApplySharedY(v); instances.forEach(i => i && typeof i.setMetric === 'function' && i.setMetric(v)); };
        if (def) applyAll(def);
        if (select) select.addEventListener('change', () => applyAll(select.value));

        // Global legend (in header, colors only)
        const legendItemsHost = (headerEl || header).querySelector('.legend-bottom .items');
        if (legendItemsHost) {
          try {
            const f = '/data/formatting_filters.csv';
            const r = await fetch(f, { cache:'no-cache' });
            if (r.ok && window.d3 && window.d3.csvParse) {
              const txt = await r.text();
              const rows = window.d3.csvParse(txt);
              const runList = Array.from(new Set(rows.map(row => String(row.run||'').trim()).filter(Boolean))).sort();
              const poolLegend = (window.ColorPalettes && typeof window.ColorPalettes.getColors==='function')
                ? window.ColorPalettes.getColors('categorical', runList.length)
                : (()=>{ const primary = getComputedStyle(document.documentElement).getPropertyValue('--primary-color').trim() || '#E889AB'; return [primary, '#4EA5B7', '#E38A42', '#CEC0FA', ...((window.d3 && window.d3.schemeTableau10) ? window.d3.schemeTableau10 : ['#4e79a7','#f28e2b','#e15759','#76b7b2','#59a14f','#edc948','#b07aa1','#ff9da7','#9c755f','#bab0ab'])]; })();
              // Build shared run->color map once
              SHARED_RUN_COLOR = {};
              runList.forEach((name, i) => { SHARED_RUN_COLOR[name] = poolLegend[i % poolLegend.length]; });
              legendItemsHost.innerHTML = runList.map((name) => {
                const color = SHARED_RUN_COLOR[name];
                return `<span class="item" data-run="${name}"><span class=\"swatch\" style=\"background:${color}\"></span><span>${name}</span></span>`;
              }).join('');
              // Re-render all cells with the shared mapping to ensure perfect sync
              try {
                const currentMetric = (select && select.value) || def;
                if (currentMetric) applyAll(currentMetric);
              } catch {}
              // Legend hover ghosting across all cells
              legendItemsHost.querySelectorAll('.item').forEach(el => {
                el.addEventListener('mouseenter', () => {
                  const run = el.getAttribute('data-run'); if (!run) return;
                  host.classList.add('hovering');
                  host.querySelectorAll('.quad-cell').forEach(cell => {
                    cell.querySelectorAll('.lines path.run-line').forEach(p => p.classList.toggle('ghost', p.getAttribute('data-run') !== run));
                    cell.querySelectorAll('.points circle.pt').forEach(c => c.classList.toggle('ghost', c.getAttribute('data-run') !== run));
                    cell.querySelectorAll('.areas path.area').forEach(a => a.classList.toggle('ghost', a.getAttribute('data-run') !== run));
                  });
                  legendItemsHost.querySelectorAll('.item').forEach(it => it.classList.toggle('ghost', it.getAttribute('data-run') !== run));
                });
                el.addEventListener('mouseleave', () => {
                  host.classList.remove('hovering');
                  host.querySelectorAll('.quad-cell').forEach(cell => {
                    cell.querySelectorAll('.lines path.run-line').forEach(p => p.classList.remove('ghost'));
                    cell.querySelectorAll('.points circle.pt').forEach(c => c.classList.remove('ghost'));
                    cell.querySelectorAll('.areas path.area').forEach(a => a.classList.remove('ghost'));
                  });
                  legendItemsHost.querySelectorAll('.item').forEach(it => it.classList.remove('ghost'));
                });
              });
            }
          } catch {}
        }
      })();
    };

    if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', () => ensureD3(bootstrap), { once: true }); } else { ensureD3(bootstrap); }
  })();
</script>