/* Step 15: shared QuestionShell. All colours come from locked semantic tokens. */
[data-standard-activity-content][hidden] {
  display: none;
}

.question-shell[hidden] {
  display: none;
}

.question-shell {
  min-height: 0;
  height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--surface-base);
  overflow: hidden;
}

.question-shell__topline,
.question-shell__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface-subtle);
}

.question-shell__topline {
  border-bottom: 1px solid var(--divider-default);
}

.question-shell__topline-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  min-width: 0;
}

.question-shell__button--new {
  min-height: 34px;
  padding-inline: var(--space-3);
  border-color: var(--mode-accent);
  color: var(--mode-soft-text);
  background: var(--mode-soft);
}

.question-shell__footer {
  border-top: 1px solid var(--divider-default);
}

.question-shell__format {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 var(--space-2);
  border: 1px solid var(--mode-accent);
  border-radius: var(--radius-pill);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.question-shell__counter,
.question-shell__progress {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  font-variant-numeric: tabular-nums;
}

.question-shell__body {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
  gap: var(--space-5);
  padding: var(--space-5);
  overflow: auto;
  overscroll-behavior: contain;
}

.question-shell__prompt,
.question-shell__response {
  min-width: 0;
}

.question-shell__prompt {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--surface-canvas);
}

.question-shell__prompt-label {
  margin: 0;
  color: var(--mode-soft-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.question-shell__prompt h2 {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(1.22rem, 1.8vw, 1.62rem);
  font-weight: var(--weight-semibold);
  line-height: 1.38;
  letter-spacing: -0.015em;
}

.question-shell__inline-math {
  display: inline-flex;
  max-width: 100%;
  margin-inline: 0.08em;
  font-family: var(--font-math);
  font-weight: var(--weight-regular);
  letter-spacing: 0;
  vertical-align: -0.04em;
}

.question-shell__inline-math > .math-typeset__content {
  display: inline-flex;
  width: auto;
  min-width: 0;
  white-space: nowrap;
}

.question-shell__math[hidden] {
  display: none;
}

.question-shell__math {
  display: grid;
  place-items: center;
  min-height: 142px;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--surface-base);
  box-shadow: var(--shadow-raised);
  font-family: var(--font-math);
  font-size: clamp(1.65rem, 4vw, 2.8rem);
  line-height: 1.2;
  text-align: center;
}

.question-shell__response {
  display: grid;
  align-content: start;
  gap: var(--space-3);
}

.question-shell button:focus-visible,
.question-shell input:focus-visible,
.question-shell textarea:focus-visible,
.question-shell a:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.question-response-group[hidden] {
  display: none;
}

.question-response-group {
  display: grid;
  gap: var(--space-2);
}

.question-response-label,
.question-choice-group legend {
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
}

.question-response-input,
.question-response-textarea {
  width: 100%;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font: inherit;
}

.question-response-input {
  min-height: 52px;
  padding: 0 var(--space-4);
  font-family: var(--font-math);
  font-size: var(--text-lg);
}

.question-response-textarea {
  min-height: 126px;
  padding: var(--space-3) var(--space-4);
  line-height: var(--leading-normal);
  resize: vertical;
}

.question-choice-group {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.question-choice-options {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.question-option[hidden] {
  display: none;
}

.question-option {
  min-height: var(--touch-target-min);
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  cursor: pointer;
}

.question-option:hover {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
}

.question-option:has(input:checked) {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  box-shadow: inset 3px 0 0 var(--mode-accent);
}

.question-option input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--mode-accent);
}

.question-option__marker {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--surface-subtle);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.question-option__label {
  min-width: 0;
  font-family: var(--font-math);
  font-size: var(--text-md);
}

.question-shell__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.question-shell__button {
  min-height: var(--touch-target-min);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-secondary);
  font-weight: var(--weight-semibold);
  cursor: pointer;
}

.question-shell__button:hover:not(:disabled) {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-shell__button--check,
.question-shell__button--next {
  border-color: var(--mode-accent);
  background: var(--mode-accent);
  color: var(--mode-accent-text);
}

.question-shell__button--check {
  margin-left: auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

.question-shell__button--next {
  min-width: 138px;
}

.question-shell__button:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.question-shell__feedback,
.question-shell__reveal {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

.question-shell__feedback[hidden],
.question-shell__reveal[hidden] {
  display: none;
}

.question-shell__feedback[data-tone="correct"] {
  border-color: var(--feedback-correct-accent);
  background: var(--feedback-correct-soft);
  color: var(--feedback-correct-ink);
}

.question-shell__feedback[data-tone="incorrect"] {
  border-color: var(--feedback-incorrect-accent);
  background: var(--feedback-incorrect-soft);
  color: var(--feedback-incorrect-ink);
}

.question-shell__feedback[data-tone="warning"] {
  border-color: var(--feedback-warning-accent);
  background: var(--feedback-warning-soft);
  color: var(--feedback-warning-ink);
}

.question-shell__feedback[data-tone="info"] {
  border-color: var(--feedback-info-accent);
  background: var(--feedback-info-soft);
  color: var(--feedback-info-ink);
}

.question-shell__feedback-symbol {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-weight: var(--weight-bold);
}

.question-shell__feedback strong,
.question-shell__reveal strong {
  display: block;
  margin-bottom: 2px;
  font-size: var(--text-sm);
}

.question-shell__feedback p,
.question-shell__reveal p {
  margin: 0;
  color: inherit;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-shell__reveal {
  grid-template-columns: minmax(0, 1fr);
  background: var(--surface-subtle);
  color: var(--text-secondary);
}

.question-shell__solution {
  border-left: 4px solid var(--feedback-info-accent);
  background: var(--feedback-info-soft);
  color: var(--feedback-info-ink);
}

.question-shell__reveal-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.question-shell__reveal-heading > span {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
}

.question-hint-list {
  color: inherit;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  white-space: pre-line;
}

.worked-solution-steps {
  min-width: 0;
}

.equation-step-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.equation-step {
  min-width: 0;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border: 1px solid color-mix(in srgb, currentColor 16%, transparent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface-base) 82%, transparent);
}

.equation-step--result {
  border-color: var(--feedback-correct-accent);
  background: var(--feedback-correct-soft);
  color: var(--feedback-correct-ink);
}

.equation-step__number {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.equation-step__content {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.equation-step__label {
  color: inherit;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.02em;
}

.equation-step__expression {
  overflow-wrap: anywhere;
  font-family: var(--font-math);
  font-size: clamp(1.02rem, 2vw, 1.24rem);
  line-height: 1.35;
  color: inherit;
}

.equation-step__explanation {
  margin: 0;
  color: inherit;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-shell__footer-spacer {
  flex: 1 1 auto;
}

@media (max-width: 900px) {
  .question-shell__body {
    grid-template-columns: minmax(240px, 0.9fr) minmax(300px, 1.1fr);
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .question-shell__prompt {
    padding: var(--space-4);
  }
}

@media (max-width: 680px) {
  .question-shell__body {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-3);
    overflow: auto;
  }

  .question-shell__prompt {
    gap: var(--space-3);
    padding: var(--space-3);
  }

  .question-shell__prompt h2 {
    max-width: none;
    font-size: clamp(1.35rem, 6vw, 1.75rem);
  }

  .question-shell__math {
    min-height: 96px;
    font-size: clamp(1.6rem, 9vw, 2.35rem);
  }

  .question-shell__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .question-shell__button--check {
    grid-column: 1 / -1;
    margin-left: 0;
  }

  .question-shell__footer {
    padding: var(--space-2) var(--space-3);
  }

  .question-shell__button--next {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .question-shell * {
    scroll-behavior: auto;
  }
}

/* Shared AO1-AO3 end-of-set decision screen. */
.question-set-summary {
  grid-row: 1 / -1;
  min-height: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr);
  grid-template-areas:
    "heading score"
    "detail score"
    "actions actions";
  gap: var(--space-4) var(--space-6);
  align-content: center;
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  background: var(--surface-canvas);
}

.question-set-summary[hidden] { display: none; }

.question-set-summary__heading {
  grid-area: heading;
  align-self: end;
}

.question-set-summary__heading .eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--mode-soft-text);
}

.question-set-summary__heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3.2vw, 2.55rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.question-set-summary__heading p:last-child,
.question-set-summary__detail {
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

.question-set-summary__heading p:last-child {
  margin: var(--space-2) 0 0;
}

.question-set-summary__score-card {
  grid-area: score;
  min-height: 180px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-1);
  padding: var(--space-5);
  border: 2px solid var(--mode-accent);
  border-radius: var(--radius-xl);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
  text-align: center;
  box-shadow: var(--shadow-raised);
}

.question-set-summary__score-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

.question-set-summary__score {
  font-size: clamp(2.5rem, 6vw, 4.6rem);
  line-height: 1;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}

.question-set-summary__percentage {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  font-variant-numeric: tabular-nums;
}

.question-set-summary__detail {
  grid-area: detail;
  margin: 0;
  align-self: start;
}

.question-set-summary__actions {
  grid-area: actions;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  padding-top: var(--space-2);
}

.question-set-summary__action {
  min-height: 58px;
  padding: var(--space-3) var(--space-4);
  font-weight: var(--weight-semibold);
}

.question-set-summary__action--primary {
  border-color: var(--mode-accent);
  background: var(--mode-accent);
  color: var(--mode-accent-text);
}

.question-set-summary__action--primary:hover {
  box-shadow: var(--shadow-raised);
}

@media (max-width: 680px) {
  .question-set-summary {
    grid-template-columns: 1fr;
    grid-template-areas:
      "heading"
      "score"
      "detail"
      "actions";
    align-content: start;
    padding: var(--space-4);
  }

  .question-set-summary__score-card { min-height: 130px; }
  .question-set-summary__actions { grid-template-columns: 1fr; }
}

/* Step 21: diagnostic next-step support. Uses existing universal information tokens. */
.question-shell__diagnostic {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border: 1px solid var(--feedback-info-accent);
  border-radius: var(--radius-md);
  background: var(--feedback-info-soft);
  color: var(--feedback-info-ink);
}

.question-shell__diagnostic[hidden] {
  display: none;
}

.question-shell__diagnostic-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-weight: var(--weight-bold);
}

.question-shell__diagnostic-body {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.question-shell__diagnostic-kind {
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.question-shell__diagnostic strong {
  font-size: var(--text-sm);
}

.question-shell__diagnostic p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-shell__diagnostic-link {
  width: fit-content;
  min-height: var(--touch-target-min);
  display: inline-flex;
  align-items: center;
  margin-top: var(--space-1);
  padding: 0 var(--space-3);
  border: 1px solid currentColor;
  border-radius: var(--radius-md);
  color: inherit;
  font-weight: var(--weight-semibold);
  text-decoration: none;
}

.question-shell__diagnostic-link:hover {
  background: var(--surface-base);
}

.question-shell__diagnostic-link:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

@media (max-width: 680px) {
  .question-shell__diagnostic-link {
    width: 100%;
    justify-content: center;
  }
}

/* Step 35: optional shared visual surface for generated questions. */
.question-shell__visual[hidden] { display: none; }
.question-shell__visual { min-width: 0; }
.question-graph-match { display: grid; gap: var(--space-3); }
.question-graph-match__candidates { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2); }
.question-graph-card { min-width: 0; display: grid; gap: var(--space-1); padding: var(--space-2); border: 1px solid var(--border-default); border-radius: var(--radius-md); background: var(--surface-base); }
.question-graph-card__title { margin: 0; color: var(--text-secondary); font-size: var(--text-xs); font-weight: var(--weight-bold); }
.question-graph-card__plot { min-width: 0; min-height: 150px; }
@media (max-width: 720px) { .question-graph-match__candidates { grid-template-columns: 1fr; } }


/* Answer-entry pass: readable maths input plus honest AO3 self-review. */
.question-math-entry {
  display: grid;
  gap: var(--space-2);
}

.question-math-entry__field {
  min-width: 0;
}

.question-math-entry__preview-wrap,
.question-math-entry__toolbar-wrap {
  display: grid;
  gap: var(--space-1);
}

.question-math-entry__preview-label,
.question-math-entry__toolbar-label {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.question-math-entry__preview {
  min-height: 58px;
  width: 100%;
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-canvas);
  color: var(--text-primary);
  font-family: var(--font-math);
  font-size: clamp(1.05rem, 2.3vw, 1.4rem);
  overflow-x: auto;
}

.question-math-entry__preview[data-empty="true"] {
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-style: italic;
}

.question-math-entry__toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.question-math-entry__key {
  min-height: 38px;
  min-width: 44px;
  padding: 0 var(--space-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--surface-base);
  color: var(--text-primary);
  font-family: var(--font-math);
  font-size: var(--text-sm);
  cursor: pointer;
}

.question-math-entry__key:hover,
.question-math-entry__key:focus-visible {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
}

.question-math-entry__hint {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.question-self-review {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--feedback-info-accent);
  border-radius: var(--radius-lg);
  background: var(--feedback-info-soft);
  color: var(--feedback-info-ink);
}

.question-self-review[hidden] {
  display: none;
}

.question-self-review__eyebrow {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.question-self-review h3 {
  margin: 0;
  color: inherit;
  font-size: var(--text-lg);
}

.question-self-review__intro,
.question-self-review__note {
  margin: 0;
  color: inherit;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-self-review__subheading {
  font-size: var(--text-sm);
}

.question-self-review__criteria {
  display: grid;
  gap: var(--space-2);
}

.question-self-review__criterion,
.question-self-review__focus-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
}

.question-self-review__criterion {
  padding: var(--space-2) var(--space-3);
  border: 1px solid color-mix(in srgb, currentColor 20%, transparent);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-self-review input {
  width: 18px;
  height: 18px;
  margin: 1px 0 0;
  accent-color: var(--mode-accent);
}

.question-self-review__focus {
  min-width: 0;
  margin: 0;
  padding: var(--space-3);
  border: 1px solid color-mix(in srgb, currentColor 20%, transparent);
  border-radius: var(--radius-md);
}

.question-self-review__focus legend {
  padding: 0 var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
}

.question-self-review__focus-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.question-self-review__focus-option {
  grid-template-columns: auto auto;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--surface-base);
  color: var(--text-primary);
  font-size: var(--text-xs);
}

.question-self-review__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-2);
}

.question-self-review__actions .question-shell__button--check {
  margin-left: 0;
}

.question-self-review[data-outcome="secure"] {
  border-color: var(--feedback-correct-accent);
  background: var(--feedback-correct-soft);
  color: var(--feedback-correct-ink);
}

.question-self-review[data-outcome="needs-review"] {
  border-color: var(--feedback-warning-accent);
  background: var(--feedback-warning-soft);
  color: var(--feedback-warning-ink);
}

@media (max-width: 680px) {
  .question-math-entry__toolbar {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: var(--space-1);
  }

  .question-math-entry__key {
    flex: 0 0 auto;
  }

  .question-self-review {
    padding: var(--space-3);
  }

  .question-self-review__actions {
    display: grid;
    grid-template-columns: 1fr;
  }
}


/* Manual audit 2026-09-28: compact single-screen AO practice workspace. */
.question-shell__topline {
  padding: var(--space-2) var(--space-3);
}

.question-shell__topline-actions {
  gap: var(--space-2);
}

.question-shell__footer {
  justify-content: flex-end;
  padding: var(--space-2) var(--space-3);
}

.question-shell__button--next {
  min-height: 40px;
}

.question-math-entry {
  gap: var(--space-1);
}

.question-math-entry__preview-wrap,
.question-math-entry__toolbar-wrap {
  gap: 4px;
}

.question-math-entry__preview {
  min-height: 48px;
  padding: var(--space-1) var(--space-2);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
}

.question-math-entry__toolbar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.question-math-entry__toolbar {
  display: grid;
  gap: var(--space-1);
}

.question-math-entry__keys {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.question-math-entry__keys--extra {
  padding-top: var(--space-1);
  border-top: 1px solid var(--divider-default);
}

.question-math-entry__keys--extra[hidden] {
  display: none;
}

.question-math-entry__more {
  min-height: 30px;
  padding: 0 var(--space-2);
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--surface-subtle);
  color: var(--text-secondary);
  font: inherit;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  cursor: pointer;
}

.question-math-entry__more:hover,
.question-math-entry__more:focus-visible {
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-math-entry__key {
  min-height: 34px;
  min-width: 40px;
  padding: 0 var(--space-2);
}

.question-math-entry__hint {
  line-height: var(--leading-snug);
}

@media (min-width: 681px) {
  .question-shell[data-question-response-type="algebraic"] .question-shell__body {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: var(--space-3);
    padding: var(--space-3);
    overflow: hidden;
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__prompt {
    min-height: 0;
    gap: var(--space-3);
    padding: var(--space-3);
    overflow: auto;
    overscroll-behavior: contain;
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__math {
    min-height: 104px;
    padding: var(--space-3);
    font-size: clamp(1.45rem, 3vw, 2.35rem);
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__response {
    min-height: 0;
    gap: var(--space-2);
    padding-right: 2px;
    overflow: auto;
    overscroll-behavior: contain;
  }

  .question-shell[data-question-response-type="algebraic"] .question-response-input {
    min-height: 46px;
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__actions {
    gap: var(--space-1);
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__button--check {
    padding-inline: var(--space-4);
  }
}

@media (max-width: 680px) {
  .question-shell[data-question-response-type="algebraic"] .question-shell__body {
    overflow: auto;
  }

  .question-math-entry__keys {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .question-math-entry__key {
    flex: 0 0 auto;
  }
}

/* Interactive assessment pass: large, accessible visual targets for calculus reasoning. */
.question-graph-interaction {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--surface-subtle);
}

.question-graph-interaction__intro {
  display: grid;
  gap: var(--space-1);
}

.question-graph-interaction__title {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--text-base);
}

.question-graph-interaction__instruction,
.question-graph-interaction__status {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.question-graph-interaction__status {
  min-height: 1.5em;
  font-weight: var(--weight-semibold);
}

.question-graph-interaction__graph {
  min-width: 0;
}

.question-graph-interaction__graph > .question-graph-card {
  padding: var(--space-2);
}

.question-interval-selector {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: var(--space-2);
}

.question-interval-selector__segment,
.question-point-classifier__choice {
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.question-interval-selector__segment {
  display: grid;
  gap: 2px;
  align-content: center;
}

.question-interval-selector__segment:hover,
.question-interval-selector__segment:focus-visible,
.question-point-classifier__choice:hover,
.question-point-classifier__choice:focus-visible {
  border-color: var(--mode-accent);
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-width) color-mix(in srgb, var(--mode-accent) 22%, transparent);
}

.question-interval-selector__segment[aria-pressed="true"],
.question-point-classifier__choice[aria-pressed="true"] {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-interval-selector__segment-label {
  font-family: var(--font-math);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
}

.question-interval-selector__segment-cue {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.question-interval-selector__region {
  pointer-events: none;
  transition: opacity 120ms ease;
}

.question-point-classifier__choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-2);
}

.question-point-classifier__choice[hidden] {
  display: none;
}

.question-graph-interaction [data-selected="true"].diagram-primitives__point {
  stroke-width: 8;
}

@media (max-width: 680px) {
  .question-graph-interaction {
    padding: var(--space-2);
  }

  .question-interval-selector,
  .question-point-classifier__choices {
    grid-template-columns: 1fr;
  }

  .question-interval-selector__segment,
  .question-point-classifier__choice {
    min-height: 56px;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .question-interval-selector__region {
    transition: none;
  }
}


/* Step 7 prompt-audit pass: graph-first increasing/decreasing classifier. */
.question-graph-classifier__grid {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--space-2);
}
.question-graph-classifier__card {
  min-width:0;
  display:grid;
  gap:var(--space-1);
  padding:var(--space-2);
  border:2px solid var(--border-default);
  border-radius:var(--radius-md);
  background:var(--surface-base);
  color:var(--text-primary);
  font:inherit;
  text-align:left;
  cursor:pointer;
}
.question-graph-classifier__card:hover,
.question-graph-classifier__card:focus-visible,
.question-graph-classifier__sign-choice:hover,
.question-graph-classifier__sign-choice:focus-visible {
  border-color:var(--mode-accent);
  outline:none;
  box-shadow:0 0 0 var(--focus-ring-width) color-mix(in srgb,var(--mode-accent) 22%,transparent);
}
.question-graph-classifier__card[aria-pressed="true"],
.question-graph-classifier__sign-choice[aria-pressed="true"] {
  border-color:var(--mode-accent);
  background:var(--mode-soft);
  color:var(--mode-soft-text);
}
.question-graph-classifier__label {
  font-weight:var(--weight-bold);
}
.question-graph-classifier__plot {
  display:block;
  min-width:0;
  min-height:180px;
  pointer-events:none;
}
.question-graph-classifier__cue {
  color:var(--text-muted);
  font-size:var(--text-xs);
  font-family:var(--font-math);
}
.question-graph-classifier__stage-two {
  display:grid;
  gap:var(--space-2);
  padding-top:var(--space-3);
  border-top:1px solid var(--border-default);
}
.question-graph-classifier__stage-two[hidden] { display:none; }
.question-graph-classifier__stage-title {
  margin:0;
  font-size:var(--text-base);
}
.question-graph-classifier__sign-choices {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--space-2);
}
.question-graph-classifier__sign-choice {
  min-height:52px;
  padding:var(--space-2) var(--space-3);
  border:2px solid var(--border-default);
  border-radius:var(--radius-md);
  background:var(--surface-base);
  color:var(--text-primary);
  font:inherit;
  font-family:var(--font-math);
  cursor:pointer;
}
@media (max-width:680px) {
  .question-graph-classifier__grid,
  .question-graph-classifier__sign-choices {
    grid-template-columns:1fr;
  }
  .question-graph-classifier__card,
  .question-graph-classifier__sign-choice {
    min-height:56px;
  }
}

/* Area-question interaction batch: large graph regions and split-point controls. */
.question-region-selector__choices,
.question-split-selector__choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: var(--space-2);
}

.question-region-selector__choice,
.question-split-selector__choice {
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font: inherit;
  cursor: pointer;
}

.question-region-selector__choice {
  display: grid;
  gap: 2px;
  align-content: center;
  text-align: center;
}

.question-region-selector__label {
  font-family: var(--font-math);
  font-weight: var(--weight-bold);
}

.question-region-selector__cue {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.question-region-selector__choice:hover,
.question-region-selector__choice:focus-visible,
.question-split-selector__choice:hover,
.question-split-selector__choice:focus-visible {
  border-color: var(--mode-accent);
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-width) color-mix(in srgb, var(--mode-accent) 22%, transparent);
}

.question-region-selector__choice[aria-pressed="true"],
.question-split-selector__choice[aria-pressed="true"] {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-region-selector__region {
  vector-effect: non-scaling-stroke;
  transition: opacity 120ms ease, stroke-width 120ms ease;
}

.question-region-selector__region:focus-visible,
.question-region-selector__region[data-selected="true"] {
  outline: none;
  stroke-width: 5;
}

.question-split-selector__hit {
  pointer-events: all;
}

.question-graph-interaction--regions .question-graph-card__plot,
.question-graph-interaction--splits .question-graph-card__plot {
  min-height: 230px;
}

@media (max-width: 680px) {
  .question-region-selector__choices,
  .question-split-selector__choices {
    grid-template-columns: 1fr;
  }

  .question-region-selector__choice,
  .question-split-selector__choice {
    min-height: 56px;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .question-region-selector__region {
    transition: none;
  }
}


/* Parametric and trapezium bespoke question batch. */
.question-parametric-selector__choices,
.question-parametric-direction__choices,
.question-trapezium-selector__choices,
.question-trapezium-bound__choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: var(--space-2);
}

.question-parametric-selector__choice,
.question-parametric-direction__choice,
.question-trapezium-selector__choice,
.question-trapezium-bound__choice {
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font: inherit;
  cursor: pointer;
}

.question-parametric-selector__choice,
.question-parametric-direction__choice,
.question-trapezium-bound__choice {
  display: grid;
  gap: 2px;
  align-content: center;
  text-align: center;
}

.question-parametric-selector__label,
.question-parametric-direction__label,
.question-trapezium-bound__label {
  font-family: var(--font-math);
  font-weight: var(--weight-bold);
}

.question-parametric-selector__cue,
.question-parametric-direction__cue,
.question-trapezium-bound__cue {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.question-parametric-selector__choice:hover,
.question-parametric-selector__choice:focus-visible,
.question-parametric-direction__choice:hover,
.question-parametric-direction__choice:focus-visible,
.question-trapezium-selector__choice:hover,
.question-trapezium-selector__choice:focus-visible,
.question-trapezium-bound__choice:hover,
.question-trapezium-bound__choice:focus-visible {
  border-color: var(--mode-accent);
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-width) color-mix(in srgb, var(--mode-accent) 22%, transparent);
}

.question-parametric-selector__choice[aria-pressed="true"],
.question-parametric-direction__choice[aria-pressed="true"],
.question-trapezium-selector__choice[aria-pressed="true"],
.question-trapezium-bound__choice[aria-pressed="true"] {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-parametric-selector__hit,
.question-trapezium-selector__hit {
  pointer-events: all;
}

.question-graph-interaction--parametric .question-graph-card__plot,
.question-graph-interaction--parametric-direction .question-graph-card__plot,
.question-graph-interaction--trapezium .question-graph-card__plot,
.question-graph-interaction--trapezium-bound .question-graph-card__plot {
  min-height: 235px;
}

@media (max-width: 680px) {
  .question-parametric-selector__choices,
  .question-parametric-direction__choices,
  .question-trapezium-selector__choices,
  .question-trapezium-bound__choices {
    grid-template-columns: 1fr;
  }

  .question-parametric-selector__choice,
  .question-parametric-direction__choice,
  .question-trapezium-selector__choice,
  .question-trapezium-bound__choice {
    min-height: 56px;
    text-align: left;
  }
}


/* Bespoke interaction batch 4: rate flow, implicit terms, Riemann components, lines and solution curves. */
.question-rate-flow-workspace__flow {
  min-width: 0;
}

.question-rate-flow-workspace .rate-flow__actions,
.question-rate-flow-workspace .rate-flow__feedback {
  display: none;
}

.question-rate-flow-workspace .rate-flow__workspace {
  margin-top: var(--space-2);
}

.question-expression-selector__equation {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
}

.question-expression-selector__term,
.question-riemann-selector__choice,
.question-line-selector__choice,
.question-solution-curve-selector__choice {
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-base);
  color: var(--text-primary);
  font: inherit;
  cursor: pointer;
}

.question-expression-selector__term {
  min-width: 88px;
  font-family: var(--font-math);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}

.question-expression-selector__separator {
  color: var(--text-secondary);
  font-family: var(--font-math);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
}

.question-riemann-selector__choices,
.question-line-selector__choices,
.question-solution-curve-selector__choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-2);
}

.question-riemann-selector__choice {
  font-family: var(--font-math);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
}

.question-expression-selector__term:hover,
.question-expression-selector__term:focus-visible,
.question-riemann-selector__choice:hover,
.question-riemann-selector__choice:focus-visible,
.question-line-selector__choice:hover,
.question-line-selector__choice:focus-visible,
.question-solution-curve-selector__choice:hover,
.question-solution-curve-selector__choice:focus-visible {
  border-color: var(--mode-accent);
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-width) color-mix(in srgb, var(--mode-accent) 22%, transparent);
}

.question-expression-selector__term[aria-pressed="true"],
.question-riemann-selector__choice[aria-pressed="true"],
.question-line-selector__choice[aria-pressed="true"],
.question-solution-curve-selector__choice[aria-pressed="true"] {
  border-color: var(--mode-accent);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
}

.question-riemann-selector .question-graph-card__plot,
.question-line-selector .question-graph-card__plot,
.question-solution-curve-selector .question-graph-card__plot {
  min-height: 245px;
}

@media (max-width: 760px) {
  .question-rate-flow-workspace .rate-flow__workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .question-expression-selector__equation {
    justify-content: flex-start;
  }

  .question-riemann-selector__choices,
  .question-line-selector__choices,
  .question-solution-curve-selector__choices {
    grid-template-columns: 1fr;
  }

  .question-expression-selector__term,
  .question-riemann-selector__choice,
  .question-line-selector__choice,
  .question-solution-curve-selector__choice {
    min-height: 56px;
    text-align: left;
  }
}

/* AO2 reasoning pass: preserve normal prose while giving students a live
   formatted view of derivative, fraction and index notation in explanations. */
.question-reasoning-preview-wrap {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
}

.question-reasoning-preview-wrap[hidden] {
  display: none;
}

.question-reasoning-preview__label {
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.question-reasoning-preview {
  min-width: 0;
  color: var(--text-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}



/* Manual audit correction 2026-09-28: guarantee the compact AO workspace rules win. */
.question-math-entry__keys--extra[hidden] {
  display: none !important;
}

.question-shell__footer {
  min-height: 48px;
}

@media (min-width: 681px) {
  .question-shell[data-question-response-type="algebraic"] .question-shell__body {
    display: grid !important;
    grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr) !important;
    align-items: stretch;
    min-height: 0;
  }

  .question-shell[data-question-response-type="algebraic"] .question-shell__prompt,
  .question-shell[data-question-response-type="algebraic"] .question-shell__response {
    min-height: 0;
  }

  .question-shell[data-question-response-type="algebraic"] .question-math-entry__toolbar-wrap {
    align-content: start;
  }

  .question-shell[data-question-response-type="algebraic"] .question-math-entry__keys--primary {
    flex-wrap: wrap;
  }
}