/* Quiz — shared visual language for the single-question-at-a-time quiz flow,
   used by both the per-lesson quiz panel and the /quiz page. The
   question/choice/feedback/results markup is generated at runtime by
   /assets/js/quiz-engine.js, so these selectors are matched against
   script-built DOM as well as the static markup. Loaded only where a quiz
   actually appears (/quiz and the lesson pages). */

.quiz {
  padding: var(--space-32);
}
/* This panel isn't a link, so the shared .card hover-lift doesn't apply here. */
.quiz.card:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}
/* The quiz flow is deliberately excluded from the softened-outline card
   redesign: its surfaces keep the standard border strength. */
.quiz.card, .quiz-picker.card {
  border-color: var(--color-border);
}

.quiz-fallback {
  color: var(--color-text-muted);
}

.quiz-pool-note {
  color: var(--color-text-muted);
  margin-bottom: var(--space-16);
}

.quiz-progress {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  margin-bottom: var(--space-24);
  color: var(--color-text-muted);
  font-size: var(--text-small);
}

.quiz-prev {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: var(--space-4) 0;
  color: var(--color-text-muted);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  transition: color var(--transition-base);
}
.quiz-prev:hover {
  color: var(--color-primary);
}

.quiz-progress-track {
  flex-grow: 1;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  overflow: hidden;
}

/* No width transition here: the quiz engine re-renders this element from
   scratch on every question (mount.innerHTML), so a transition would never
   fire — the fresh element simply appears at its new width. */
.quiz-progress-bar {
  display: block;
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
}

.quiz-fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.quiz-question {
  padding: 0;
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading-medium);
  font-size: var(--text-h4);
  color: var(--color-text);
  margin-bottom: var(--space-24);
}

.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  list-style: none;
  padding: 0;
  margin: 0;
}

.quiz-choice {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  width: 100%;
  text-align: left;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
.quiz-choice:hover:not(:disabled) {
  border-color: var(--color-primary);
}
.quiz-choice:disabled:not(.is-correct):not(.is-incorrect):not(.is-selected) {
  opacity: 0.6;
}
.quiz-choice.is-correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
  font-weight: var(--font-weight-body-medium);
}
.quiz-choice.is-incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg);
  color: var(--color-error);
  font-weight: var(--font-weight-body-medium);
}
.quiz-choice.is-selected {
  border-color: var(--color-text);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: var(--font-weight-body-medium);
  box-shadow: var(--shadow-sm);
}

.quiz-choice-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
}
.quiz-choice.is-correct .quiz-choice-marker {
  border-color: var(--color-success);
  background: var(--color-success);
  color: var(--color-on-success);
}
.quiz-choice.is-incorrect .quiz-choice-marker {
  border-color: var(--color-error);
  background: var(--color-error);
  color: var(--color-on-error);
}
.quiz-choice.is-selected .quiz-choice-marker {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-bg);
}

.quiz-feedback {
  margin-top: var(--space-16);
  padding: var(--space-16);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-small);
  line-height: var(--leading-body);
}
.quiz-feedback strong {
  display: block;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-12);
  margin-top: var(--space-24);
}

.quiz-results {
  text-align: center;
}
.quiz-results--animated {
  animation: quiz-results-enter var(--transition-slow) var(--ease-standard) both;
}
.quiz-results h3 {
  font-size: var(--text-h4);
}

/* Small leaf mark (echoes the brand mark) that greets a finished quiz. */
.quiz-complete-icon {
  display: block;
  margin: 0 auto var(--space-8);
}
.quiz-complete-icon--animated {
  animation: quiz-icon-enter 400ms var(--ease-emphasized) both;
}

@keyframes quiz-results-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes quiz-icon-enter {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

/* Belt-and-suspenders: quiz-engine.ts already checks matchMedia before adding the
   `--animated` modifier classes, but every animation gets an explicit reduced-motion
   fallback here too rather than relying solely on the blanket rule in global.css. */
@media (prefers-reduced-motion: reduce) {
  .quiz-results--animated,
  .quiz-complete-icon--animated {
    animation: none;
  }
}
.quiz-score {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  margin-block: var(--space-16);
  color: var(--color-primary);
}
.quiz-score-percent {
  font-family: var(--font-body);
  font-size: var(--text-h4);
  color: var(--color-text-muted);
}
.quiz-time-taken {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
}

.quiz-breakdown-heading {
  margin-top: var(--space-32);
  margin-bottom: var(--space-16);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.quiz-topic-breakdown {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 32rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  text-align: left;
}
.quiz-topic-breakdown li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}
.quiz-topic-name {
  color: var(--color-text);
  font-weight: var(--font-weight-body-medium);
}
.quiz-topic-score {
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.quiz-results-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-12);
  margin-top: var(--space-48);
}

.quiz-review {
  margin-top: var(--space-32);
  padding-top: var(--space-32);
  border-top: 1px solid var(--color-border);
  text-align: left;
}
.quiz-review-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}
.quiz-review-item {
  padding-top: var(--space-32);
  border-top: 1px solid var(--color-border);
}
.quiz-review-item:first-child {
  padding-top: 0;
  border-top: none;
}
.quiz-review-index {
  display: block;
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.quiz-review-question {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading-medium);
  font-size: var(--text-body);
  margin-bottom: var(--space-12);
  color: var(--color-text);
}
.quiz-review-tag {
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  opacity: 0.85;
}
.quiz-review .quiz-choice {
  cursor: default;
}
.quiz-review .quiz-feedback {
  margin-top: var(--space-12);
}

@media (max-width: 720px) {
  .quiz {
    padding: var(--space-24);
  }
  .quiz-question {
    font-size: var(--text-body);
    font-weight: var(--font-weight-body-medium);
  }
}

/* ---------- Quiz page — /quiz  (scope: .page-quiz) ---------- */
.page-quiz .quiz-hero {
  padding-block: var(--space-96) var(--space-48);
}
.page-quiz .quiz-hero h1 {
  max-width: 20ch;
}
.page-quiz .lede {
  margin-top: var(--space-16);
  max-width: 60ch;
  font-size: var(--text-h4);
  color: var(--color-text-muted);
  line-height: var(--leading-body);
}
.page-quiz .quiz-section {
  padding-block: var(--space-64) var(--space-96);
}
.page-quiz .quiz-container {
  max-width: 56rem;
}
.page-quiz .quiz-picker {
  padding: var(--space-32);
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}
.page-quiz .quiz-picker h2 {
  font-size: var(--text-h3);
}
.page-quiz .picker-group {
  border: none;
  padding: 0;
  margin: 0;
}
.page-quiz .picker-group legend {
  padding: 0;
  margin-bottom: var(--space-12);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading-medium);
  font-size: var(--text-body);
  color: var(--color-text);
}
.page-quiz .picker-hint {
  display: inline-block;
  margin-left: var(--space-8);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-body);
}
.page-quiz .picker-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}
.page-quiz .picker-chip {
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}
.page-quiz .picker-chip:hover {
  border-color: var(--color-primary);
}
.page-quiz .picker-chip.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-on-accent);
}
.page-quiz .picker-pool-note {
  min-height: 1.2em;
  color: var(--color-text-muted);
}
.page-quiz .switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-24);
  cursor: pointer;
}
.page-quiz .switch-row-text {
  font-size: var(--text-body);
  color: var(--color-text);
}
.page-quiz .switch {
  position: relative;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}
.page-quiz .switch input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.page-quiz .switch-track {
  display: inline-flex;
  align-items: center;
  width: 40px;
  height: 22px;
  padding: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  transition: background-color var(--transition-base);
}
.page-quiz .switch-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base);
}
.page-quiz .switch input:checked + .switch-track {
  background: var(--color-accent);
}
.page-quiz .switch input:checked + .switch-track .switch-thumb {
  transform: translateX(18px);
}
.page-quiz .switch input:focus-visible + .switch-track {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.page-quiz .picker-actions {
  display: flex;
  justify-content: flex-start;
}
@media (max-width: 720px) {
  .page-quiz .quiz-hero {
    padding-block: var(--space-64) var(--space-32);
  }
  .page-quiz .quiz-section {
    padding-block: var(--space-48) var(--space-64);
  }
  .page-quiz .quiz-picker {
    padding: var(--space-24);
  }
}
.page-quiz .quiz-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow-y: auto;
}
.page-quiz .quiz-screen[hidden] {
  display: none;
}
.page-quiz .quiz-screen-bar {
  position: sticky;
  top: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-16);
  padding: var(--space-16) var(--space-24);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.page-quiz .quiz-screen-back {
  justify-self: start;
}
.page-quiz .quiz-screen-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-body-medium);
  font-size: var(--text-small);
  padding: var(--space-8);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base);
}
.page-quiz .quiz-screen-back:hover {
  color: var(--color-primary);
}
.page-quiz .quiz-timer {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}
.page-quiz .quiz-timer[hidden] {
  display: none;
}
.page-quiz .quiz-timer-value {
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lede);
  font-weight: var(--font-weight-body-medium);
  color: var(--color-text);
}
.page-quiz .quiz-timer-toggle {
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-small);
  font-weight: var(--font-weight-body-medium);
  transition: border-color var(--transition-base), color var(--transition-base);
}
.page-quiz .quiz-timer-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.page-quiz .quiz-screen-body {
  flex-grow: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-32) var(--space-24) var(--space-64);
}
.page-quiz .quiz-screen-body .quiz {
  width: 100%;
  max-width: 52rem;
}
@media (max-width: 720px) {
  .page-quiz .quiz-screen-body {
    padding: var(--space-24) var(--space-16) var(--space-48);
  }
}