This visualization presents two complementary charts analyzing daily sales performance data from a CSV file. The first chart displays three product lines (A, B, C) as colored multiseries lines over the first half of 2025, with gridlines and a legend. The second chart combines gray bars for advertising budget on a left axis with a black trend line for profit margin on a right axis. Both charts use SVG rendering via D3 v7, with scales including `d3.scaleBand`, `d3.scaleTime`, and `d3.scaleLinear`, smooth curves through `d3.curveMonotoneX`, and annotations highlighting maximum values.