This 100% stacked bar chart explores how stress levels relate to sleep disorders, allowing viewers to filter by gender and toggle categories through an interactive legend. Built with D3 v7 and React, it bins stress scores into low, medium, and high groups, displaying the proportion of people with no disorder, insomnia, or sleep apnea. Hovering reveals exact percentages and counts, while the chart uses a sequential color palette with SVG animation for smooth transitions, sourced from the Sleep Health & Lifestyle dataset.