/* =========================================================================
   Independent-Samples t-Test: The Null Distribution — tool-specific styling
   -------------------------------------------------------------------------
   Shared page furniture comes from components/tool-kit.css. What is specific
   here is the null distribution: the t density, the shaded tails beyond the
   observed statistic, the dashed critical rules and the faint standard normal
   drawn behind for comparison.

   The shaded tails carry a hatch as well as a fill, the observed statistic is
   a labelled rule, and the critical values are labelled dashed rules, so no
   part of the reading depends on colour.
   ========================================================================= */

#ttest .interactive__controls,
#ttest .interactive__stage {
  min-width: 0;
}

#ttest .interactive__stage > * {
  min-width: 0;
}

@media (min-width: 52em) {
  #ttest .interactive__body {
    grid-template-columns: minmax(0, 19rem) minmax(0, 1fr);
  }
}

/* The descendant part is load-bearing: interactive-shell.css sets
   `.interactive__stage svg { max-width: 100% }`, which out-specifies a bare
   attribute selector, so a cap written as `[data-null]` alone would silently
   do nothing. */
.interactive__stage [data-null] {
  max-width: 29rem;
}

#ttest .interactive__readout {
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: 0.4rem;
}

#ttest .interactive__readout div {
  padding: 0.4rem 0.5rem;
}

#ttest .interactive__readout dd {
  font-size: 1rem;
}

/* -------------------------------------------------------------------------
   The null distribution
   ---------------------------------------------------------------------- */

.nd__curve {
  fill: none;
  stroke: var(--colour-accent);
  stroke-width: 2.5;
}

/* The standard normal, drawn behind so the fatter tails of t are visible. */
.nd__normal {
  fill: none;
  stroke: var(--colour-text-muted);
  stroke-width: 1.2;
  stroke-dasharray: 3 3;
}

.nd__tail {
  fill: var(--colour-accent-soft);
}

.nd__hatch {
  stroke: var(--colour-accent);
  stroke-width: 1;
  opacity: 0.5;
}

.nd__critical {
  stroke: var(--colour-social-critical-psychology);
  stroke-width: 2;
  stroke-dasharray: 6 3;
}

.nd__observed {
  stroke: var(--colour-text);
  stroke-width: 2.5;
}

.nd__axis {
  stroke: var(--colour-border-strong);
  stroke-width: 1;
}

@media (forced-colors: active) {
  .nd__curve { stroke: CanvasText; }
  .nd__normal { stroke: GrayText; }
  .nd__tail { fill: Canvas; }
  .nd__hatch { stroke: CanvasText; opacity: 1; }
  .nd__critical { stroke: Highlight; }
  .nd__observed { stroke: CanvasText; }
  .nd__axis { stroke: CanvasText; }
}