This visualization shows a 100% stacked bar chart of sleep disorder prevalence across stress levels, using data from a sleep health and lifestyle dataset. The chart displays the proportion of people with no disorder, insomnia, or sleep apnea, with a gray and two blue color scheme to distinguish healthy from disordered sleep. Users can filter by gender and view only disorder categories through dropdown menus, while hovering reveals exact percentages via a tooltip. The implementation uses D3 v7 with d3.stack, d3.scaleOrdinal, and d3.axisBottom/Left to render the SVG with interactive animation.