/* chi_square.css — the chi-square distribution + right-tail p-value (see chi_square.js).
   Reuses the shared graph kit: the curve is .lv-curve, the shaded tail .lv-area, the
   statistic drop-line .lv-drop, and the readout cards .lv-rcard — all from _shared.css.
   No type-specific classes are needed. */