4 chart types — each a full page with a live preview and a hidden data table for screen readers.
BarSingle-series weekly volume, thin rounded-end bars on a recessive grid.
Line & areaTwo-series session trend, line + soft area fill under the primary series.
DonutParts-of-a-whole traffic-source split with a centered total.
Stat tilesRow of headline KPI cards with a signed delta and up/down/good/bad framing.