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<!-- Compression: log-scale dumbbell of ours vs RPNI state counts across 12 datasets -->
<div class="compression-bars"></div>
<style>
  .compression-bars { position: relative; width: 100%; min-height: 440px; }
  .compression-bars svg { display: block; width: 100%; }
  .compression-bars .tick text {
    fill: var(--text-color); font-size: 11px; opacity: 0.6;
    font-variant-numeric: tabular-nums;
  }
  .compression-bars .tick line { display: none; }
  .compression-bars .domain { stroke: var(--border-color); opacity: 0.3; }
  .compression-bars .y-axis .domain { display: none; }
  .compression-bars .axis-label {
    fill: var(--text-color); font-size: 12px; font-weight: 500;
  }
  .compression-bars .cmp-row { transition: opacity 0.15s ease; }
  .compression-bars .tooltip {
    position: absolute; top: 0; left: 0; pointer-events: none; padding: 10px 14px; border-radius: 8px;
    font-size: 12px; line-height: 1.6; border: 1px solid var(--border-color);
    background: var(--surface-bg); color: var(--text-color);
    box-shadow: 0 4px 20px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.04);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    opacity: 0; transition: opacity 0.15s ease;
    z-index: 100; max-width: 240px;
    font-variant-numeric: tabular-nums;
  }
</style>
<script>
(() => {
  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); }
    s.addEventListener('load', () => cb(), { once: true });
  };

  const bootstrap = () => {
    const container = document.querySelector('.compression-bars:not([data-mounted])');
    if (!container) return;
    container.dataset.mounted = 'true';
    const d3 = window.d3;

    const data = [
      { name: 'WebArena', ours: 25, rpni: 382, compression: 15, fitness: 1.000 },
      { name: 'ATBench', ours: 15, rpni: 899, compression: 60, fitness: 1.000 },
      { name: 'Mind2Web', ours: 8, rpni: 476, compression: 60, fitness: 1.000 },
      { name: 'Who & When', ours: 9, rpni: 971, compression: 108, fitness: 1.000 },
      { name: 'tau2-bench air', ours: 18, rpni: 6506, compression: 361, fitness: 1.000 },
      { name: 'tau2-bench ret', ours: 19, rpni: 14249, compression: 750, fitness: 1.000 },
      { name: 'SWE-smith', ours: 10, rpni: 11631, compression: 1163, fitness: 1.000 },
      { name: 'OSWorld', ours: 27, rpni: 38232, compression: 1416, fitness: 0.997 },
      { name: 'tau2-bench tel', ours: 43, rpni: 63897, compression: 1486, fitness: 1.000 },
      { name: 'SWE-agent', ours: 25, rpni: 59510, compression: 2380, fitness: 0.999 },
      { name: 'AgentNet', ours: 25, rpni: 62495, compression: 2500, fitness: 1.000 },
      { name: 'GUI-Odyssey', ours: 7, rpni: 21255, compression: 3036, fitness: 1.000 },
    ].sort((a, b) => a.compression - b.compression);

    const C_OURS = '#3d5a80';   // strong slate -- ours
    const C_RPNI = '#8fa6c4';   // light slate  -- RPNI
    const margin = { top: 36, right: 78, bottom: 44, left: 120 };

    const tip = document.createElement('div');
    tip.className = 'tooltip';
    container.appendChild(tip);

    let firstRender = true;

    function render() {
      container.querySelectorAll('svg').forEach(s => s.remove());
      const rect = container.getBoundingClientRect();
      const W = Math.max(300, Math.round(rect.width));
      const rowH = 30;
      const H = margin.top + margin.bottom + data.length * rowH;
      const w = Math.max(0, W - margin.left - margin.right);
      const h = Math.max(0, H - margin.top - margin.bottom);

      const svg = d3.select(container).insert('svg', '.tooltip')
        .attr('width', W).attr('height', H);
      const g = svg.append('g').attr('transform', `translate(${margin.left},${margin.top})`);

      const x = d3.scaleLog().domain([5, 90000]).range([0, Math.max(0, w)]).clamp(true);
      const y = d3.scaleBand().domain(data.map(d => d.name)).range([0, Math.max(0, h)]).padding(0.32);

      // decade grid lines
      const ticks = [10, 100, 1000, 10000];
      g.append('g').selectAll('line').data(ticks).enter().append('line')
        .attr('x1', d => x(d)).attr('x2', d => x(d))
        .attr('y1', -6).attr('y2', Math.max(0, h))
        .attr('stroke', 'var(--border-color)').attr('stroke-opacity', 0.25)
        .attr('stroke-dasharray', '2,4');

      // x axis
      g.append('g').attr('transform', `translate(0,${Math.max(0, h)})`)
        .call(d3.axisBottom(x).tickValues(ticks).tickFormat(d => d >= 1000 ? (d / 1000) + 'k' : d + ''))
        .call(s => s.select('.domain').attr('opacity', 0.3))
        .selectAll('.tick text').attr('opacity', 0.6);

      g.append('text').attr('class', 'axis-label')
        .attr('x', Math.max(0, w) / 2).attr('y', Math.max(0, h) + 36).attr('text-anchor', 'middle')
        .text('State count, log scale (gap = compression)');

      // y labels
      g.append('g').attr('class', 'y-axis')
        .call(d3.axisLeft(y).tickSize(0).tickPadding(10))
        .call(s => s.select('.domain').remove())
        .selectAll('.tick text').attr('font-size', '11px').attr('opacity', 0.7);

      // legend
      const leg = g.append('g').attr('transform', 'translate(0, -22)');
      leg.append('circle').attr('cx', 0).attr('cy', 0).attr('r', 5).attr('fill', C_OURS);
      leg.append('text').attr('x', 10).attr('y', 4).attr('fill', 'var(--text-color)').attr('font-size', '11px').attr('opacity', 0.75).text('Ours (FSM)');
      leg.append('circle').attr('cx', 96).attr('cy', 0).attr('r', 5).attr('fill', C_RPNI);
      leg.append('text').attr('x', 106).attr('y', 4).attr('fill', 'var(--text-color)').attr('font-size', '11px').attr('opacity', 0.75).text('RPNI');

      const rows = g.selectAll('.cmp-row').data(data).enter().append('g')
        .attr('class', 'cmp-row')
        .attr('transform', d => `translate(0, ${y(d.name) + y.bandwidth() / 2})`)
        .style('cursor', 'pointer');

      const lines = rows.append('line')
        .attr('x1', d => x(d.ours)).attr('y1', 0).attr('y2', 0)
        .attr('stroke', C_RPNI).attr('stroke-width', 2).attr('stroke-opacity', 0.5)
        .attr('stroke-linecap', 'round');

      rows.append('circle').attr('class', 'dot-rpni')
        .attr('cx', d => x(d.rpni)).attr('cy', 0).attr('r', 5).attr('fill', C_RPNI);
      rows.append('circle').attr('class', 'dot-ours')
        .attr('cx', d => x(d.ours)).attr('cy', 0).attr('r', 5).attr('fill', C_OURS);

      const ratioText = rows.append('text')
        .attr('x', d => x(d.rpni) + 9).attr('y', 4)
        .attr('fill', 'var(--text-color)').attr('font-size', '10px').attr('font-weight', 600)
        .attr('font-variant-numeric', 'tabular-nums').attr('opacity', 0.85)
        .text(d => d.compression.toLocaleString() + '×');

      if (firstRender) {
        lines.attr('x2', d => x(d.ours))
          .transition().duration(650).delay((d, i) => i * 45).ease(d3.easeCubicOut)
          .attr('x2', d => x(d.rpni));
        rows.select('.dot-rpni').attr('cx', d => x(d.ours))
          .transition().duration(650).delay((d, i) => i * 45).ease(d3.easeCubicOut)
          .attr('cx', d => x(d.rpni));
        ratioText.attr('opacity', 0)
          .transition().duration(300).delay((d, i) => i * 45 + 550).attr('opacity', 0.85);
      } else {
        lines.attr('x2', d => x(d.rpni));
      }

      rows
        .on('mouseenter', function(ev, d) {
          d3.select(this).selectAll('circle').attr('r', 6.5);
          tip.innerHTML = [
            '<strong>' + d.name + '</strong>',
            'Ours: ' + d.ours + ' states',
            'RPNI: ' + d.rpni.toLocaleString() + ' states',
            'Compression: <strong>' + d.compression.toLocaleString() + '×</strong>',
            'Fitness: ' + d.fitness.toFixed(3)
          ].join('<br/>');
          tip.style.opacity = '1';
        })
        .on('mousemove', function(ev) {
          const [mx, my] = d3.pointer(ev, container);
          const tipW = tip.offsetWidth || 180, tipH = tip.offsetHeight || 80;
          const cRect = container.getBoundingClientRect();
          let tx = mx + 14, ty = my - 14;
          if (tx + tipW > cRect.width) tx = mx - tipW - 14;
          if (ty + tipH > cRect.height) ty = my - tipH - 14;
          tip.style.transform = `translate(${tx}px, ${ty}px)`;
        })
        .on('mouseleave', function() {
          d3.select(this).selectAll('circle').attr('r', 5);
          tip.style.opacity = '0';
        });

      firstRender = false;
    }

    render();
    if (window.ResizeObserver) new ResizeObserver(() => render()).observe(container);
  };

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