/* =========================================================================
   Homoscedasticity and Residual Diagnostics — tool-specific styling
   -------------------------------------------------------------------------
   Shared page furniture comes from components/tool-kit.css. What is specific
   here is the two-panel chart (raw scatter above, residuals against fitted
   below) and the four small plot cards in the challenge.

   The two panels are separated by a rule and labelled in words inside the
   picture; the zero line in the residual panel is dashed and labelled; and
   the three fitted-value regions are marked by tick rules AND named in the
   paired table, so nothing is carried by colour.
   ========================================================================= */

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

/* The stage is a grid track, and a grid item's automatic minimum size is its
   min-content width: without this, a wide table inside .table-scroll widens
   the whole track and can push the pinned block past a 320px viewport. */
#hetero .interactive__stage > * {
  min-width: 0;
}

/* A visually-hidden <caption> is positioned against the nearest positioned
   ancestor, which without this is the page — adding roughly 30px of spurious
   scrollable width inside every scroller. Local fix only. */
#hetero .table-scroll,
#challenge .table-scroll {
  position: relative;
}

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

/* interactive-shell.css sets `.interactive__stage svg { max-width: 100% }` at
   a specificity a plain class cannot beat, so the cap goes on the block-level
   <figure> instead. This chart is two panels tall, so the cap is tight enough
   to keep the pinned block inside a 768px viewport. */
#hetero .chart--capped {
  max-width: 26rem;
}

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

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

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

/* -------------------------------------------------------------------------
   The two panels
   ---------------------------------------------------------------------- */

.hs__point {
  fill: var(--colour-accent);
  opacity: 0.6;
}

.hs__fit {
  stroke: var(--colour-social-critical-psychology);
  stroke-width: 2.5;
  fill: none;
}

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

/* The boundaries between the low, middle and high thirds of the fitted
   values, which the paired table reports numerically. */
.hs__region {
  stroke: var(--colour-text-muted);
  stroke-width: 1;
  stroke-dasharray: 2 4;
}

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

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

/* -------------------------------------------------------------------------
   The four plot cards in the challenge
   ---------------------------------------------------------------------- */

.plotcard {
  padding: var(--space-4);
  border: 1px solid var(--colour-border);
  border-left: 4px solid var(--colour-border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--colour-surface);
}

.plotcard__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
}

.plotcard__svg {
  max-width: 20rem;
}

.plotcard__alt {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--colour-text-muted);
  max-width: 62ch;
}

.plotcard__label {
  display: block;
  margin: var(--space-3) 0 0.3rem;
  font-weight: 600;
  font-size: var(--text-sm);
}

.plotcard select {
  width: 100%;
  max-width: 30rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.6rem;
  font: inherit;
  font-size: var(--text-sm);
  color: var(--colour-text);
  background-color: var(--colour-surface-raised);
  border: 1px solid var(--colour-border-strong);
  border-radius: var(--radius-sm);
}

@media (forced-colors: active) {
  .hs__point { fill: CanvasText; opacity: 1; }
  .hs__fit { stroke: Highlight; }
  .hs__zero { stroke: Highlight; }
  .hs__region { stroke: GrayText; }
  .hs__axis { stroke: CanvasText; }
  .hs__divide { stroke: GrayText; }
  .plotcard { border: 1px solid CanvasText; }
  .plotcard select { border: 1px solid ButtonText; }
}