This fitness dashboard presents three coordinated D3.js (v7) charts built from CSV data. A reusable scatter plot maps workout minutes against calories burned, with point colors encoding intensity levels. The page also includes a pie chart showing total calorie distribution by intensity and a line chart tracking daily calorie trends. The implementation uses `d3.csv()` to load data, `d3.scaleLinear` and `d3.scaleOrdinal` for scales, `d3.axisBottom` for axes, `d3.pie()` and `d3.arc()` for the pie, all rendered as SVG elements.