/* ══════════════════════════════════════════════════════════
   Interactive Quiz Engine styles
   Reuses the warm palette variables defined in landing.css
   (--da-clay, --da-ink, --da-surface, --da-border, ...).
   ══════════════════════════════════════════════════════════ */

.quiz {
  --quiz-right: #2f9e63;
  --quiz-right-bg: rgba(47, 158, 99, 0.1);
  --quiz-wrong: #d1495b;
  --quiz-wrong-bg: rgba(209, 73, 91, 0.1);
  margin: 32px 0;
}

.quiz__loading,
.quiz__empty,
.quiz__error {
  padding: 24px;
  border: 1px dashed var(--da-border-strong, rgba(0, 0, 0, 0.14));
  border-radius: 12px;
  color: var(--da-ink-soft, #57534e);
  text-align: center;
}

.quiz__error {
  border-color: var(--quiz-wrong);
  color: var(--quiz-wrong);
}

/* ── Start screen ── */
.quiz__start {
  background: var(--da-surface, #fff);
  border: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  border-radius: 16px;
  padding: 28px;
  text-align: center;
}

.quiz__badge {
  display: inline-block;
  font-size: 0.7em;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--da-clay, #c15f3c);
  background: var(--da-clay-soft, rgba(193, 95, 60, 0.08));
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.quiz__title {
  margin: 0 0 8px;
  font-size: 1.35em;
  font-weight: 800;
  border-bottom: none;
}

.quiz__meta {
  margin: 0 0 20px;
  color: var(--da-ink-soft, #57534e);
  font-size: 0.9em;
}

.quiz__modes {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.quiz__mode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 20px;
  border: 1px solid var(--da-border-strong, rgba(0, 0, 0, 0.14));
  border-radius: 10px;
  background: transparent;
  color: var(--da-ink, #1f1e1d);
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.quiz__mode span {
  font-size: 0.72em;
  font-weight: 500;
  color: var(--da-ink-soft, #57534e);
  text-transform: none;
}

.quiz__mode.is-active {
  border-color: var(--da-clay, #c15f3c);
  background: var(--da-clay-soft, rgba(193, 95, 60, 0.08));
}

.quiz__best {
  margin: 0 0 16px;
  font-size: 0.9em;
  color: var(--da-ink-soft, #57534e);
}

/* ── Buttons ── */
.quiz__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 24px;
  border: 1px solid var(--da-border-strong, rgba(0, 0, 0, 0.14));
  border-radius: 8px;
  background: var(--da-surface, #fff);
  color: var(--da-ink, #1f1e1d);
  font-weight: 700;
  font-size: 0.92em;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.quiz__btn:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--da-clay, #c15f3c);
}

.quiz__btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.quiz__btn--primary {
  background: var(--da-clay, #c15f3c);
  border-color: var(--da-clay, #c15f3c);
  color: #fff;
}

.quiz__btn--primary:hover:not(:disabled) {
  background: var(--da-clay-hover, #a94e2e);
  border-color: var(--da-clay-hover, #a94e2e);
}

/* ── Question cards ── */
.quiz__card {
  background: var(--da-surface, #fff);
  border: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  border-radius: 14px;
  padding: 22px 24px;
  margin-bottom: 18px;
}

.quiz__qnum {
  font-size: 0.75em;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--da-clay, #c15f3c);
  margin-bottom: 8px;
}

.quiz__stem {
  font-size: 1em;
  line-height: 1.6;
  color: var(--da-ink, #1f1e1d);
}

.quiz__stem p {
  margin: 0 0 10px;
}

.quiz__stem code,
.quiz__option code,
.quiz__explain code {
  font-size: 0.85em;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(31, 30, 29, 0.06);
}

/* ── Options ── */
.quiz__options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.quiz__option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border: 1px solid var(--da-border-strong, rgba(0, 0, 0, 0.14));
  border-radius: 10px;
  background: var(--da-surface, #fff);
  color: var(--da-ink, #1f1e1d);
  font-size: 0.95em;
  line-height: 1.5;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

button.quiz__option:hover:not(:disabled) {
  border-color: var(--da-clay, #c15f3c);
  background: var(--da-clay-softer, rgba(193, 95, 60, 0.04));
}

.quiz__option:disabled {
  cursor: default;
}

.quiz__option-letter {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(31, 30, 29, 0.06);
  font-weight: 700;
  font-size: 0.8em;
}

.quiz__option.is-selected {
  border-color: var(--da-clay, #c15f3c);
  background: var(--da-clay-soft, rgba(193, 95, 60, 0.08));
}

.quiz__option.is-selected .quiz__option-letter {
  background: var(--da-clay, #c15f3c);
  color: #fff;
}

.quiz__option.is-correct {
  border-color: var(--quiz-right);
  background: var(--quiz-right-bg);
}

.quiz__option.is-correct .quiz__option-letter {
  background: var(--quiz-right);
  color: #fff;
}

.quiz__option.is-incorrect {
  border-color: var(--quiz-wrong);
  background: var(--quiz-wrong-bg);
}

.quiz__option.is-incorrect .quiz__option-letter {
  background: var(--quiz-wrong);
  color: #fff;
}

.quiz__options--review .quiz__option {
  cursor: default;
}

.quiz__yourpick {
  color: var(--da-ink-soft, #57534e);
  font-style: italic;
}

/* ── Feedback (practice + review) ── */
.quiz__feedback {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(31, 30, 29, 0.03);
  border-left: 4px solid var(--da-border-strong, rgba(0, 0, 0, 0.14));
}

.quiz__feedback--right {
  border-left-color: var(--quiz-right);
}

.quiz__feedback--wrong {
  border-left-color: var(--quiz-wrong);
}

.quiz__verdict {
  font-weight: 700;
  margin-bottom: 6px;
}

.quiz__feedback--right .quiz__verdict {
  color: var(--quiz-right);
}

.quiz__feedback--wrong .quiz__verdict {
  color: var(--quiz-wrong);
}

.quiz__explain {
  font-size: 0.92em;
  line-height: 1.6;
  color: var(--da-ink-soft, #57534e);
}

.quiz__explain p {
  margin: 0 0 8px;
}

.quiz__noteref {
  margin-top: 10px;
}

.quiz__notelink {
  font-size: 0.88em;
  font-weight: 700;
  color: var(--da-clay, #c15f3c) !important;
}

/* ── Footer / progress (practice) ── */
.quiz__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.quiz__progress {
  font-size: 0.88em;
  font-weight: 600;
  color: var(--da-ink-soft, #57534e);
}

/* ── Exam head / timer / bar ── */
.quiz__examhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.quiz__examprogress {
  font-size: 0.85em;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--da-ink-soft, #57534e);
}

.quiz__timer {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 1.1em;
  padding: 4px 12px;
  border-radius: 8px;
  background: var(--da-clay-soft, rgba(193, 95, 60, 0.08));
  color: var(--da-clay, #c15f3c);
}

.quiz__timer.is-low {
  background: var(--quiz-wrong-bg);
  color: var(--quiz-wrong);
}

.quiz__bar {
  height: 6px;
  border-radius: 4px;
  background: rgba(31, 30, 29, 0.08);
  overflow: hidden;
  margin-bottom: 18px;
}

.quiz__bar-fill {
  height: 100%;
  width: 0;
  background: var(--da-clay, #c15f3c);
  transition: width 0.3s ease;
}

.quiz__nav {
  display: flex;
  gap: 10px;
  justify-content: space-between;
  margin-top: 18px;
}

.quiz__nav .quiz__btn--primary {
  margin-left: auto;
}

/* ── Results ── */
.quiz__results {
  background: var(--da-surface, #fff);
  border: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  border-radius: 16px;
  padding: 28px;
}

.quiz__summary {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  margin-bottom: 20px;
}

.quiz__score-scaled {
  font-size: 3em;
  font-weight: 800;
  line-height: 1;
  color: var(--da-clay, #c15f3c);
}

.quiz__score-scaled.is-pass {
  color: var(--quiz-right);
}

.quiz__score-scaled.is-fail {
  color: var(--quiz-wrong);
}

.quiz__score-outof {
  font-size: 0.32em;
  font-weight: 600;
  color: var(--da-ink-soft, #57534e);
  margin-left: 6px;
}

.quiz__score-verdict {
  font-weight: 700;
  margin-top: 6px;
}

.quiz__score-verdict.is-pass {
  color: var(--quiz-right);
}

.quiz__score-verdict.is-fail {
  color: var(--quiz-wrong);
}

.quiz__score-line {
  margin: 8px 0 0;
  color: var(--da-ink-soft, #57534e);
  font-size: 0.92em;
}

/* ── Breakdown ── */
.quiz__breakdown {
  margin-bottom: 20px;
}

.quiz__breakdown-title,
.quiz__review-title {
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--da-ink-soft, #57534e);
  margin-bottom: 12px;
}

.quiz__breakdown-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 0.88em;
}

.quiz__breakdown-row > span:first-child {
  flex-shrink: 0;
  width: 48px;
  font-weight: 700;
}

.quiz__breakdown-bar {
  flex: 1;
  height: 8px;
  border-radius: 4px;
  background: rgba(31, 30, 29, 0.08);
  overflow: hidden;
}

.quiz__breakdown-bar > span {
  display: block;
  height: 100%;
  background: var(--da-clay, #c15f3c);
}

.quiz__breakdown-val {
  flex-shrink: 0;
  width: 48px;
  text-align: right;
  color: var(--da-ink-soft, #57534e);
}

.quiz__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

/* ── Review ── */
.quiz__review-item {
  border: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 14px;
  border-left-width: 4px;
}

.quiz__review-item.is-right {
  border-left-color: var(--quiz-right);
}

.quiz__review-item.is-wrong {
  border-left-color: var(--quiz-wrong);
}

.quiz__review-head {
  font-weight: 700;
  margin-bottom: 10px;
}

.quiz__review-mark {
  font-weight: 800;
}

.quiz__review-item.is-right .quiz__review-mark {
  color: var(--quiz-right);
}

.quiz__review-item.is-wrong .quiz__review-mark {
  color: var(--quiz-wrong);
}

/* ── "Test yourself" launcher used inside module notes ── */
.quiz-launcher {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 40px 0 8px;
  padding: 20px 24px;
  border: 1px solid var(--da-border, rgba(0, 0, 0, 0.08));
  border-left: 5px solid var(--da-clay, #c15f3c);
  border-radius: 12px;
  background: var(--da-clay-softer, rgba(193, 95, 60, 0.04));
}

.quiz-launcher__text strong {
  display: block;
  font-size: 1.05em;
  color: var(--da-ink, #1f1e1d);
}

.quiz-launcher__text span {
  font-size: 0.9em;
  color: var(--da-ink-soft, #57534e);
}

.quiz-launcher__btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 22px;
  border-radius: 8px;
  background: var(--da-clay, #c15f3c);
  color: #fff !important;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.quiz-launcher__btn:hover {
  background: var(--da-clay-hover, #a94e2e);
}

/* ── Quiz hub: choose module ── */
.quiz-hub {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin: 24px 0;
}

@media (max-width: 480px) {
  .quiz__nav {
    flex-wrap: wrap;
  }
  .quiz__score-scaled {
    font-size: 2.4em;
  }
}

/* ── Dark mode tweaks ── */
[data-md-color-scheme="slate"] .quiz__option-letter,
[data-md-color-scheme="slate"] .quiz__stem code,
[data-md-color-scheme="slate"] .quiz__option code,
[data-md-color-scheme="slate"] .quiz__explain code,
[data-md-color-scheme="slate"] .quiz__breakdown-bar,
[data-md-color-scheme="slate"] .quiz__bar {
  background: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="slate"] .quiz__feedback {
  background: rgba(255, 255, 255, 0.04);
}