.missed-cases {
  display: grid;
  gap: var(--space-3);
  padding-block-start: var(--space-4);
  border-top: 2px solid var(--ink);
}

.missed-cases__heading .case-label {
  margin-block-end: var(--space-1);
}

.missed-cases__heading h2 {
  margin: 0;
}

.missed-case-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.missed-case {
  padding: var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-small);
  background: var(--surface);
}

.missed-case__number {
  margin-block-end: var(--space-1);
  color: var(--error);
  font-size: var(--text-small);
  font-weight: 850;
}

.missed-case__equation {
  margin-block-end: var(--space-3);
  font-size: clamp(1.35rem, 5vw, 1.85rem);
  font-weight: 900;
}

.missed-case dl {
  display: grid;
  gap: var(--space-1);
  margin: 0;
}

.missed-case dl > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-1);
  border-bottom: 1px solid var(--line);
}

.missed-case dt {
  color: var(--muted);
  font-weight: 750;
}

.missed-case dd {
  margin: 0;
  font-weight: 850;
  text-align: end;
}

.missed-case__correction {
  margin: var(--space-2) 0 0;
  color: var(--error);
  font-weight: 850;
}

.comparison-hint {
  display: grid;
  gap: var(--space-2);
  margin-block-start: var(--space-3);
  padding-block-start: var(--space-3);
  border-top: 1px solid var(--line-strong);
}

.comparison-hint__values {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.comparison-hint__values p {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface);
}

.comparison-hint__values span {
  color: var(--muted);
  font-size: var(--text-small);
  font-weight: 750;
}

.comparison-hint__values strong {
  color: var(--accent-strong);
  font-size: 1.2rem;
}

.stop-investigation {
  min-block-size: 44px;
  padding: 0.4rem 0.75rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: var(--text-small);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.classroom-mode-toggle,
.read-aloud-button {
  min-block-size: 44px;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font-size: var(--text-small);
  font-weight: 800;
}

.classroom-mode-toggle[aria-pressed="true"] {
  border-color: var(--accent-strong);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.read-aloud-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.read-aloud-button[aria-pressed="true"] {
  border-color: var(--accent-strong);
  background: var(--accent-soft);
  color: var(--accent-strong);
  box-shadow: 0 0 0 3px rgb(216 79 42 / 10%);
}

.stage-transition-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-inline-start: 5px solid var(--accent-strong);
  background: var(--accent-soft);
}

.stage-transition-note strong {
  color: var(--accent-strong);
}

.stage-transition-note span {
  color: var(--ink);
}

.answer-jump-button {
  display: none;
  min-block-size: 48px;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent-strong);
  cursor: pointer;
  font-size: var(--text-small);
  font-weight: 850;
}

.answer-jump-button svg {
  inline-size: 20px;
  block-size: 20px;
}

.hint-answer-jump {
  display: none;
  inline-size: 100%;
  min-block-size: 44px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-block-start: var(--space-2);
  padding: 0.35rem 0;
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  cursor: pointer;
  font-size: var(--text-small);
  font-weight: 850;
  text-align: start;
}

.hint-answer-jump svg {
  inline-size: 20px;
  block-size: 20px;
  flex: 0 0 auto;
}

#answer-options {
  scroll-margin-block-start: var(--space-3);
}

.summary-quick-action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
  border-inline-start: 5px solid var(--accent-strong);
  background: var(--accent-soft);
}

.summary-quick-action p {
  margin: 0;
  font-weight: 800;
}

.feedback .read-aloud-button {
  justify-self: start;
  margin-block-start: var(--space-2);
}

body.classroom-mode {
  font-size: 22px;
}

body.classroom-mode .main-content {
  inline-size: min(100% - 40px, 1180px);
}

body.classroom-mode .screen {
  max-inline-size: 1080px;
  margin-inline: auto;
}

body.classroom-mode .equation-expression {
  font-size: clamp(2.25rem, 5vw, 4.25rem);
}

body.classroom-mode .evidence-card {
  min-block-size: 210px;
}

body.classroom-mode .choice label,
body.classroom-mode .button {
  min-block-size: 68px;
  font-size: 1.15rem;
}

body.classroom-mode .progress-block__labels,
body.classroom-mode .answer-form legend {
  font-size: 1.1rem;
}

#stop-investigation-dialog {
  inline-size: min(calc(100% - 24px), 520px);
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 24px 80px rgb(10 25 40 / 28%);
}

#stop-investigation-dialog::backdrop {
  background: rgb(15 31 47 / 62%);
}

.stop-dialog-panel {
  padding: var(--space-4);
}

.stop-dialog-panel h1 {
  margin-block: var(--space-1) var(--space-2);
  font-size: clamp(1.65rem, 6vw, 2.3rem);
}

.stop-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-block-start: var(--space-4);
}

@media (max-width: 520px) {
  .hint-answer-jump {
    display: flex;
    margin-block-start: 0;
  }

  .hint-reminder--desktop {
    display: none;
  }

  .answer-jump-button {
    display: inline-flex;
    inline-size: 100%;
  }

  .stage-transition-note {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .summary-quick-action .button {
    inline-size: 100%;
  }

  .missed-case dl > div {
    display: grid;
    gap: 0;
  }

  .missed-case dd {
    text-align: start;
  }

  .comparison-hint__values,
  .stop-dialog-actions {
    grid-template-columns: 1fr;
  }

  .stop-dialog-actions {
    display: grid;
  }

  .stop-dialog-actions .button {
    inline-size: 100%;
  }

  .problem-heading__title-row {
    align-items: flex-end;
    flex-wrap: wrap;
  }

  .classroom-mode-toggle,
  .read-aloud-button {
    padding-inline: 0.65rem;
  }

  body.classroom-mode {
    font-size: 18px;
  }

  body.classroom-mode .main-content {
    inline-size: min(100% - 24px, var(--screen-width));
  }

  body.classroom-mode .equation-expression {
    font-size: clamp(1.35rem, 6.8vw, 1.75rem);
  }

  body.classroom-mode .evidence-card {
    min-block-size: 122px;
  }
}