This visualization shows the percentage of people with different sleep disorders across three stress-level bins, filtered by gender via a dropdown. The chart uses stacked bar segments colored by disorder category, with a legend that supports highlighting and filtering on hover. Built with D3 v7, it uses `d3.stack`, `d3.scaleOrdinal`, and `d3.scaleBand` with transitions on rect joins to animate updates. Data comes from a CSV of sleep health records, summarized into percentages per stress bin.